inorganic for crash course

8/10/2019 Inorganic for Crash Course

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FOR ALL THE GATE ,ENGINEERING & MEDICAL ENTRANCE EXAMINATIONS (PICS )

PRADEEP SHARMA, INSTITUTE OF COMPETITIVE STUDIES, SECTOR 15 , SONEPATCONTACT NUMBER : 0130 2231322 , E mail : [email protected]

1. An organic compd. made of C,H & N contains 20% nitrogen.Its molecular weight is a. 70 b. 140 c. 100 d. 65

2. Which of the following compd. gives blood red colouration when its Lassaignes extract is treated with alkali &ferric chloride- a. Thiourea b. Diphenyl sulphide c. Phenyl hydrazine d. Benzamide

3. 0.1 mole of carbohydrate with empirical formula CH2O contains 1 g of hydrogen.What is its molecular formula-a. C5H10O5 b. C6H12O6 c. C4H8O4 d. C3H6O3 e. C2H4O2

4. Which of the following process is suitable for the purification of aniline a. simple distillation b. fractional distillation c. fractional crystallization d. steam distillation

5. An organic compd. contains C,H & O.Its elemental analysis gave C,38.71 % & H,9.67%.The empirical formula ofcompd. would be - a. CH2O b. CHO c. CH4O d. CH3O

6. Fractional distillation is a process by which the separation of different fractions from mixture of a solnis carried bymaking use of following property of rx

n- a. freezing point b. boiling point c. melting point d. solubility

7. 0.532 g of chloroplatinate of an organic base (mol.wt. 244) gave 0.195 g of Pt on ignition.Then the no. of nitrogenatoms per molecule of the base is - a. 1 b. 2 c. 3 d. 4

8. An organic compd. weighing 0.31 g gave 0.444 g of magnesium pyrophosphate in the estimation of phosphorusby carius method.The % of P in the compd. is a. 20 b. 60 c. 15 d. 30 e. 40

9. For the purification of organic compd. the latest technique followed is a. chromatography b. steam distillation c. fractional distillation d. sublimation e. vacuum distillation

10. An organic compd. which produces a bluish green coloured flame on heating in presence of Cu is a. chlorobenzene b. benzaldehyde c. aniline d. benzoic acid

11. 0.5g of silver salt of an organic acid (molar mass 210) on ignition gave 0.36 g of pure silver.The basicity of acid isa. 3 b. 2 c. 1 d. 4 e. 5

12. The formula of the compd. which gives violet colour in Lassaignes test for sulphur with sodium nitroprusside is

a. Na4[Fe(CN)6S] b. Na4[Fe(CN)5NCS] c. Na4[Fe(CN)5NOS] d. Na2[Fe(CN)5NCS] d. Na4[Fe(CN)5S]13. Nitrogen is estimated in organic compds. by

a. Dumas method b. Carius method c. Lassaignes method d. none of these14. Dumas method involves the determination of nitrogen content in the organic compd. in the form of

a. NH3 b. N2 c. NaCN d. (NH4)2SO415. In a compd. C,H & N are present in 9:1:3:5 by weight.If molecular mass of the compd. is 108,then molecular

formula of compd. is - a. C2H6N2 b. C3H4N c. C6H8N2 d. C9H12N3

ANSWERS OF PURIFICATION & CHARACTERISATION-

MCQs :1.b 2.b 3.a 4.d 5.d 6.b 7.d 8.e 9. a 10.a 11.a 12.c 13.a 14.b 15.c


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1. Which of the following hybridization has planar geometry a. sp3

d b. dsp3

c. dsp2

d. sp3

2. A mix. of salts (Na2SO3+ K2Cr2O7) in a test tube is treated with dil. H2SO4& resulting gas is passed through lime

water.Which of the following observations is correct about this test a. solution in test tube becomes green & lime water turns milky.b. solution in test tube is colourless & lime water turns milky.c. solution in test tube becomes green & lime water remains cleard. solution in test tube remains clear & lime water also remains clear.

3. Which is not correct about chemistry of 3d & 4f series elements a. 3d-elements show more oxidation states than 4-f series. b. The energy diff. is very little b/n 3d & 4s.c. Europium(II) is more stable than Ce(II). d. The paramagnetic character in 3D series increases from Sc to Cu.

4. The no. of unpaired e-s in gaseous species of Mn

3+,Cr

+& V

3+are . & most stable species is .

a. 4,3 & 2 & V3+

is most stable b. 3,3 & 2 & Cr3+

is most stablec. 4,3 & 2 & Cr

3+is most stable. d. 3,3 & 3 & Mn

3+is most stable.

5. The oxidant which is used as an antiseptic is a. KBrO3 b. KMnO4 c. CrO3 d. KNO36. The catalyst used for olefin polymerization is a. Ziegler-Natta catalyst b. Wilkinsons catalyst c. Raney nickel d. Merrifield resin

7. Knowing the chemistry of lanthanoids(Ln) is dominated by its +3 oxidation state(O.S),which of the followingstatement is incorrect - a. The ionic size of Ln(III) decreases in general with increasing in atomic no.b. Ln(III) compds. are generally colourless c. Ln(III) hydroxides are mainly basic in character.d. because of large size of Ln(III) ions,the bonding in its compd. is predominantly ionic in character.

