FINAL TEST XII (AB

7/30/2019 FINAL TEST XII (AB

1/24

Class: XII (AB) & SMS Date: 06-01-2013 Time: 3 Hours. Max. Marks: 270

VERY IMPORTANT

A. The question paper consists of 3 section (Section-1contains Mathematics, Section-2contains Physics and Section-3

contains Chemistry). Please fill the OMR answer Sheet accordingly and carefully.

B. Each Section contains (30 questions in Part-A) and total number of pages are 24.

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 then contact immediately to the

Invigilator.

INSTRUCTIONS

PART-A

1. Q.1 to Q.27 are single correct type questions. 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

corresponding to the correct answer and zero mark if no bubble are darkened. In all other cases, minus one (1)

mark will be awarded.

2. Q.28 to Q.30 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 willbe awarded 3 marks, if you have darkened only the bubble corresponding to the correct answer and zero mark if

no bubble are darkened. In all other cases, minus one (1) mark will be awarded.

3. Indicate the correct answer for each question by filling appropriate bubble in your answer sheet.

4. Use of Calculator, Log Table, Slide Rule and Mobile is not allowed.

5. The answers of the questions must be marked by shading the circle against the question by darkBlack Ball point Pen only.

FINAL TESTPAPER - 1 (JEE MAINS)

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, me= 9.1 10

31 kg ]Take

0= 8.85 1012 , g = 10 m/s2 unless otherwise stated


2/24

XII (AB) FINAL TEST [Paper-1_MAINS] Page # 2

MATHEMATICS

SPACE FOR ROUGH WORK

PART-A

[SINGLE CORRECT CHOICE TYPE]

Q.1 to Q.27 has four choices (A), (B), (C), (D) out of which ONLY ONE is correct.

Q.1 If the value of the definite integral dx1x1

xsin24

24

4

is equal to k, then the value of k is

(A) 2 (B) 22 (C) 24 (D) 28

Q.2 If z1=

4sini

4cos2 and z2 =

3sini

3cos3 , then | z1 z2 | is equal to

[ Note : i = 1 ]

(A) 6 (B) 32 (C) 6 (D) 5

Q.3 Tangent to the ellipse 118

y

32

x22

having slope4

3meet the coordinate axes in A and B.

The area ofAOB (O is origin) equals(A) 12 (B) 8 (C) 24 (D) 32

Q.4 In which one of the following functions, Rolle's theorem is applicable?

(A) f(x) = | x |, in 2 x 2 (B) f(x) = tan x, in 0 x

(C) f(x) = 1 + 32

)2x( , in 1 x 3 (D) f(x) = x(x2)2 in 0 x 2


3/24


MATHEMATICS


Q.5 A house of height 100 m subtends a right angle at the window of an opposite house. If the height of the

window is 64 m, then the distance between the two houses is

(A) 48 m (B) 36 m (C) 54 m (D) 72 m

Q.6 If the area of triangle on the argand plane formed by the complex numbers z, iz, z iz

(z 0 and i = 1 ) is 600, then | z | is equal to

(A) 10 (B) 20 (C) 30 (D) 40

Q.7 The distance between the origin and the normal to the curve y = e2x + x2 at x = 0, is

(A)5

1(B)

5

2(C)

3

2(D)

2

1

Q.8 A common tangent to 9x216y2 = 144 and x2 + y2 = 9, is

(A) y =7

15x

7

3 (B) y =

7

15x

7

23

(C) y = 2 715x7

3 (D) y =

7

15x

7

3

Q.9 Let p be the statement '7 is not greater than 4' and q be the statement 'Paris is in France'.

Then ~ (p q) is the statement(A) 7 is greater than 4 or Paris is not in France (B) 7 is not greater than 4 and Paris is not in France

(C) 7 is greater than 4 and Paris is in France (D) 7 is greater than 4 and Paris is not in France

Q.10 Let f (t) = t2 for 0 t 1 and g (t) = t3 for 0 t 1. The value of c with 0 < c < 1

at which)c('g

)c('f

)0(g)1(g

)0(f)1(f

, is

(A)3

2(B)

3

1(C)

2

1(D)

6

1


4/24


MATHEMATICS


Q.11 Let A and B be two events such that )BA(P =6

1, P(AB) =

4

1and )A(P =

4

1, where A stands

for complement of event A. Then, events A and B are

(A) mutually exclusive and independent. (B) independent but not equally likely.

