rt solutions-22!01!2012 xiii vxy paper ii code a

7/30/2019 Rt Solutions-22!01!2012 XIII VXY Paper II Code A

1/17

Class: 13th (VXY) Date: 22/01/2012 Time: 3 Hours. Max. Marks: 243

VERY IMPORTANT

A. The question paper consists of 3 section (Section-1containsMathematics , Section-2contains Physicsand Section-3containsChemistry). Please fill the OMR answer Sheet accordingly and carefully.

B. Each Section contains (16 questions in Part-A, 1 question in Part-B and4 questions in Part-C) and

total number of pages are 32.C. Please ensure that the Question Paper you have received contains ALL THE QUESTIONS in

each Section and PAGES. If you found some mistake like missing questions or pages thencontact immediately to the Invigilator.

INSTRUCTIONS

PART-A

1. Q.1 to Q.8 are single correct type questions. Each question has four choices (A), (B), (C) and (D)out of which ONLY ONE is correct.ForQ.1 to Q.8, you will be awarded 3 marks, if you have darkened only the bubble corresponding tothe correct answer and zero mark if no bubble are darkened. In all other cases, minus one (1) markwill be awarded.

2. Q.9 to Q.14 are Paragraph type. Based upon the paragraph 3 single correct typequestions have to beanswered. Each of these questions has four choices (A), (B), (C) and (D) out of whichONLY ONE is correct.For each question, you will beawarded 3 marksif you have darkened only the bubble corresponding to the correctanswer andzero markif no bubble are darkened. In all other cases,minus one (1) markwill be awarded.

3. Q.15 & Q.16 are Reasoning type questions, contains Statement-1 (Assertion) and Statement-2(Reason). Each question has four choices (A), (B), (C) and (D) out of which ONLY ONE is correct.For each question you will be awarded 3 marks, if you have darkened only the bubble correspondingto the correct answer and zero mark if no bubble are darkened. In all other cases, minus one (1)mark will be awarded.

PART-B

4. Q.1 isMatrix Match type question. Each question hasThree statements (A, B, C ) given inColumn-IandFour statements (P, Q, R, S ) given inColumn-II. Any given statement inColumn-Ican have correct matchingwith one or more statement(s) given inColumn-II. For example, if for a given question, statement B matches withthe statement given in Q and R, then for the particular question, against statement B darken the bubbles correspondingto Q and R in the OMR.For Q.1, you will be awarded 3 marks for each row in which you have darkened the bubble(s)corresponding to the correct answer.

PART-C

5. Q.1 to Q.4 are Integer Type questions. The answer to each question is upto 4 digit ranging from0 to 9999. The correct digit below the question number in the OMR is to be bubbled.For each question, you will be awarded 6marks if you darken the bubble corresponding to the correctanswer and zero mark if no bubble is darkened.For example, if for a given question, your answer is 25, then for the particular question, against question

number you must fill as 0025 in the OMR.No negative marks will be awarded in this section.6. Indicate the correct answer for each question by filling appropriate bubble in your answer sheet.7. Use of Calculator, Log Table, Slide Rule and Mobile is not allowed.8. The answers of the questions must be marked by shading the circle against the question by darkBlack Ball

point Pen only.USEFUL DATA

Atomic weights: Al = 27, Mg = 24, Cu = 63.5, Mn = 55, Cl = 35.5, O = 16, H = 1, P = 31, Ag = 108, N = 14,Li = 7, I = 127, Cr = 52, K=39, S = 32, Na = 23, C = 12, Br = 80, Fe = 56, Ca = 40, Zn = 65.5, Ti = 48,Ba = 137, U = 238, Co= 59, B =11, F = 19, He = 4, Ne = 20, Ar = 40 , Mo = 96[Take : ln 2 = 0.69, ln 3 = 1.09, e = 1.6 1019, m

e= 9.1 1031 kg ]

Take g = 10 m/s2 unless otherwise stated

CODEAEVIEW TEST-6PAPER- II


2/17

MATHEMATICS

XIII (VXY) RT-6 [Paper-II] Code-A Page # 2

PART-A

[SINGLE CORRECT CHOICE TYPE]

Q.1 to Q.8 has four choices (A), (B), (C), (D) out of which ONLY ONE is correct.