8. In context with transition elements,which of the following statement is correct a. In highest O.S,transition metals show basic character & form cationic complexes.b. In highest O.S of 1

stfive transition elements (Sc to Mn),all the 4s & 3d e

-s are used for bonding.

c. Once d5config. is exceeded,the tendency to involve all 3d e

-s in bonding decreases.

d. In addition to normal O.S,zero O.S is also shown by these elements in complexes.9. On which factors,stability of O.S of lanthanide elements depends

a. enthalpy b. internal energy c. combined effect of hydration & ionization energy d. electronic configuration10. Potassium dichromate is used

a. in electroplating b. as reducing agent c. in oxidnof Fe

2+to Fe

3+in acid media d. as insecticide

11. Which one of the following d-block elements has half filled penultimate d-subshell as well as half filled valence s-subshell- a. Cr b. Pd c. Pt d. Cu e. Au

12. Which of the following pairs of transition metal ions are stronger oxidizing agents in aq. solution-a. V

2+& Cr

2+ b. Ti

2+& Cr

2+ c. Mn

3+& Co

3+ d. V

2+& Fe

2+ e. Ni

2+& Fe

2+

13. The electronic config. 1s22s

22p

63s

23p

63d

9represents a

a. metal atom b. non-metal atom c. non-metallic anion d. metallic cation14. The malleability & ductility of metals can be accounted due to

a. capacity of layers of metal ions to slide over the other b. interaction of e-s with metal ions of lattice

c. presence of electrostatic force d. crystalline structure in the metal.15. Which of the following ions has a magnetic moment of 5.93 B.M (At.No. V=23,Cr=24,Mn=25,Fe=26)-

a. Mn2+

b. Fe2+

c. Cr2+

d. V3+

e. Cr3+

16. In which of the following ions,d-d transition is not possible - a. Ti4+ b. Cr3+ c. Mn2+ d. Cu2+17. The oxidation state of Cr in chromium trioxide is - a. +3 b. +4 c. +5 d. +618. The colour of transition metal ions is due to the presence of unpaired e

-transitions in the available empty

a. d-orbitals b. p-orbitals c. s-orbitals d. s- & p-orbitals19. The group of elements in which the differentiating e

-enters the antepenultimate shell of atom is called

a. f-block elements b. p-block elements c. s-block elements d. d-block elements20. +3 O.S is most common in - a. Ni(28) b. Fe(26) c. Zn(30) d. Cu(29)21. The actinoids exhibits more no. of O.S in general than lanthanoids.This is because

a. 5f-orbitals extend further from the nucleus than 4f orbitals b. 5f orbitals are more buried than 4f orbitals.c. There is similarity b/n 4f & 5f orbitals in their angular part of wave function. d. actinoids are more reactive.

22. Identify the incorrect statement among the following a. 4f & 5f are equally shielded b. d-block elements show irregular & erratic chemical properties among themselvesc. La & Lu have partially filled d-orbitals d. The chemistry of very lanthanoids are similar.

23. The d-e-

config. of Cr2+

,Mn2+

,Fe2+

& Ni2+

are 3d4

,3d5

,3d6

,3d8

.Which one of the following aqua complexes will exhibitthe minimum paramagnetic behavior a. [Cr(H2O)6]

2+ b. [Mn(H2O)6]

2+ c. [Fe(H2O)6]

2+ d. [Ni(H2O)6]

2+

24. Which one of the following ions is most stable in aq. solution - a. Mn3+

b. Cr3+

c. V3+

d. Ti3+

25. Which one of the following is not ferromagnetic - a. Co b. Fe c. Mn d. Ni

MCQs (Transition elements):1. c 2.c 3.d 4.c 5.b 6.a 7.b 8.a 9.c 10.c 11.a 12. c 13.d 14.a 15.a 16.a 17.d 18.a 19.a20.b 21. a 22.a 23.d 24.b 25.c


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1. The five d-orbitals are designated as dxy,dyz,dxz,dx2-y2& dz2.Coose the correct statement a. The shapes of 1

stthree orbitals are similar but that of the 4

th& 5

thorbitals are different.

b. The shapes of all five d-orbitals are similar. c. The shapes of all five d-orbitals are different.d. The shapes of first four orbitals are similar but that of 5

thorbital is different.

2. What is (are) number(s) of unpaired e-in the square planar [Pt(CN)4]

2-ion a. zero b. 1 c. 4 d. 6

3. In spectrochemical series chlorine is above than water i.e. Cl > H2O , this is due to a. Good -acceptor properties of Cl . b. Strong -donor & good -acceptor properties of Clc. Good -donor properties of Cl d. Large size of Cl than H2O

4. When EDTA solution is added to Mg2+

ion solution, then which of the following statement is not true a. Four coordinate sites of Mg

2+are occupied by EDTA & remaining two sites are occupied by water molecules.

b. All six coordinate sites of Mg2+

are occupied. c. pH of the solution is decreased.d. colourless [Mg-EDTA]

2-chelate is formed.

