Wbjee 2017 Question Paper 2 Physics Chemistry Question Paper with Solutions | WBJEE Mock Test | JeeMate

Q 1PhysicsSection B • Numericalmagnetism

+2 / -0

Two long parallel wires separated by 0.1 m carry currents of 1A and 2A, respectively in opposite directions. A third current-carrying wire parallel to both of them is placed in the same plane such that it feels no net magnetic force. It is placed at a distance of

Q 2PhysicsSection A • MCQelectrostatics

+2 / -0.5

A unit negative charge with mass M resides at the mid-point of the straight line of length 2a adjoining two fixed charges of magnitude +Q each. If it is given a very small displacement x(x << a) in a direction perpendicular to the straight line, it will

A

come back to its original position and stay there

B

execute oscillations with frequency

{1 \over {2\pi }}\sqrt {{Q \over {2\pi {\varepsilon _0}M{a^3}}}}

C

fly to infinity

D

execute oscillations with frequency

{1 \over {2\pi }}\sqrt {{Q \over {2\pi {\varepsilon _0}M{a^2}}}}

Q 3PhysicsSection A • MCQheat and thermodynamics

+1 / -0.25

2 moles of an ideal monoatomic gas is carried from a state (p₀, V₀) to state (2p₀, 2V₀) along a straight line path in a p-V diagram. The amount of heat absorbed by the gas in the process is given by

A

3 p₀V₀

B

{9 \over 2}

p₀V₀

C

6 p₀V₀

D

{3 \over 2}

p₀V₀

Q 4PhysicsSection A • MCQray optics

+1 / -0.25

The ratio of the diameter of the sun to the distance between the earth and the sun is approximately 0.009. The approximate diameter of the image of the sun formed by concave spherical mirror of radius of curvature 0.4 m is

A

4.5

\times

10^{$-$ 6} m

B

4.0

\times

10^{$-$ 6} m

C

3.6

\times

10^{$-$ 3} m

D

1.8

\times

10^{$-$ 3} m

Q 5PhysicsSection A • MCQelectronic devices

+1 / -0.25

When a semiconducting device is connected in series with a battery and a resistance, a current is found to flow in the circuit. If however, the polarity of the battery is reversed, practically no current flows in the circuit. The device may be

A

a p-type semiconductor

B

a n-type semiconductor

C

an intrinsic semiconductor

D

a p-n junction

Q 6PhysicsSection A • MCQproperties of matter

+1 / -0.25

A liquid of bulk modulus k is compressed by applying an external pressure such that its density increases by 0.01%. The pressure applied on the liquid is

A

{k \over {10000}}

B

{k \over {1000}}

C

1000 k

D

0.01 k

Q 7PhysicsSection A • MCQwork power and energy

+2 / -0.5

A bullet of mass 4.2

\times

10^{$-$ 2} kg, moving at a speed of 300 ms^{$-$ 1}, gets stuck into a block with a mass 9 times that of the bullet. If the block is free to move without any kind of friction, the heat generated in the process will be

A

45 cal

B

405 cal

C

450 cal

D

1701 cal

Q 8PhysicsSection A • MCQcurrent electricity

+2 / -0.5

Consider the circuit given here. The potential difference V_BC between the points B and C is

qImage--current-electricity-electricity-Jeemate

A

1 V

B

0.5 V

C

0 V

D

-

1 V

Q 9PhysicsSection A • MCQproperties of matter

+1 / -0.25

A solid rectangular sheet has two different coefficients of linear expansion

\alpha

₁ and

\alpha

₂ along its length and breadth respectively. The coefficient of surface expansion is (for

\alpha

₁ t << 1,

\alpha

₂t < <1)

A

{{{\alpha _1} + {\alpha _2}} \over 2}

B

2({\alpha _1} + {\alpha _2})

C

{{4{\alpha _1}{\alpha _2}} \over {{\alpha _1} + {\alpha _2}}}

D

{\alpha _1} + {\alpha _2}

Q 10PhysicsSection B • Numericalatoms and nuclei

+2 / -0

Let v_n and E_n be the respective speed and energy of an electron in the nth orbit of radius r_n, in a hydrogen atom, as predicted by Bohr's model. Then

Q 11PhysicsSection A • MCQcurrent electricity

+1 / -0.25

Three capacitors of capacitance 1.0, 2.0 and 5.0

\mu

F are connected in series to a 10 V source. The potential difference across the 2.0

\mu

F capacitor is

A

{{100} \over {17}}

V

B

{{20} \over {17}}

V

C

{{50} \over {17}}

V

D

10V

Q 12PhysicsSection A • MCQmagnetism

+1 / -0.25

A proton is moving with a uniform velocity of

{{{10}^6}}

ms^{$-$ 1} along the Y-axis, under the joint action of a magnetic field along Z-axis and an electric field of magnitude 2