(C) equally likely but not independent. (D) equally likely and mutually exclusive.

Q.12 If the area of auxiliary circle of the ellipse2

2

2

2

b

y

a

x = 1 (a > b) is twice the area of the ellipse,

then the eccentricity of the ellipse is

(A)2

1(B)

2

3(C)

3

1(D)

2

1

Q.13 If I =

1

0 2x1

dx, then

(A) loge2 < I I (C) I =

4

(D) I = log

e2

Q.14 The figure show a AOB and the parabola y = x2.The ratio of the area of the AOB to the area of theregion AOB of the parabola y = x2, is equal to

O(0,0)

A(a, a )2

y

x

B(a, a )2

(A)4

3(B)

5

3

(C)65 (D)

32


5/24


MATHEMATICS


Q.15 If x1, x

2, ........., x

18are observations such that

18

1j

j 9)8x( and

18

1j

2j 45)8x( ,

then the standard deviation of these observations is

(A)

34

18(B) 5 (C) 5 (D)

2

3

Q.16 If xdy = y(dx + ydy), y(1) = 1 and y(x) > 0, then y(3) is equal to

(A) 1 (B) 2 (C) 3 (D) 4

Q.17 The function f(x) =xcosxsin1

xcosxsin1

is not defined at x = . The value of f(), so that f(x) is

continuous at x = , is

(A)2

1(B)

2

1(C) 1 (D)1

Q.18 The set S = {x R: cos 2x + 2cos2 x = 2}, is equal to

(A)

In:3

n2 (B)

In:6

n (C)

In:3

n (D)

In:3

n2

Q.19 The locus of P(z) where z = x + iy and satisfying

1z

2zRe = 0 is

(A) {(x, y) R2 {(1, 0)}| x2 + y23y + 2 = 0}

(B) {(x, y) R2

{(0, 1)} | x

2

+ y2

3x + 2 = 0}(C) {(x, y) R2{(0, 1)} | x2 + y2 + 3x + 2 = 0}(D){(x, y) R2{(1, 0)} | x2 + y23x + 2 = 0}


6/24


MATHEMATICS


Q.20 Hat W contains two white balls and one black ball. Hat B contains two black balls and one white ball.

At random, one of the following strategies is selected :

Two different balls are drawn from hat W.

Two different balls are drawn from hat B.

One ball is drawn from each hat.

The probability of getting at least one white ball, is

(A)21 (B)

41 (C)

2722 (D)

2721

Q.21 Let y = f(x) satisfies the differential equation (1 + x2)dx

dy+ 2xy = 2x and f(0) = 2.

Then the number of integers in the range of f(x) is

(A) 1 (B) 2 (C) 3 (D) 4

Q.22 On the set N of all natural numbers, define the relation R by a R b if and only if the greatest common

divisor of a and b is 2, then R is

(A) reflexive but not symmetric (B) symmetric only

(C) reflexive and transistive (D) equivalence

Q.23 Let a, b, c be non-zero real numbers. If the system of equations

y + z = a + 2x

x + z = b + 2y

x + y = c + 2z

is consistent and b = 4a +4

c, then the absolute value of sum of roots of the equation ax2 + bx + c = 0,

is equal to

(A) 1 (B) 2 (C) 3 (D) 4

Q.24 Let the term independent of x in the expansion of

92

x

1x

has the value p andq be the sum of the

coefficients of its middle terms, then (pq) equals

(A) 0 (B) 2 9C4

(C) 9C5

(D) 9C3


7/24


MATHEMATICS


Q.25 Consider the ten numbers

ar, ar2, ar3, .......... ar10.

If their sum is 18 and the sum of their reciprocals is 6 then the product of these ten numbers, is

(A) 324 (B) 343 (C) 243 (D) 729

Q.26 Let matrix A of order 3 is such that A2 = 2A I where I is an identity matrix of order 3.

Then for n

N and n

2, A

n

is equal to(A) nA(n1)I (B) nAI (C) 2n1 A(n1)I (D) 2n1 AI

Q.27 If the derivative of the function f(x) is everywhere continuous and is given by

f(x) =

1x;bax

1x;4axbx2

2

, then

(A) a = 2, b = 3 (B) a = 3, b = 2 (C) a =2, b =3 (D) a =3, b =2

[REASONING TYPE]


Q.28 Statement-1: The value of )xtanx()2x(tan)2x(Lim11

x

is equal to .