5. For square planar complex of Pt(II),[Pt(NH3)(Br)(Cl)Py]0,how many isomeric forms possible a. 2 b. 3 c. 4 d. 6

6. For the given complex [CoCl2(en)(NH3)2]+

,the no. of geometrical isomers,the no. of optical isomers & total no. ofisomers of all possible types are - a. 2,2 & 4 b. 2,2 & 3 c. 2,0 & 2 d. 0,2 & 2

7. The crystal field stabilization is highest for a. [CoF4]2-

b. [Co(NCS)4]2-

c. [Co(NH3)6]3+

d. [CoCl4]2-

8. The expected spin only magnetic moments for [Fe(CN)6]4-

& [FeF6]3-

are a. 1.73 & 1.73 B.M b. 1.73 & 5.92 B.M c. 0.0 & 1.73 B.M d. 0.0 & 5.92 B.M

9. The magnitude of CFSE or tin tetrahedral complexes is considerably less than in the octahedral field because a. There are only 4 ligands instead of 6 so ligand field is only 2/3 the size hence tis only 2/3 of size.b. The direction of orbitals does not coincide with direction of ligands.This reduces tby further 2/3.c. Both points a & b are correct d. Both points a & b are incorrect

10. Which of the following complex ions is expected to absorb visible light a. [Ti(en)2(NH3)2]

4+ b. [Cr(NH3)6]

3+ c. [Zn(NH3)6]

2+ d. [Sc(H2O)3(NH3)3]

3+

11. Which of the following does not show optical isomerism a. [Co(NH3)3Cl3]

0 b. [Co(en)Cl2(NH3)2]

+ c. [Co(en)3]

3+ d. [Co(en)2Cl2]

+

12. Out of TiF62-

,CoF63-

,Cu2Cl2& NiCl42-

(Z of Ti = 22,Co=27,Cu=29,Ni=28) colourless species are a. Cu2Cl2& NiCl42- b. TiF6

2-& Cu2Cl2 c. CoF6

3-& NiCl4

2- d. TiF6

2- & CoF6

3-

13. In Cu-ammonia complex , the state of hybridization of Cu+2

is - a. sp3 b. d

3s c. sp

2d d. dsp

2

14. Which of the following pair represents linkage isomers a. [Pd(PPh3)2(NCS)2] & [Pd(PPh3)2(SCN)2] b. [Co(NH3)5NO3]SO4& [Co(NH3)5SO4] NO3c. [PtCl2(NH3)4]Br2 & [PtBr2(NH3)4]Cl2 d. [Cu(NH3)4][PtCl4] & [Pt(NH3)4][CuCl4]

15. Which of following has optical isomers- a.[Co(en)(NH3)2]2+

b. [Co(en)(H2O)4]3+

c.[Co(en)2(NH3)2]3+

d. [Co(NH3)3Cl]+

16. How many e-s are present in 3d orbital of tetrahedral K2[NiCl4] complex - a. 8 b. 10 c. 7 d. 6

17. The 10& 2

0valencies of Cr in complex ion,dichlorodioxalato chromium(III) are a. 3,4 b. 4,3 c. 3,6 d. 6,3

18. Which of the following complex exhibits the highest paramagnetic behavior (bpy = bipyridyl moities)a. [V(gly)2(OH)2(NH3)2]

+ b. [Fe(en)(bpy)(NH3)2]

2+ c. [Co(ox)2(OH)2]

2- d. [Ti(NH3)6]

3+

19. The coordination no. & oxidation state of the element E in the complex [E(en)2(C2O4)]NO2are a. 6 & 3 b. 6 & 2 c. 4 & 2 d. 4 & 3

20. In which of the following octahedral complexes of Co will the magnitude of 0be highest

a. [Co(NH3)6]3+ b. [Co(CN)6]3- c. [Co(C2O4)3]3- d. [Co(H2O)6]3+21. The IUPAC name of [Ni(NH3)4][NiCl4] is

a. Tetrachloronickel(II)-tetraammine nickel(II) b. Tetraamminenickel(II)-tetrachloro nickel(II)c. Tetraamminenickel(II)-tetrachloronickelate(II) d. Tetrachloronickelate(II)-tetraamminenickelate(II)

22. Both Ni(CO)4& [Ni(CN)4]2-are diamagnetic.The hybridisationof Ni in these complexes are

a. sp3,sp

3 b. sp

3,dsp

2 c. dsp

2,sp

3 d. dsp

2, dsp

2

23. What will be the theoretical value of magnetic moment when CN-ligands join Fe

3+ion to yield complex-

a. 2.83 BM b. 3.87 c. 5.92 d. 1.7324. The no. of unpaired e

-s in [Co(NH3)6]

3+& [CoF6]

3-are a. 4 & 4 b. 0 & 2 c. 2 & 4 d. 0 & 4

25. When SCN-is added to an aq. sol

ncontaining Fe(NO3)3,the complex produced is

a.[Fe(H2O)2(SCN)]2+

b. [Fe(H2O)5(SCN)]2+

c. [Fe(H2O)3(SCN)]2+

d. [Fe(H2O)(SCN)]6+

26. Among the following complexes the one which contains a d

6metal ion is

a. K3[Fe(CN)6] b. K4[Fe(CN)6] c. [Co(NH3)6]Cl2 d. [Ni(NH3)6]Cl2

27. Which of the following has geometrical isomers- a.[Co(NH3)3Cl] b. [Co(en)2Cl2]+

c. [Cr(H2O)5Cl]2+

d. [Pt(NH3)3Cl]+

28. Which of following has largest d-orbital splitting energy a. [Co(H2O)6]3+

b.[Fe(H2O)6]3+

c. [CrCl6]3-d. [Cr(H2O)6]