Q.1 The value of definite integral dx1xtan3

3xtan12

0 2

2

is equal to

(A)12

+

3

1ln

32

13(B)

8

+

3

1ln

32

13

(C)12

3

1ln

32

13(D)

8

3

1ln

32

13

Q.2 The range of p R for which the equation 2x2 2(2p + 1)x + p(p + 1) = 0have one root less than p and other root greater than p, is

(A)

1 < p < 0 (B) p 0 (C) p 0 (D) p = 0

Q.3 If the cubic polynomial y = ax3 + bx2 + cx + d (a, b, c, d R) has only one critical pointin its entire domain and ac = 2, then the value of | b | is

(A) 2 (B) 3 (C) 5 (D) 6

Q.4 The number of ordered pair(s) (x, y) of real numbers satisfying the equation

1 + x2 + 2x sin (cos1 y) = 0, is

(A) 0 (B) 1 (C) 2 (D) 3

Q.5 The value of

x

a

t

ax

)0a(,dttsinte

ax

1Lim is equal to

(A) asine2

1 a(B) 2 asine a (C) asine

2

1 a(D) asine

2

1 a

Q.6 Number of ways in which 5 alike red balls and 6 alike green balls can be arranged so that

exactly two pairs of green balls are together, is

(A) 72 (B) 90 (C) 144 (D) 180

Q.7 If the trace of matrix A =

7xxtan0|x|n3xx)x(cos

xsine2x

1

22

x

l is zero, then x is equal to

(A)2 or 3 (B)3 or2 (C)3 or 2 (D) 2 or 3


3/17

MATHEMATICS


Q.8 Let S1

: x2 + y26x4y12 = 0 and S2

: x2 + y24x6y12 = 0

be two circles, then which one of the following statement is incorrect?

(A) S1

and S2

cut each other orthogonally.

(B) S1

and S2

have 2 common tangents.

(C) Equation of radical axis of S1

and S2

is xy = 0.

(D) The point (1,2) lies inside S1

but outside S2.

[PARAGRAPH TYPE]


Paragraph for question nos. 9 to 11

Common tangents are drawn to C1

: x2 + y2 = 16 and C2

: 4x2 + 25y2 = 100.

Q.9 The x-intercept of common tangent of curves C1

and C2

having negative gradient in the

first quadrant is

(A) 72 (B)3

74(C) 72 (D)

3

74

Q.10 Area of quadrilateral formed by common tangents between C1

and C2

is

(A)3

3142(B) 3

3

112(C) 3

3

92(D) 3

3

62

Q.11 If tangents are drawn from any point on director circle of C1

to auxiliary circle of C2,

then locus of mid-points of chords of contact is

(A) x2 + y2 =12

625(B) x2 + y2 =

24

625(C) x2 + y2 =

16

625(D) x2 + y2 =

32

625

Paragraph for question nos. 12 to 14Let F and G be two real-valued functions defined on R (the set of all real numbers).

Consider

0x,x

0x,1x)x(F ,

1x,2x

1x,1x)x(G

and H(x) = F(x) + G(x).

Q.12 Which one of the following statement is correct ?

(A) H(x) increases in (,1) and decreases in (1,).(B) H(x) decreases in (,1) and increases in (1, ).

(C) H(x) has local minimum at x = 1.(D) H(x) has local maximum at x = 1.

Q.13 Number of points of discontinuity of H(x) are

(A) 0 (B) 1 (C) 2 (D) 3

Q.14 The value of definite integral

2

2

dx)x(H is equal to

(A) 4 (B) 7 (C) 8 (D) 12


4/17

MATHEMATICS


[REASONING TYPE]

Q.15 & Q.16 has four choices (A), (B), (C), (D) out of which ONLY ONE is correct.