Statement-2: If f(x) is derivable in [a, b] then atleast one c (a, b) such that

f '(c) =ab

)a(f)b(f

.

(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


8/24


MATHEMATICS


Q.29 Statement 1: Consider two curves

C1

: 0bziizzz

and C2

: 04z)i1(z)i1(zz where (b R, z = x + iy and i = 1 ).If C

1and C

2intersects orthogonally then b =2.

Statement 2: If two curves intersects orthogonally then the angle between the tangents at all their

points of intersection is2

.





Q.30 Statement 1: The circles x2 + y2 = 9 and 06yy21x3x2 touches each otherinternally.

Statement 2: Circle described on the focal distance as diameter of the ellipse 8x2 + 9y2 = 72touches the auxiliary circle x2 + y2 = 9 internally.






9/24

XII (AB) FINAL TEST [Paper-I_MAINS] Page # 9

PHYSICS


PART-A



Q.1 Time taken by the planet to cover path A B C is t1 & time taken by the planet to cover path C D A is t2.

D

C

B

A

A2

A1SUN

Planet

(A) t1= t2 (B) t2> t1 (C) t1> t2 (D) cannot be determined

Q.2 A beam of light of wavelength 400nm and power 1.55mW is directed at the cathode of a photoelectric

cell. If only 10% of the incident photons effectively produce photoelectrons, find the current (approxi-

mate value) due to these electrons.

(A) 20 A (B) 50 A (C) 200 A (D) 500 A

Q.3 In which of the following cases, we would obtain an output of one.

x

y z Output

(A) x = 1, y = 1, z = 1 (B) x = 1, y = 1, z = 0

(C) x = 0, y = 1, z = 1 (D) x = 0, y = 0, z = 1

Q.4 The wavelength of the characteristic X-ray K line emitted by a target element is 0.32 . What wouldthe wavelength of the K line emitted by the same element?

(A) 0.37 (B) 0.57 (C) 0.27 (D) 0.13


10/24


PHYSICS


Q.5 Find the power dissipated in the circuit if the circular wire and its diameter has a resistance per unitlength. The radius of circle is a. The connecting wires are resistanceless.

(A)a

V22

(B)a2

V2

(C) a2a2

V2

(D) aa

V2

Q.6 Find the magnetic field at point O. Here curved part of wire has radius a & straight part of wire is very

long.

(A)

4

11

a

i0(B)

4

11

a2

i0(C)

4

12

a

i0(D)

4

11

a2

i0

Q.7 A thin convex lens forms an image of a point object kept on its principal axis. The object is 50 cm away

from the lens and image is also 50 cm away from the lens. If a glass slab ( = 1.5, thickness = 6 cm) isplaced between the object and the lens, the image shifts by :

(A)23

50cm away (B)

23

25cm away (C)

23

50cm towards (D) none of these


11/24


PHYSICS


Q.8 A block of mass m is kept on a rough inclined plane with coefficient of friction. The force required tojust move the block up is

F

(A)mg cos (B) mg sin(C) mg sin + mg cos (D) mg sin mg cos

Q.9 A particle is executing SHM with amplitude A. The displacement of the particle from the mean position

when its kinetic energy is equal to its potential energy is

(A)2

A(B)

2

A(C)

2

A3(D) A

Q.10 An x-ray tube is operating at a voltage V. Which of the following wavelengths depend on V

(A) k x-ray (B) k x-ray(C) minimum wavelength (D) maximum wavelength

Q.11 The critical angle of incidence for light travelling from medium A to B is. If the speed of light in mediumA is v, then the speed in medium B is

(A) v sec (B) v sin (C) v cosec (D) v cos

Q.12 In a series LCR circuit connected to AC source, the power factor is 1. The angular frequency is 100rad/s. The inductance is 4H, the resistance is 100. Then the capacitance is(A) 2.5 F (B) 5 F (C) 4 F (D) 8 F

Q.13 If magnetic field in space is iT1 , electric field is iC/N10 , no gravitational field is present and a charged

particle is released from rest from origin, it will

(A) not move at all (B) move in a circular path

(C) move in a helical path (D) move on a straight line


12/24


PHYSICS


Q.14 A short circuited coil is kept on the ground and a magnet is

dropped on it as shown. The coil shows (when viewed from top)