3+

29. For which of following would it not be possible to distinguish high spin from low spin complexes in octahedralgeometry- a. Co(II) b. Fe(II) c. Co(III) d. Ni (II)


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1. Hydrogen is an important component of a. laughing gas b. marsh gas c. water gas d. producer gas2. The statement that is not correct is

a. In a simple galvanic cell,Zn rod is anode b. Mohrs salt is FeSO4(NH4)2SO4.6H2Oc. AgCl is sparingly soluble in water because its lattice energy is greater than salvation energy.d. Bleaching action of H2O2is due to the reduction process.

3. The presence of potassium ions in solution can be detected by a. pyroantimonate test b. cobaltinitrite test c. lassaignes test d. molybdate test

4. When microcosmic salt is heated then a. nitrogen is evolved b. sodium metaphosphate & NH3are obtained.c. calcium superphosphate is produced d. NH3& HCl are evolved.

5. In case of alkali metals,the covalent character decreases in the order a. MI>MBr>MCl>MF b. MCl>MI>MBr>MF c. MF>MCl>MBr>MI d. MF>MCl>MI>MBr6.RbO2is a.peroxide & paramagnetic b. peroxide & diamagnetic

c. superoxide & paramagnetic d. superoxide & diamagnetic7. The alkali metals form salt-like hydrides by direct synthesis at elevated temp. The thermal stability of these

hydrides decreases in which of the order - a. NaH>LiH>KH>RbH>CsH b. LiH>NaH>KH>RbH>CsHc. CsH>RbH>KH>NaH>LiH d. KH>NaH>LiH>CsH>RbH

8.Sodium peroxide which is a yellow solid,when exposed to air becomes white due to the formnof

a. H2O2 b. Na2O c. Na2O & O3 d. NaOH & Na2CO3 e. NaOH & H2O29.The order of Molar conductivities of Li

+,Na

+,K

+& Rb

+ions in aq. sol

nis

a. Li+>Na

+= K

+< Rb

+ b. Li

+>Na

+> K

+=Rb

+ c. Rb

+>K

+>Na

+>Li

+ d.Li

+>Rb

+>K

+>Na

+

10. The carbonate that will not decompose on heating is a. Na2CO3 b. CaCO3 c. BaCO3 d. SrCO3e. Li2CO311. NaOH is a. hygroscopic b. efflorescent c. deliquescent d. photosensitive12. The magnetic moment of KO2at room temp. is ..BM

a. 1.41 b. 1.73 c. 2.23 d. 2.6413. Among the following paramagnetic compd. is a. Na2O2 b. O3 c. N2O d. KO214. Brine solution on electrolysis will not give a. NaOH b. Cl2 c. H2 d. O215. The ionic mobility of alkali metal ions in aq. solution is maximum for - a. K

+ b. Rb

+ c. Li

+ d. Na

+

1. Among the following metallic sulphates,the one which does not yield oxide on heating in air is a. sodium sulphate b. aluminium sulphate c. zinc sulphate d. magnesium sulphate

2. Lithopone,which is used as a white pigment is a mixture of a. ZnSO4& BaSO4 b. ZnS & BaSO4 c. BaS & ZnSO4 d. ZnO & BaO

3. The heats of hydration of Ca2+

,Sr2+

,Ba2+

decreases in order a. Ba

2+>Sr

2+>Ca

2+ b. Sr

2+>Ba

2+> Ca

2+ c. Ca

2+>Sr

2+>Ba

2+d. Ca

2+>Ba

2+>Sr

2+

4. Electron is an alloy of - a. Mg & Zn b. Fe & Mg c. Ni & Zn d. Al & Zn

5. The set representing the correct order of ionic radius is a. Na

+>Li

+>Mg

2+>Be

2+ b. Li

+>Na

+> Mg

2+>Be

2+ c. Mg

2+>Be

2+> Li

+>Na

+ d. Li

+>Be

2+>Na

+>Mg

2+

6. Which one of following is used for manufacture of Calciuma. reduction of CaO with C b. reduction of CaO with H2c. electrolysis of a mixture of anhyd. CaCl2& CaF2 d. electrolysis of molten Ca(OH)2

7. Which one of the following is correct a. B2H6.2NH3is known as inorganic benzene. b. Boric acid is protonic acid.c. Be exhibits coordination no. 6. d. Chlorides of both Be & Al have bridged chloride structure in solid phase.

8. Which pair of following chlorides do not impart colour to the flame a. BeCl2& SrCl2 b. BeCl2& MgCl2 c. CaCl2& BaCl2 d. BaCl2& SrCl2

9. BaSO4is water insoluble although this is an ionic compd. a. low lattice energy b. high bond energyc. lattice energy more than solvation energy d. solvation energy is more than lattice energy.