Q.15 Let f(x) = (x2 + x2) (x2 + 2x3), x R.Statement-1: f(x) has local extremum at x = 1.

Statement-2: f(x) is differentiable for every x R and f ' (1) = 0.(A) Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.

(B) Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.

(C) Statement-1 is true, statement-2 is false.

(D) Statement-1 is false, statement-2 is true.

Q.16 Statement-1: If CandB,A

are three non-zero and non-coplanar vectors, then the vectors

ACCBBA

and CBA

are perpendicular vectors.

Statement-2: If qandp

are two non-zero vectors such that qp

= 0, then p

is perpendicular to q

.

(A) Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.




PART-B

[MATRIX TYPE]

Q.1 has three statements (A, B, C) given in Column-I and four statements (P, Q, R, S) given in Column-II.

Any given statement in Column-Ican have correct matching with one or more statement(s) given inColumn-II.

Q.1 Column-I Column-II

(A) Line y = x + 2 is a tangent to the parabola y2 = 8x. Let M be (P) 1

the point on this line, the other tangent from which is perpendicular

to this tangent. The distance of M from N(1, 2 2 ) is equal to (Q) 2

(B) Let P be the point on ellipse x2 + 2y2 = 6, whose distance from line

x + y = 7 is least. The distance of P from Q(2, 1) is equal to

(C) The foci of ellipse 19

y

25

x 22 are S and S'. Let P be a point on (R) 3

ellipse whose eccentric angle is3

. The distance of incentre of triangle (S) 4

SPS' from

3

2,0 is equal to


5/17

MATHEMATICS


PART-C

[INTEGER TYPE]

Q.1 to Q.4 are "Integer Type" questions. (The answer to each of the questions are upto 4 digits)

Q.1 Determine the total number of local maxima and local minima of the function

f(x) =

x2cos(x + 3) + 2

1

sin(x + 3), where 0 < x < 4.

Q.2 Let P be a point on the plane x + y + z = 6 where the line passing through the points A(1, 0, 1) and

B(4,2, 2) intersects the plane. If the shortest distance of the point P from the line of intersection of

the planes x + y + z = 1 and x + z = 0 is d , where d N then find d.

Q.3 If P be the rth term when n arithmetic means are inserted between 5 and 100 and Q be the

rth term when n harmonic means are inserted between 5 and 100, then find the value of

Q

100

5

P.

Q.4 Given p, q {0, 1, 2, 3, 4, ......., 19, 20}. Consider the system of equationsx + y + z = 4

2x + y + 3z = 6

x + 2y + pz = q

Let L: denotes number of ordered pairs (p, q) so that the system of equations has unique solution,

M: denotes number of ordered pairs (p, q) so that the system of equations has no solution and

N: denotes number of ordered pairs (p, q) so that the system of equations has infinite solutions.

Find (L + MN).


6/17

PHYSICS


PART-A



Q.1 In Fig. denote the numerical values of resistors in SI.

The total resistance of the circuit

a b

50

420

30

16

3

2 20

15(A) 12 ohms

(B) 24 ohms.

(C) 15 ohms

(D) 6 ohms

Q.2 Fig. shows two magnetic field lines of a long conductor, located

perpendicular to the plane of the figure carrying inward current. In which

one of the points A, B, C, D vector of the magnetic field B to the right

and has the lowest magnitude.A

C

B

D

(A) A (B) B

(C) C (D) D

Q.3 An LC circuit consists of inductance coil and a capacitor. At the initial time t = 0 capacitor is not

charged, the initial value of the current through the coil is not equal to zero. After the closure of the circuit

charge oscillates with period T. The energy of the electric field in the capacitor reaches a maximum value

at time

(A) T/2, T, 3T/2 (B) T/4, 3T/4, 5T/4 (C) T/4, 5T/4, 9T/4 (D) T/2, 3T/2, 5T/2

Q.4 A stream of liquid, set at an angle, is directed against a plane

surface (figure). The liquid, after hitting the surface, spreads over

it. Find the pressure on the surface. The density of the liquid is

and its velocity is v.

va

(A)v2 cos (B)v2 cos2

(C)2

1v2 cos (D)

2

1v2 cos2

Q.5 A conducting loop is halfway into a magnetic field. Suppose the magnetic field begins to increase rapidly

in strength. What happens to the loop ?