(A) anticlockwise current that increases in magnitude

(B) anticlockwise current that remains constant

N

S

(C) clockwise current that remains constant

(D) clockwise current that increases in magnitude

Q.15 In an LR circuit shown below, at t = 0 switch is put on. the time after which the current becomes 1

ampere is 4H

43V

(A) ln3 sec (B)2

3lnsec. (C) 3ln2 sec. (D) never

Q.16 In a YDSE experiment= 540 nm, D = 1m, d = 1mm. A thin transparent film is pasted on upper slit and

the central maxima shifts to the point just in front of the upper slit. What is the effective path difference (inair) at the centre of the screen ?

(A) 540 nm (B) 270 nm (C) 500 nm (D) 810 nm

Q.17 A freshly prepared sample of a certain radioactive isotope has an activity of 9.0 mCi. After 4.00 h, its

activity is 4.5 mCi. Find the half life.

(A) 8 hr (B) 16 hr (C) 4 hr (D) 24 hr

Q.18 A ball of mass m is revolving in a circle of radius R. It is connected to another ball of same mass hanging

vertically. If the hanging ball is in equilibrium, angular velocity of mass is

(A)g

R(B)

R

g

m

m

(C)g

R2(D) gR


13/24


PHYSICS


Q.19 The interaction potential energy of a diatomic molecule is given by U = 12r

A 6r

B. A and B are positive

constants. The distance r between them at equilibrium is

(A)

6/1

B

A

(B)

6/1

B

A2

(C)

6/1

B2

A

(D) None of these

Q.20 A particle of mass m moves towards a smooth vertical wall with speed u. The wall is moving with speed

2u in opposite direction. The collision is head on elastic. The magnitude of impulse delivered to the

particle is

(A) 3 mu (B) 4 mu (C) 5 mu (D) 6 mu

Q.21 An air bubble of radius r rises steadily through a liquid of densitywith velocity v. The coefficient ofviscosity of liquid is

(A)

v

gr

9

2 2(B)

v

gr

9

2 2

(C) 2r

gv

9

2 (D) 2

vr

g

9

2

Q.22 A tuning fork of frequency 330 Hz is used to excite a resonance column. If speed of sound is 330 m/s,

length of resonance column at 1st resonance.

(A) 25 cm exactly (B) slightly less than 25 cm

(C) slightly more than 25 cm (D) slightly less than 50 cm

Q.23 A wave y = 3 cm sin

100

x2t4 passes through a region. The maximum velocity of the particle of the

medium is given by (here t is in sec & x is in meter)

(A) 12 cm/s (B) 43

cm/s (C) 200 m/s (D) 0.5 cm/s


14/24


PHYSICS


Q.24 A cube of side a is pulled at the top as shown. At what value of F will it topple. Assume surface is so

rough that it does not slide.

mass

m

F

(A) mg (B) mg/2 (C) 2mg (D) 3mg/2

Q.25 A wire of linear mass density is being rotated about an axis passing through O and perpendicular to theplane. Its moment of inertia is :

R

R RO

(A)

3

14R3 (B)

3

8R3 (C)

3

2R3 (D)

3

5R3

Q.26 If temperature versus density graph is a rectangular hyperbola, the process is (consider ideal gas &

number of moles of gas is constant).

(A) Isobaric (B) Isochoric (C) Adiabatic (D) Isothermal

Q.27 A certain radioactive sample is observed to undergo 10000 decays in 10 sec. In which of the following

cases can we say that decay rate during this time interval is approximately constant and equal to 1000

dps.

(A) t1/2

= 10 sec (B) tmean

= 10 sec (C) t1/2

>> 10 sec (D) t1/2


15/24


PHYSICS


Q.29 Statement-1 : When a body rolls without slipping over a rough horizontal ground (without any net

external force), friction acting on it is not zero.

Statement-2 : When a body slips on rough ground, friction acting on it is kinetic.




(D) Statement-1 is false, statement-2 is true.Q.30 Statement-1 : If we want to cross a uniformly flowing river in shortest time, we should swim (w.r.t.

river flow) in a direction perpendicular to river flow.

Statement-2 : Velocity is a vector and motion in x and y direction are independent of each other.




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


16/24

CHEMISTRY



PART-A



Q.1 What happens when lyophillic sol is added to a lyophobic sol?