10. Calcium sulphate is sparingly soluble in - a. water b. alcohol c. acetic acid d. benzene11. The correct order of thermal stability is - a. K2CO3


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1. The thermite process is based on the a. fusion mixture composition b. ability of Al as a reducing agentc. ability of Al2O3to decompose at a higher temp. d. low melting nature of aluminium

2. Among the rxns given for B2H6,the one which does not take place

a. B2H6+ HCl B2H5Cl + H2 b. B2H6+ 2 NH3HEAT

B3N3H6(Borazine)

c. B2H6+ 2N(CH3)3 2[(CH3)3N.BH3] d. B2H6+ 6 C2H4H3O+

3 C2H5OH + 2 B(OH)33. The wrong statement among the following is

a. aluminium has high affinity for oxygen. b. anhyd. AlCl3can be prepared by heating Al in stream of dry HCl gasc. all Al-Cl bonds in Al2Cl6are equivalent .d. anhyd. AlCl3fumes in moist air to give Al(OH)3

4. In Al extraction by Baeyers process,alumina is extracted from bauxite by NaOH at high temp. & pressureAl2O3(s) + 2OH

-(aq)2AlO2

-(aq) + H2O(l) Solid impurities such as Fe2O3& SiO2are removed & then Al(OH)4

-is

reprecipitated - Al(OH)4-Al2O3.3H2O(s) + 2 OH

-(aq) . In the industrial world

a. CO2is added to precipitate the alumina. b. Temp. & pressure are dropped & supersaturated sol

n

seeded.c. both a & b are practiced d. The water is evaporated.5.The bond dissociation energy of B-F in BF3is 646 kJ/mol whereas that of C-F in CF4is 515 kJ/mol.The correct

reason for higher B-F bond dissociation energy as compared to that of C-F is a. stronger -bond b/n B & F in BF3as compared to C & F in CF4.b. significant p-p interaction b/n B & F in BF3whereas no such possibility b/n C & F in CF4.c. lower degree of p-p interaction b/n B & F in BF3

than b/n C & F.

d. Smaller size of B-atom as compared to C atom.6. The stability of +1 oxidation state increases in the sequence

a. Ga


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5. The following two rxns of HNO3with Zn are given (eq

ns are not balanced)

Zn + conc.HNO3Zn(NO3)2+ X + H2O , Zn + dil.HNO3Zn(NO3)2+ Y + H2O, the X & Y are a. NO2& NO b. NO2& NO2 c. NO & NO2 d. NO2& NH4NO3

6. In Pyrophosphoric acid,H4P2O7,no. of - & d-p bonds are - a. 8 & 2 b. 6 & 2 c. 12 & zero d. 12 & 27. The rx

nof P4with X leads selectively to P4O6.The X is

a. dry O2 b. mix. of O2& N2 c. moist O2 d. O2in the presence of aq. NaOH

8. In which of the following arrangements,the sequence is not strictly according to the property written against it a. HFHClO4 c. HClO4>HClO3>HClO2 d. HF>H2O>NH3

6. Among the following which is strongest oxidizing agent - a. Cl2 b. F2 c. Br2 d. I27. Aq. solution of Na2S2O3on reaction with Cl2gives

a. Na2S4O6 b. NaHSO4 c. NaCl d. NaOH8. Which one of the following does not give correct picture of trends indicated against it

a. F2>Cl2>Br2>I2(bond dissociation energy) b. F2>Cl2>Br2>I2(electronegativity)c. F2>Cl2>Br2>I2(oxidizing power) d. Cl2> F2>Br2>I2(e

-gain enthalpy)

9. In which of the following pairs,two species are isostructural a. BrO3

- & XeO3 b. SF4& XeF4 c. SO3

2-& NO3

- d. BF3& NF3

10. Identify the correct statement among the following a. Br

2reacts with hot & strong NaOH sol

nto give NaBr,NaBrO

4& H

2O

b. Ozone reacts with SO2to give SO3. c. Si reacts with NaOH(aq.) in presence of air to give Na2SiO3& H2O


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d. Cl2reacts with excess of NH3to give N2& NH4Cl11. In which of the following molecules are all the bonds not equal a. NF3 b. ClF3 c. BF3 d. AlF312. The isoelectronic pair is a. Cl2O,ICl2

- b. Cl2

-,ClO2 c. IF2

+, I3

- d. ClO2

-,ClF2

+

13. Which two of following salts are used for preparing iodized salt i. KIO3ii. KI iii. I2 iv. HIa. i & ii b.i & iii c. ii & iv d. iii & iv

14. Which products are expected from disproportionation rxnof hypochlorous acid

a. HClO3& Cl2O b. HClO2& HClO4 c. HCl & Cl2O d. HCl & HClO315. Which of the following represents the correct order of e

-gain enthalpy

a. F


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1. Which of the following polymer is prepared from caprolactam a. Nylon 6,6 b. Nylon 6,10 c. Nylon 6 d. Nylon 112. Given the polymers : A = Nylon,B=Buna-S,C=polythene.Arrange these in increasing order of their intermolecular

forces (lower to higher) - a. A>B>C b. B>C>A c. B


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1. Green chemistry means such rxnwhich

a. are related to the depletion of ozone layer.b. study the reactions in plants

c. produce colour during reactionsd. reduce the use & production of hazardous chemicals