B

(A) The loop is pushed upward, toward the top of the page.

(B) The loop is pushed downward, toward the bottom of the page.

(C) The loop is pulled to the left, into the magnetic field.

(D) The loop is pushed to the right, out of the magnetic field.Q.6 Comment on the magnetic field.

B

Induced E

(A) Increasing (B) Decreasing (C) Constant (D) Cannot be predicted


7/17

PHYSICS


Q.7 Rank in order, from largest to smallest, the angular acclerations1

to3.

(1)

2kg

1N2kg

2m

1N

(2)

2kg

1N2kg

4m

1N

(3)

2kg

2N2kg

4m

2N

30

30

(A) 1

< 2

= 3

(B) 1

> 2

= 3

(C) 1

> 2

> 3

(D) 2

> 1

> 3

Q.8 The figure shows volume flow rates (in cm3/s) for all but one tube. What is the volume flow rate through

the unmarked tube ? Is the flow direction in or out ?

?

10 1

2 8

4

Flows in cm /s3

(A) 3 cm3/s out (B) 1 cm3/s out (C) 2 cm3/s out (D) 1 cm3/s in

[PARAGRAPH TYPE]



Like many other galvanometers, a ballistic galvanometer has a

coil which rotates between magnets. The ballistic galvanometer

has the special feature that its rotating coil has a large moment

of inertia. It is used to measure quantity of charge rather than

currents, for the large moment of inertia permits the passage of

a quantity of charge before the coil moves significantly. The

passage of the charge produces an impulse, a momentary torque,

which causes the coil then to swing to some maximum position.

For the ballistic galvanometer, the damping is made negligible.

Such a galvanometer was often used to standardize capacitors.

Galvanometer

Standard Capacitor

Standard Cell

+

Before first use the ballistic constant of the galvanometer must be determined. This is usually done by

connecting to the galvanometer a known capacitor, charged to a known voltage and recording the

deflection. The constant K is calculated from the capacitance C, the voltage V and the deflection .

K = CV /

where K is expressed in coulombs per degree. In operation the unknown quantity of charge Q (in

coulombs) is simply : Q = K.

[Take torsional constant of wire as C, moment of inertia of coil as I, number of turns of coil as N, area ofcoil as A and magnetic field as B.]

Q.9 As the coil swings

(A) its angular velocity increases but angular acceleration decreases.

(B) its angular velocity decreases but angular acceleration increases.

(C) its angular velocity as well as angular acceleration increases.

(D) its angular velocity as well as angular acceleration decreases.


8/17

PHYSICS


Q.10 A standard capacitor with charge Q is connected to a galvanometer the maximum deflection is. Now

identical uncharged capacitor is connected across galvanometer and a charge Q is given to left plate.

The maximum deflection will be

(A)2

(B) (C) 2 (D) 4

Q.11 What is constant K in terms of parameters of galvanometer coil

(A) INAB

C

(B) I

CNAB

(C) 222 BAIN

C

(D) I

BACN 222


Blood pressure is measured with a sphygmomanometer (figure). The oldest kind of sphygnomanometer

consists of a mercury manometer on one side attached to a closed bag-the cuff. The cuff is wrapped

around the upper arm at the level of the heart and is then pumped up with air. The manometer measures

the gauge pressure of the air in the cuff.

At first, the pressure in the cuff is higher than the systolic pressure-the maximum pressure in the bronchial

artery that occurs when the heart contracts. The cuff pressure squeezes the artery closed and no blood

flows into the forearm. A valve on the cuff is then opened to allow air to escape slowly. When the cuff

pressure decreases to just below the systolic pressure, a little squirt of blood flows past the constrictionin the artery with each heartbeat. The sound of turbulent blood flow past the constriction can be heard

through the stethoscope.