(A) A film of lyophillic sol is formed over lyophobic sol and lyophobic sol is stabilized.

(B) Lyophobic sol gets coagulated.

(C) Lyophillic sol gets coagulated.

(D) Lyophillic sol gets protected by the lyophobic sol.

Q.2 Which of the following does not exist?

(A) Tl [I3] (B) PBr

5(C) SbCl

5(D) BiBr

5

Q.3

OO

O

is tautomer of

(A)

OH

O

O

(B)

OH

O

OH

(C)

OH

OH

OH

(D) All of these

Q.4 Which of the following statements regarding defects in crystalline solids is correct?

(A) Schottky defects exist in non-ionic substances and does not affect density of substance

(B) Frenkel defects increases the dielectric constant.

(C) Introduction of impurity defect in Si by insertion of Al will create n-type semiconductors.

(D) The formation of wustite is an example of metal excess defect.


17/24

CHEMISTRY



Q.5 If , and are the bond angles ( FAF where A is the central atom) in CF4

, POF3

and SO2F

2

respectively, the correct order is :

(A) > > (B) < < (C) < < (D) > >

Q.6 True statements regarding SN1 reaction is/are

(A) Perfect racemisation is observed

(B) Only Walden inversion is observed(C) Total retention of configuartion is observed

(D) None of these

Q.7 200 ml of a very dilute aqueous solution of a protein contains 1.9gm of the protein. If osmotic rise of such

a solution at 300K is found to be 38 mm of solution then calculate molar mass of the protein.

(A) 24630 gm/mole (B) 123150 milli gm/mole

(C) 517230 gm/mole (D) 61575 gm/mole

Q.8 Which of the following reactions does not produce H2O

2?

(A) BaO2

+ H2

S4

(B) Na2

O2

+ H2

O(ice cold)

(C) PbO2

+ H2SO

4 (D) None of these

Q.9 Choose alkane that give more than one monochloro derivative upon reaction with chlorine in sun light.

(A) (B) (C) (D)


18/24

CHEMISTRY



Q.10 Which of the following statements regarding electrolytic conductance is not correct?

(A) The value of constant, 'A' in the equation for variation of molar conductance with square root of

concentration, CA0mCm for KCl and NaCl )A&A( NaClKCl aqueous solution will be

same at same temperature.

(B) The value of limiting molar conductivity ( 0m ) of CH3COOH solution can not be obtained on

extrapolation of graph ofm vs C .(C) The correct order of limiting molar conductivity of H+, Na+ and Mg+2 follow the order,

0

Nam

0

Lim

0

Hm .

(D) For all weak electrolytes, Keq

=)(

C

C,m0m

0m

2C,m

, where K

eqis the dissociation constant, C,m is

molar conductivity at any concentration and 0m is limiting molar conductivity..

Q.11 The reaction which is consistent with the fact that Cl2O6(s) exists as [ClO2+

][ClO4

], would be(A) Cl

2O

6+ NaOH NaClO

3+ NaClO

4+ H

2O

(B) Cl2O

6+ HF ClO

2F + HClO

4

(C) 2HClO4

+ P2O

5 2HPO

3+ Cl

2O

7

(D) 2ClO2

+ 2O3

C0Cl

2O

6+ 2O

2


19/24

CHEMISTRY



Q.12

NO2

Cl

,Fe

Br2 (X)

,OHCH

ONaCH

3

3 (Y)

Product (Y) of this reaction is

(A)

NO2

OCH3

Cl

(B)

NO2

OCH3

Br

(C)

NO2

OCH3

(D)

NO2

OCH3

Q.13 Calculate solubility of AgCN in a solution buffered at [H

+

] = 0.06 M if Ksp of AgCN =6 10

17

and Kaof HCN = 109.

(A) 60 109 (B) 6 105 (C) 6 1013 (D) 6 108

Q.14 The acidic strength of oxides of nitrogen follows the order:

(A) N2O < NO < N

2O

3< N

2O

4< N

2O

5(B) NO < NO

2< N

2O < N

2O

3< N

2O

5

(C) NO < N2O < N

2O

3< N

2O

5< N

2O

4(D) NO < N

2O < N

2O

5< N

2O

3< N

2O

4


20/24

CHEMISTRY



Q.15 CH3C CCH

3

Product (A) & (B) respectively :[E = Entegen; Z = Zusamen]

(A) E, E (B) E, Z (C) Z, Z (D) Z, E

Q.16 For a Vander Waal gas with a = 0.2463 atm lit2 mol1 and b = 0.01 lit mol1 subjected to adiabatic free

expansion at an initial temperature of 650 K will show which of the following characteristics.