2. The process of eutrophication is due to a. increase in conc. of insecticide in water .b. increase in conc. of fluoride ion in water.c. the reduction in conc. of dissolved oxygen in water due to phosphate pollution in water.d. attack of younger leave of a plant by peroxyacetyl nitrate.e. increase in conc. of radioactive aubstances in water

3. The environment friendly method of killing harmful insects is through the use of a. insecticides b. sex attractants c. sex hormones d. pesticides e. antibiotics

4. Identify the wrong statement in the following a. acid rain is mostly because of oxides of N & Sb. chlorofluorocarbons are responsible for ozone layer depletion

c. Green house effect is responsible for global warmingd. Ozone layer does not permit infrared radiations from sun to reach the earth.5. The atmospheric gas which cant produce green house effect is

a. N2 b. H2O c. CO2 d. O36. Which of the following is not a green house gas

a. CO2 b. CH4 c. O3 d. N2 e. CCl2F27. High conc. of fluoride is poisonous & harmful to bones & teeth in levels over

a. 1 ppm b. 3 ppm c. 5 ppm d. 10 ppm8. In antartica ozone depletion is due to the formation of following compds.

a. Acrolein b. peroxy acetyl nitrate c. SO2 & SO3 d. Chlorine nitrate e. formaldehyde9. Ozone in stratosphere is depleted by

a. CF2Cl2 b. C2F16 c. C6H6Cl6 d. C6H610. The smog is essentially caused by the presence of

a. O2& O3 b. O3& N2 c. oxides of S & N d. O2& N211. When rain is accompanied by a thunderstorm,the collected rain water will have pH value

a. slightly higher than that when thunderstorm is not there.b. Uninfluenced by occurrence of thunderstormc. Which depends upon the amount of dust in aird. Slightly lower than that of rain water without thunderstorm

12. Surface water contains a. salt + organic matter b. only salt c. organic matter d. suspended impurity

13. Ozone is formed in the upper atmosphere from oxtgen by the action of a. ultraviolet rays b. cosmic rays c. f ree radicals d. nitrogen oxides e. thermal radiation from sunlight

14. The green house effect is caused by a. NO2 b. NO c. CO d. CO2

15. Which of the following causes damage to the building containing Calcium & responsible for cough & choking inhuman a. sulphur b. carbon c. nitrogen dioxide d. sulphur dioxide

ANSWERS OF ENVIORNMENTAL CHEMISTRY-1.d 2.c 3.b 4.d 5.a 6.d 7.d 8.d 9.a 10.c 11.d 12.a 13.a 14. d 15.d


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1. The role of phosphate in detergent powder is to a. control pH level of detergent water mixture.

b. remove Ca2+

& Mg2+

ions from water that cause the hardness of water.c. provide whiteness to the fabrics.d. form solid detergents as phosphateless detergents are liquid in nature.

2. Which of the following statements is not true a. pheromones are secreted outside the body of the insects.b. aspirin is analgesic as well as antipyretic.c. Sucrose is a dipeptide commonly known as aspartame.d. The DNA assists in the synthesis of RNA molecule.

3. The oxidant which is used as an antiseptic is a. KBrO3 b. KMnO4 c. CrO3 d. KNO3

4. Which of the following is employed as a tranquilizer a. naproxen b. tetracycline c. chloropheniramine d. equanil

5. Which of the following statements is not true

a. some disinfectants can be used as antiseptic at low concentration.b. Sulphadiazine is a synthetic antibacterial.c. Pheromones provide chemical means of establishing communicationd. Aspirin is analgesic & antipyretic.e. Norethindrone is a pheromone.

6. Which among the following is not an antibiotic a. penicillin b. oxytocin c. ofloxacin d. tetracycline

7. Pick out the statement which is not true a. Tetrazine is a harmful edible colour.b. Alitame is an artificial sweetner.c. BHT is an antioxidantd. Sodium alkyl sulphate is a cationic detergent.e. The performance of a rocket propellant is measured in terms of specific impulse.

8. Detergents are known to pollute rivers & water ways.However,detergents can be made biodegradable & pollutionfree by taking

a. cyclic hydrocarbon chainb. shorter hydrocarbon chainc. unbranched hydrocarbon chaind. hydrocarbon with more branchinge. benzenoid hydrocarbon

9. Which of the following is used as a morning after pill a. Norethindrone b. Ethynylestradiol c. Mifepristone d. Bithional e. Promethazine

10. Among the following sweetners which one has the lowest sweetness value a. alitame b. aspartame c. saccharin d. sucralose

11. Tincture of iodine is a. aq. solution of I2b. sol

nof I2in aq. KI

c. alcoholic solnof I2d. aq. solution of KI

12. Which of the following drugs reduce fever a. Analgesic b. Antipyretic c. Antibiotic d. Tranquiliser

13. The correct structure of paracetamol is a. HO - -CONH2 b. HO- -NHCOCH3 c. Cl- -CONH2 d. Cl- -NHCOCH3

14. Barbituric acid & its derivatives are well known as a. tranquillizers b. antiseptics c. analgesics d. antipyretics e. antibiotics