As air continues to escape from the cuff, the soundof blood flowing through the constriction in the artery

continues to be heard. When the pressure in the cuff reaches the diastolic pressure in the arterythe

minimum pressure that occurs when the heart muscle is relaxedthere is no longer a constriction in the

artery, so the pulsing sounds cease. The gauge pressure for a healthy heart are nominally around 120

mmHg (systolic) and 80 mmHg (diastolic). Take atmospheric pressure as 760 mmHg. specific gravity of

mercury as 13.6 (approx.)

Q.12 The cuff pressure when the sound of turbulent blood flow is heard in case of a healthy heart is

(A) 120 mmHg (B) 80 mmHg (C) 880 mmHg (D) 840 mmHg

Q.13 An IV fluid bottle is connected to a patient's vein. The blood pressure in the vein has a gauge pressure

of 12 mmHg. At least how far above the vein must the IV bottle be hung in order for fluid to flow into the

vein ? Assume the fluid in the IV has the same density as blood.

(A) 12 mm (B) 163.2 mm (C)6.13

12mm (D) 12 cm

Q.14 In case of a healthy heart, what is approx. maximum pressure of blood in foot which is 1m below heart.

Take density of blood equal to that of water and specific gravity of mercury as 13.6

(A) 160 mmHg (B) 920 mmHg (C) 950 mmHg (D) 1000 mmHg


9/17

PHYSICS


[REASONING TYPE]

Q.15 & Q.16 has four choices (A), (B), (C), (D) out of which ONLY ONE is correct.

Q.15 Statement-1 : The gauss law for magnetism states that 0AdB

.

Statement-2 : Magnetic monopoles do not exist.





Q.16 Statement-1 : If we touch the steam coming out of a blowing whistle of a pressure cooker, water

vapour is cooler than 100C.

Statement-2 : During an adiabatic expansion, the temperature of gas falls.





PART-B[MATRIX TYPE]

Q.1 has three statements (A, B, C) given in Column-I and four statements (P, Q, R, S) given in Column-II.

Any given statement in Column-Ican have correct matching with one or more statement(s) given in Column-II.

Q.1 Column-I Column-II

(A) Bernoulli's Theorem (P) Law of conservation of charge

(B) Kirchoff's loop law (Q) Law of conservation of angular momentum

(C) Kepler's second law (R) Law of conservation of linear momentum

(S) Law of conservation of energy

PART-C

[INTEGER TYPE]


Q.1 A circular disk of radius R with uniform charge density rotates with an angular speed. Show that the

magnetic field at the center of the disk is B = R 0/n. Fill n in the OMR sheet.

Q.2 In the circuit (Figure), E = 5 V, r= 1 ohm, R

2= 4 ohms, R

3= 3 ohms and C = 3 F. Find the charge on

the plates of capacitor A (inC).

C C

C C

R1

R2

R3

r

A


10/17

PHYSICS


Q.3 A horizontal pipe has a cross section of 10 cm2 in one region and of 5 cm2 in another. The water velocity

at the first is 5 ms1 and the pressure in the second is 2 105 Nm2. Find the pressure of water in 1st

region (in 102 Pa).

Q.4 The drawing shows a top view of a frictionless horizontal surface, where there are two springs with

particles of mass m1and m

2attached to them. Each spring has a spring constant of 1200 N/m. The

particles are pulled to the right and then released from the positions shown in the drawing. How much

time passes before the particles are side by side for the first time at x = 0m if m1= 3 kg and m

2= 27 kg.

If time is80

nsec, fill n in OMR sheet.

Position ofunstrained

spring

(x = 0)


11/17

CHEMISTRY


PART-A



Q.1 Let solubility of a sparingly soluble salt of strong base and weak acid in pure water is equal to s1 , in a

buffer solution with pH < 7 is equal to s2 and in another buffer solution with pH > 7 is equal to s3 . If

hydrolysis is considered in all the solutions then the correct relation between s1, s2ands3 is :(A) s

1= s

2= s

3(B) s

1> s

2> s

3(C) s

1< s

2< s

3(D)

s

2> s

1> s

3

Q.2 Which of the following is not the similar property between P4O

10and P

4O

6?

