practice sheet (1)

8/12/2019 Practice Sheet (1)

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Practice sheet

Single Answer Questions

1. A versatile reducing agent which can reduce any reducible group is an organic compound is

(a) 4NaBH (b) 2 5/Na C H OH (c) 2 /H Pt (d) 2 6 /B H THF

2. A nonlinear molecule is

(a) 2 2H C C CH= = (b) H C C C N

(c) 2H C C CH C CH= = (d) 2N O!. "ercentage o# chlorine is chlorophyll is

(a) 5$ (b) 25 (c) 1$.! (d) $

4. %lucose OH

an endiolOH #ructose. An endiol is a molecule processing both a &'& bond with two

groups altac*ed to the carbon atoms. +he endiol is a

(a) ,tereoisomer o# glucose

(b) stereoisomer o# #ructose(c) tautomer o# glucose

(d) tautomer o# glucose and #ructose.

5.

N

N

NH2

N

N

CH3

..

.

.

.

. ..

..1

2

34

56

7

8

9

+he least basic - atom is

(a) 1/! (b) 6 (c) (d)

6. 0hich o# the #ollowing has a lower "*a than a carboylic acid

(a) "henol (b) "uloroglucircol

(c) 23 43 6 trimethylphenol (d) 23 43 6trimethylphenol

. A cyclic hydrocarbon has a #ormula 5 1$C H . t #orms eight monobrominated specier (including stereoisomers) its

#ormula is

(a) (b) .

(c) (d) .

. 23 4heptadiene eists as stereoisomers.

(a) 2 (b) ! (c) 4 (d) 5

. n the complete combustion o# inclasse gas what change o# hybridi7ation does a c atom undergo

(a)!Sp Sp (b) ! 2Sp Sp (c) ! 2Sp dSp (d) 2Sp Sp

1$. 0hich o# the #ollowing cannot be the name o# !H C CN


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(a) Acetonitrile (b) 8ethyl cyanide (c) 8ethanenitrile (d) 9thanenitrile

11. rder o# bond length o# & in the #ollowing:

H3COH,H

HC = O and H C

O

Ois

(a) ; ; (b) ; ; (c) ; ; (d) ; ;

12. 8olecular #ormula o# an aromatic compound o# #ormula !C H O is a phenol3 an ether and an aldehyde3 number o#

structural isomers possible with bonding between


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1. &on#ormation o# butane viewed along the 1 2C C with dihedral angles oand 6$oare

(a) An eclipsed3 s*ew3 partially eclipsed and anti(b) An eclipsed and anti

(c) 9clipsed and s*ew

(d) 9clipsed partially eclipsed and anti

1. &on#ormational enantiomers have to be necessarily

(a) anti #orms (b) 9clipsed #orms

(c) partially eclipsed #orms (d) ,*ew (gauche) #orms

2$. ?witterions are species having a >ve charge at one end and a


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25.

CH2 O C C4H9

O

CH O C

O

C4H9

CH2 O C

O

C4H9

H2O

NaOH(a!

a s"a# $

B is

(a) A Cihydric alcohol with 80'62(b) A trihydric alcohol with 80'6$

(c) A trihydric alcohol with 80'2

(d) A trihydric alcohol with 80'2

26.-- + HO CH2 CH2 OH + HOOC COOH + HO CH2 CH2 OH + COOHCOOH +-----

-H2C CH2 O C

O

C

O

O

n

+ H2O

0hich is not true about this reaction

(a) t is an esteri#ication

(b) t is an condensation

(c) t is a polymeri7ation(d) +he 8w o# the product is an integral multiple o# the sum o# the molecular weights o# the reactants.

2. A secondary al*yl halide reacts with 2 5C H ONa which is both a sting base and a power#ul nucleophile is yield

(a) an ether (b) an al*ene (c) either o# the above (d) both o# the above

2.

%&'C na)e is

(a) 4ethenylheptane (b) 4Dinycheptane(c) !ethenylheptane (d) !(1propye)1haene

2. +owards aromatic electrophilic substitution the most reactive among the #ollowing is

(a) 2PhNH (b) 2.PhNH HCl (c) 2PhNO (d) !PhNHCOCH

!$. OH

CH3C*

lCl3

OH

CH3

+

OH

CH3

NH2NH2

CH3

+he di##erence is because o#

(a) +he acidic nature o# phenol (b) +he acidic nature o# aniline

(c) +he basic nature o# aniline (d)


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!1. Among an anide3 amine and an imide3 the increasing order o# basic nature is

(a) Amide inside amine (b) Amine inside amide

(c) inside amide amine (d) amine amide inside

!2. 6 5 2 6 5 2C H CH CH NH and C H CH CH NH = = are

(a) "osition isomers (b) chain isomers (c) 8etames (d) tantomers

Match the following81.

COLUMN I COLUMN II

&an undergo

A ! 2 !H C CO CH CO CH " &yclisation

E @@

! 2 !

(

CH C OCH CH F earrangement

& @@ @@

! 2 2 2

((

CH CH CH CH CH C OH 9nolisation

C

C6H5

CH3

C

OH

C

OH

C6H5

CH3

, 9limination

+ eduction

82.

COLUMN I COLUMN II

A C

C6H5

CH3

NOH " Ginear structure

E C

H

C C

CH3

Cl

H

F ptical activity

& C

Cl

C C

CH3

H

H

%eometrical isomerism

C C

H

C CCH3

H

H3C

, "lanarity

+ esonance ,tabilisation


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ANSWER KE!

1.& 2.& !.C 4.C 5.C

6.& .& .& .A 1$.&

11.C 12.& 1!.& 14.C 15.C

16.E 1.& 1.& 1.C 2$.C

21.& 22.E 2!.& 24.C 25.&

26.C 2.C 2.C 2.A !$.E

!1.& !2.C

81. A3 + E,3 + &"3 + CF

82. A3 + E" &"3 F C"3 ,

practice sheet (1)

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