15. Which of the following is not a broad spectrum antibiotic a. tetracycline b. chloromycetin c. penicillin d. none of these

ANSWERS OF CHEMISTRY IN EVERY DAY LIFE -1.a 2.c 3.b 4.d 5.e 6.b 7.d 8.c 9.c 10.b 11.c 12.b 13.b 14.a 15.c


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BIOMOLECULES are chemicals required for the normal life process. E.g. carbohydrates , proteins , DNA lipids etc.CARBOHYDRATES -These are the polyhydroxy aldehyde or ketone which give them on hydrolysis.CLASSIFICATION- 1. MONOSACCHARRIDES 2. OLIGOSACCHARIDES3.POLYSACCARIDES

1.MONOSACCHARIDES : These are those carbohydrate which can not be hydrolysedto smaller carbohydrates. G.F. = (CH2O)n n=3 - 7

2. OLIGOSACCCHARIDES: These are those carbohydrate which on hydrolysis give2-10 monosaccharides. e.g. Sucrose (C12H22O11), maltose (C12H22O11),lactose.

(a) Disaccharides: These are those carbohydrate which on hydrolysis give 2 monosaccharides. e.g. Sucrose(C12H22O11), maltose (C12H22O11),lactose.

(b)Trisaccharides: These are those carbohydrate which on hydrolysis give 3 monosaccharides. e.g. Raffinose.3.Polysaccharides : These are those carbohydrate which on hydrolysis give large monosaccharides. e.g.

starch , cellulose.

Six membered ring structure is known asPyranosestructure ( from Pyran) & five membered ringstructure is known as Furanosestructure (* from Furan ).

CLASSIFICATION OF MONOSACCHARIDESA . (a) Aldose : These are the monosaccharides having aldehyde group.

Types :(1) Aldotriose : D-Glyceraldehyde(b) Ketose: These are the monosaccharides having ketone group.Types: (1) Ketotriose : Di hydroxy acetone

B. (a) D- nomenclature : If on the last chiral C atom , OH or NH2gp. on R.H.S,than it is known as D-compound.(b) L- nomenclature: If on the last chiral C atom OH or NH2gp. on L.H.S, than it is known as L-compound.

D & L nomenclature is a relative nomenclature & is based upon the structure of D-Glyceraldehyde

Monosaccharides exist in hemiacetal cyclic structure or hemiketal cyclic structureANOMERS : These are the stereoisomers which differ from each other on 1

stchiral C-atom. This 1

stchiral C-atom is

known as anomeric C-atom.TYPES: a. -Anomer : These are those anomers in which OH gp on 1

stchiral Catom is on R.H.S.

b. - Anomers: These are those anomers in which OH gp on 1st

chiral Catom is on L.H.SC. (a)REDUCING SUGAR: These are those carbohydrates which can reduce Tollens reagent & Fehling solution

All monosaccharides & disaccharides except SUCROSE are reducing sugars .(b) NONREDUCING SUGAR: These are those carbohydrates which can not reduce Tollens reagent & Fehling

solution . Carbohydrates other than monosaccharides & disaccharides excluding SUCROSE are nonreducing sugrs .

Reducing nature is due to the presence of hemiacital C-atom or anomeric OH gp.

GALACTOSE: It differ from Glucose at 4th OH arrangement.

GLYCOSIDIC LINKAGE: This is the linkage which is formed b/n a carbohydrate and OH gp.

If the linkage involve configuration , then it is gl ycosidic . If then it is - glycosidic linkage.

Maltose = C4() - C1() Glucose linkage. Sucrose = C1() - C2()Glucose fructose

Lactose= C1() galactose - C4()glucose

Mutarotation is the change in sp. Rotation of an optically active compd. to an eqmmixture with the passage of time.

Glucose open chain Glucose52.1 19o

PROTEINS -These are biopolymers which are made up of amino acid ( amino acid ).

R CH COOHNH2

ZWITTER ION: Protein exist as a dipolar ion in which NH2gp. acquire a H+and COOH gp. lose the proton .

ISOELECTRIC POINT: In the acidic solution , the amino acid exist as cation and hence migrate towards cathode.PEPTIDE BOND: It is the bond formed b/n NH2gp. of one amino acid and COOH gp. of other amino acid .DIPEPTIDE: These amino acids are formed by the combination of two amino acids by the removal of one H2O.POLYPEPTIDE:. These are the compounds formed by the combination of large number of amino acids. If their

molecular mass becomes more than 10000, then it is known as protein.N terminal amino acid: These are the amine acid in which free NH2gp. is present.C terminal amino acid: These are the amino acid in which free -COOH gp. is present

TYPES OF PROTEINS

1. SIMPLE PROTEINS :These are those proteins which on hydrolysis give only amino acids.2. CONJUGATE PROTEINS: These are those proteins which on hydrolysis give amino acids & some other groups

The other attached part is called as PROSTHATIC GROUP.3. DERIVED PROTEINS: These are the hydrolysed part of simple & conjugate proteins.

DENATURATION :When protein is heated or treated with acid it gets coagulated or precipitated & loses itsbiological activity and this is known as denatured protein.