(A) Both have pd bond.

(B) Equal number of POP linkages.

(C) Four 'P' atoms are sp3 hybridised.

(D) 'd' orbital is involved in the formation of hydrolysis product.

Q.3O N2

H

H

O

O

/HO

(A)O N2

OH

COO(B)

O N2OH

COO

(C)O N2 O N2COO

CO

O

&

OH

OH

(D) None of these

Q.4 Structure of N2O is N = N = O. Calculate bond enthalpy of N = N bond in N

2O.

Given :

ON,f 2

H = 100 kJmol1

NNBE

= 950 kJmol1

ONBE

= 600 kJmol1

OOBE = 500 kJmol1

and resonance energy of N2O =100 kJ mol1

(A) 500 kJmol1 (B) 450 kJmol1 (C) 400 kJmol1 (D) 420 kJmol1

Q.5 Poling process is used in the purification of :

(A) Sn (B) Cu (C) both (D) None


12/17

CHEMISTRY


Q.6 Consider the elementary reaction :

A

B

C

k1

k2

Given : k1 = k2 = 20

2lnmin1. A, B and C all are optically active compound. If optical rotation per unit

concentration of A, B and C are 60,40 and80 and initial concentration of A is 1M, then time at

which reaction mixture will be optically inactive is :

(A) 100 min (B) 15 min (C) 25 min (D) 10 min

Q.7 (i) LAH

SBH/EtOH

(ii) H O2(A)

(B)

O NH

O

O

(A) and (B) are

(A)OO NHNH

OHO

O

&(B)

OO NHNH

O

O

&

(C)OO NHNH

HOHO

O

&(D)

OO NHNH

HO O

&

Q.8 Select the incorrectstatement :

(A) Oxidation potential of Hydrogen electrode will increases with increase in partial pressure of hydrogen

gas if other parameters are kept constant.

(B) Boron and Cadmium are very good neutron absorber and are used in control rods of a nuclear

reactor.

(C) All exothermic reactions are accompanied by decrease of entropy.

(D) The oxidation state of Sulphur in S2O

82is +6.


13/17

CHEMISTRY


[PARAGRAPH TYPE]


ONLY V-GROUP :


(A) + K Cr O + conc. H SO2 2 7 2 4Salt solid

NaOH

(E)

HCl

White fumes

(A)

(B)Orange red fumes

NaOH

(C)

yellow solution

CH COOH3(CH COO) Pb3 2

(D)

yellow ppt

gas

Q.9 What will be the hybridisation of central atom in compound (B), (C) and (D)?

(A) sp2 (B) sp3d2 (C) d2sp3 (D) d3s

Q.10 BaCl2

+ (C) (X)

For (X) which option is correct?

(A) X is soluble in NaOH (B) X is a yellow coloured compound

(C) X is amphoteric in nature (D) In X theve ion is octahedral

Q.11 Salt (A) + AgNO3

.pptwhite

)Y( OH)E( 2

)solutionlelubso(

)Z( 3HNO

)pptwhite(

)Y(

What will the hybridisation of central atom in complex (Z)?

(A) sp3d2 (B) d2sp3 (C) sp3 (D) sp


14/17

CHEMISTRY


ONLY XY-GROUP :


For extraction of Cu from 2CuFeS2 (OR) 322 SFeSCu

Pulverisation

Froth floatation

Roasting

Smelting

Copper matte

Bessemerisation process

Blister Copper

Poling

Electrolysis gives 99.99% 'Cu'

Q.9 During poling which of the following is produced as impurity which is reduced by hydrocarbon gas ?

(A) Cu2S (B) Cu

2O (C) CuFeS

2(D) FeS

Q.10 In Bessemerisation process reducing agent is :

(A) Cu2S (B) SO

2(C) C (D) SiO

2

Q.11 Choose the correct statement(s) when roasted copper pyrite is heated in a smelter.