(A) q = 0, w = 0, T = 0 (B) q = 0, w = 0, T > 0

(C) q = 0, w = 0 , T < 0 (D) q 0, w = 0, T = 0

Q.17 Which of the following processes of leaching / concentration is not correctly matched?

(A) Red bauxiteBaeyer's process(B) White/Brown bauxite

Serpeck's process

(C) BauxiteHall's process(D) Heavy transition metal oxidesFroth floatation process

Q.18 Which of the following will not produce same product when treated with dil.H2SO

4with HgSO

4or

when undergo hydroboration oxidation?

(A) (B) H

(C) HPh (D) HCl3C


21/24

CHEMISTRY



Q.19 Consider a first order gas phase reaction,

A(g)

B(g)

+ C(g)

The initial pressure taking only A in a rigid vessel was found to be P atm. After a lapse of 10 minutes, the

pressure of the system increases by x units and became P10

atm. The rate constant for the reaction is

given by

(A) K =1

minxP

Plog

10

303.2

(B) K =

1hr

2/xP

Plog

10

303.2

(C) K = 2.303 6 log1

10

hrPP

P

(D) K = 2.303 6 log

10PP3

P2

hr1

Q.20 The anion which does not produce diatomic gas on treatment with hot and concentrated sulphuric is :

(A) Br (B) I (C) Cl (D) None of these

Q.21

OH3 (A) + (B) formed can be distinguished by

(A) Iodoform (B) Fehling (C) NaHSO3

(D) 2,4-DNP

Q.22 How does the surface tension of a liquid vary with increase in temperature?

(A) Remains same (B) Increases (C) Decreases (D) No regular pattern

Q.23 The cation which gives white precipitate of its hydroxide when treated with aqueous ammonium sulphide

solution is :

(A) Pb2+ (B) Al3+ (C) Cr3+ (D) Ni2+


22/24

CHEMISTRY



Q.24 OHOCD2|D

Cannizzaro

X and Y.Y.

X and Y will have structure :

(A) OCD||

O

,

D|

OHCD

|D

(B) OCD||

O

,

H|

OHCD

|D

(C) OCH||

O

,

D|

OHCD|D

(D) none is correct

Q.25 What volume of O2(g)

measured at NTP will be formed by action of 200 ml of 0.4 M KMnO4

of

hydrogen peroxide in acid solution.

(A) 4.48 litre (B) 2.24 litre (C) 8.96 litre (D) 1.12 litre

Q.26 CuSO4

+ NH4OH Deep blue soluble

excess complex salt

The correct statement(s) regarding the complex is /are :

(A) It has square planar geometry.

(B) It is paramagnetic in nature.

(C) Unpaird electron present in p-orbital of copper.

(D) All the these


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Q.27

Cl

Cl

H

H)ii(

Hg/Mg)i(

Zn/OH)ii(

O)i(

etherDry

NaCBA

2

3Product is

(A)

O

(B)

O

(C)

O

(D)

O

[REASONING TYPE]


Q.28 Statement-1 : In a hydrogen atom 2s and 2p orbital are degenerate where as in case of oxygen atom,

they are not.

Statement-2 : The repulsions between electrons are present in multielectron atoms which cause

change in energy of levels.

(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.



Q.29 Statement-1 : Both CrO42and Cr

2O

72ions when treated with acidified H

2O

2solution gives blue

solution which turns green on standing.

Statement-2 : Blue solution of CrO5

is stabilised in the presence of organic solvent e.g. ether,

pyridine etc.


(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.



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CHEMISTRY



FOR AB

Q.30 Statement-1: Per molecule of D-Glucose consumes two molecule of PhNHNH2during formation

of osazone.

Statement-2: Structure of Glucose osazone is

C=NNHC H6 5

CH OH2

CH=NNHC H6 5

HO

HH

H

OHOH





FOR SMS

Q.30 Statement-1 : C = N

Et

Me OH

42SOH.conc EtNHCMe

||O

Statement-2 : During carbocation rearrangementEt a better migration thanMe.(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.



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FINAL TEST XII (AB