Denaturation involve splitting of 2o structure ( H bond ) in to 1

oinsolub le fibrous protein.

RENATURATION: It involve conversion of denatured protein to normal soluble protein by giving the samecondition of temperature and pressure and pH in which native protein was stable.

NUCLEIC ACID-These are biopolymer made up of (a) Pentose sugar (b) Nitrogenous base (c) Phosphoric acid

Bonding in NUCLEIC ACID- Phosphoric acid - Sugar Nitrogenous base.


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SUGAR: Two type of sugar: Ribose, C5H10O5& De-oxyribose sugar,C5H10O4

NITROGENOUSBASE:1. Purine: a. Adenine b. Guanine2. Pyrimidene : a. Uracil b. Thyamine c. Cytosine

TYPE OF NUCLEICACID:A. Deoxyribonucleic Acid ( DNA)B. Ribonucleic Acid (RNA)

Structure of DNA-1

oSTRUCTURE: The 1

ostructure represents sequence of N base in DNAor RNA.In this structure of nucleic acid,

the N-base is attached to the sugar by the C1of sugar .The phosphoric acid is attach to C5of one sugar and C3ofother sugar.Back bone is of Ribose sugar and Phosphoric acid.

2oSTRUCTUREOFDNA: It was Given by Watson .DNA consist of double strand of nucleotide. In which N. base ofboth strand gets pair up with each other in such a way that A with T ( by 2 H-bond) , G with C (by 3 H bond )(base pairing principle ). The 2 strand run in opposite way. Distance b/n 2 N-base is 1.34 A

oand b/n 2 turn 34 A

o

DNA-REPLICATION: It is the process by which DNA molecule form 2 copies of itself and this phenomenon is also

known as cell division or Replication.LIPIDS- These are the biomolecules which are insoluble in water or polar solvent . These are of 3 types:( a ) Triglycerides ( b ) Phospholipid ( c ) Wax

These are biocatalyst which are used to catalyze reaction without undergoing any changeThe protein by which they are made up is globular. Some time , enzymes are associated with non proteinous part , which is known as Co enzyme.

CHARACTERSTICS1. SPECIFICITY: They are specific in their action. A particular type of enzyme can catalyst only a particular

type of reaction.O UREASE

NH2 C NH2 NH3 + CO2

2. EFFICIENCY: Efficiency of enzyme is the extent up to which a catalyst can Increases the rate of reactionEnzyme can increases rate of reaction up to 10

20times.

3. They are affected by pH and temperature . The enzyme lost their action at high temperature.4. Their action is inhibited by certain substance called enzyme inhibitor.

GENE: It represent the segment of DNA which synthesis particular protein. For every protein there present a genein or body. The relationship b/n nucleotide and aminoacid is called Genetic code.

MUTATION: The change in sequence of amino acid which alter the synthesis of particular protein .This is due toenvironmental factors like X rays.

1. Which of the following hormone contains iodine a. testosterone b. adrenaline c. thyroxine d. insulin2. The no. of disulphide linkage present in insulin are a. 3 b. 4 c. 1 d. 23.The segment of DNA which acts as the instruction manual for the synthesis of protein is

a. ribose b. gene c. nucleoside d. nucleotide4. -D(+)-glucose & -D(+)glucose are a. enantiomer b. conformers c. epimers d. anomers5. If one strand of DNA has sequence ATGCTTGA ,the sequence in the complementary strand would be

a. TCCGAACT b. TACGTAGT c. TACGAACT d. TAGCTAGT e. TACGAATC6. Which of the following is an amine hormone a. Oxypurin b. insulin c. progesterone d. Thyroxine7. Cellulose is soluble in a. ammonical cupric hydroxide solution b. organic solvents c. water d. none of these8. Which amino acid has phenolic OH group as its backbone a. glycine b. leucine c. serine d. tyrosine9. The vitamine which is neither soluble in water nor in fat is a. biotin b. phylloquinone c. thiamine d. ergocalciferol10.One of the different amino acids which can be synthesized in the body is

a. lysine b. histidine c. valine d. phenylalanine e. alanine11.Which of the following statement is true

a. DNAs are nucleotides & RNAs are nucleosides. b. Nucleoside + phosphate ester bond = nucleotidec. Nucleotide + phosphate ester bond = nucleoside d. None of these

12. RNA & DNA are chiral molecules,their chirality is due to a. D-sugar component b. L-sugar component c. chiral bases d. chiral phosphate ester unit

13. Which of the following statement is incorrect for sucrose a. It is obtained from cane sugar.b. it is not a reducing sugar.c. On hydrolysis,it gives equal amounts of D-glucose & D-fructose.d. It gives aspartame when it is heated at 210

0C.

14. Which of the vitamin is water soluble a. vitamine E b. vitamine K c. vitamine A d. vitamine B

15. The secondry structure of protein refers to-a. fixed config. of polypeptide back bone. b. -helical backbonec. hydrophobic interactions d. sequence of -amino acids

ANSWERS OF BIOMOLECULES -1. c 2. a 3. b 4. d 5.c 6.d 7. a 8.d 9.a 10.e 11. b 12.a 13.d 14. d 15. b

inorganic for crash course

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