(A) SiO2

is used as flux (B) FeSiO3

slag is obtained

(C) This process is pyro metallurgical (D) All the above are correct.


C

NOH

H+

(i) LAH

(i) MeMgX

(ii) H /H O+

2

CHCl /OH3(ii) H O2

(A) (B)

(D)

(C)

H

Q.12 A can be prepared by

(A)

O||

ClCPh + NH3 (B)

O||

NHCPh 2

52OP

(C)

Cl

KCN.aq (D)

C N

hydrolysisPartial


15/17

CHEMISTRY


Q.13 Which statement is incorrect about D?

(A) D can produce yellow ppt. on reaction with HO

/ I2

(B) D can be prepared by PhC CH on reaction with Hg2+ / H+ / H2O

(C) D can form geometrically isomeric oxime on reaction with NH2OH

(D) D can be converted into alcohol on reaction with Zn(Hg) / HCl.

Q.14 Which gas is evolved when B reacts with HNO2

(A) NO (B) N2O (C) N

2(D) CO

2

[REASONING TYPE]


Q.15 Statement-1 : By electrolysis of aqeous solution of Na2SO4 using inert electrode, Na is obtained at

cathode.

Statement-2 : Discharge potential of Na+ is greater than H+.



(C) Statement-1 is true, statement-2 is false.(D) Statement-1 is false, statement-2 is true.

Q.16 Statement-1 :

CH2

NH C3 CH3

(I)

is more stable resonating structure than

CH2

N

H C3 CH3(II)

Statement-2 : Structure I contains benzenoid ring while structure II has non benzenoid ring.






16/17

CHEMISTRY


PART-B

[MATRIX TYPE]

Q.1hasThree statements (A,B,C) given in Column-I andFour statements (P, Q, R, S) given in Column-II.

Any given statement in Column-Ican have correct matching with one or more statement(s) given in Column-II.

Q.1 Column I Column II

(Reactant) (Product, on Ozonolysis)

(A) (P)O

(B) (Q)O

(C)

H

(R)

O||

HCCH3

(S)O

PART-C

[INTEGER TYPE]


Q.1 When equal volume of 0.2 M AgNO3

and 1M KCN solutions were mixed then at equilibrium,

concentration of Ag+ was found to be 106 M. While when equal volume of 0.2 M Zn(NO3)2

solution

and of 1M KCN solution were mixed then at equilibrium, concentration of Zn2+ ion was found to be

1012 M. Then find the equilibrium constant of the following reaction.

2[Ag(CN)2](aq) + Zn2+(aq) [Zn(CN)

4]2(aq) + 2Ag+(aq)

Q.2 How many of the following are paramagnetic havingspin

(Magnetic moment) 2.8 BM ?

N2

, O2

, B2

, C2

, C22+ , N

22 , F

2, O

2 , Li

2+, B

2

If your answer is 2, write the answer as 0002.

Instruction for Q.3

Partial Marks (+1) will be awarded for correct value of each 'a','b','c' & 'd'.

Q.3 Calculate 'abcd'

'a' = pH at which Mg(OH)2 begins to precipitate from a solution containing 0.1M Mg2+

ions.[ Given : 11

)OH(Mg,sp10K

2

]

'b' = (HU) in kJ for the reaction 2CO(g) + O2(g) 2CO

2(g) occuring in a rigid vessel of 1L

capacity in which pressure changes from 70 bar to 40 bar.

'c'= Order of reaction in which half life is directly proportional to initial concentration.

'd' = Number ofparticles emitted when U23892

changes into radioactive Pb20682

.


17/17

CHEMISTRY

XIII (VXY) RT 6 [Paper II] Code A Page # 17

Q.4 For compound

O

OH

OH

HCC

OH(i) Number of functional group (x) (except C = C and C C)

(ii) Number of functional group which can react with Na (y)(iii) Number of functional group which can react with NaOH (z)

(iv) Number of functional group which can react with NaHCO3(w)

then xyzwwill be

rt solutions-22!01!2012 xiii vxy paper ii code a

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