\times

10⁴ Vm^{$-$ 1} along the negative X-axis. If the electric field is switched off, the proton starts moving in a circle. The radius of the circle is nearly (given :

{e \over m}

ratio for proton

\approx

10⁸ Ckg^{$-$ 1})

A

0.5 m

B

0.2 m

C

0.1 m

D

0.05 m

Q 13PhysicsSection A • MCQmagnetism

+1 / -0.25

The magnetic field due to a current in a straight wire segment of length L at a point on its perpendicular bisector at a distance r(r >> L)

A

decreases as

{1 \over r}

B

decreases as

{1 \over {{r^2}}}

C

decreases as

{1 \over {{r^3}}}

D

approaches a finite limit as r

\to

\infty

Q 14PhysicsSection B • Numericalcenter of mass

+2 / -0

A small steel ball bounces on a steel plate held horizontally. On each bounce the speed of the ball arriving at the plate is reduced by a factor e (coefficient of restitution) in the rebound, so that V_upward = eV_downward. If the ball is initially dropped from a height of 0.4 m above the plate and if 10 seconds later the bouncing ceases, the value of e is

Q 15PhysicsSection A • MCQcurrent electricity

+1 / -0.25

Consider the circuit shown in the figure where all the resistances are of magnitude 1 k

\Omega

. If the current in the extreme right resistance X is 1 mA, the potential difference between A and B is

A

34 V

B

21 V

C

68 V

D

55 V

Q 16PhysicsSection A • MCQelectrostatics

+1 / -0.25

A positive charge Q is situated at the centre of a cube. The electric flux through any face of the cube is (in SI units)

A

{Q \over {6{\varepsilon _0}}}

B

4\pi Q

C

{Q \over {4\pi {\varepsilon _0}}}

D

{Q \over {6\pi {\varepsilon _0}}}

Q 17PhysicsSection A • MCQcurrent electricity

+1 / -0.25

Six wires, each of resistance r, are connected so as to form a tetrahedron. The equivalent resistance of the combination when current enters through one corner and leaves through some other corner is

A

r

B

2r

C

{r \over 3}

D

{r \over 2}

Q 18PhysicsSection A • MCQlaws of motion

+1 / -0.25

A block of mass 1 kg starts from rest at x = 0 and moves along the X-axis under the action of a force F = kt, where t is time and k = 1 Ns^{$-$ 1}. The distance the block will travel in 6 seconds is

A

36 m

B

72 m

C

108 m

D

18 m

Q 19PhysicsSection A • MCQcenter of mass

+1 / -0.25

Two particles A and B (both initially at rest) start moving towards each other under a mutual force of attraction. At the instant, when the speed of A is v and the speed of B is 2v, the speed of the centre of mass is

A

zero

B

v

C

{{3v} \over 2}

D

-

{{3v} \over 2}

Q 20PhysicsSection A • MCQray optics

+1 / -0.25

qImage--geometrical-optics-optics-Jeemate

A parallel beam of light is incident on a glass prism in the shape of a quarter cylinder of radius R = 0.05 m and refractive index n = 1.5, placed on a horizontal table as shown in the figure. Beyond the cylinder, a patch of light is found whose the nearest distance x from the cylinder is

A

(3\sqrt 3 - 4) \times {10^{ - 2}}

m

B

(2\sqrt 3 - 2) \times {10^{ - 2}}

m

C

(3\sqrt 5 - 5) \times {10^{ - 2}}

m

D

(3\sqrt 2 - 3) \times {10^{ - 2}}

m

Q 21PhysicsSection A • MCQsimple harmonic motion

+1 / -0.25

A uniform string of length L and mass M is fixed at both ends while it is subject to a tension T. It can vibrate at frequencies (v) given by the formula (where n = 1, 2, 3, ....)

A

v = {n \over 2}\sqrt {{T \over {ML}}}

B

v = {n \over {2L}}\sqrt {{T \over M}}

C

v = {1 \over {2n}}\sqrt {{T \over {ML}}}

D

v = {n \over 2}\sqrt {{{TL} \over M}}

Q 22PhysicsSection A • MCQray optics

+1 / -0.25

A point object is held above a thin equiconvex lens at its focus. The focal length is 0.1 m and the lens rests on a horizontal thin plane mirror. The final image will be formed at

A

infinite distance above the lens

B

0.1 m above the center of the lens

C

infinite distance below the lens

D

0.1 m below the center of the lens

Q 23PhysicsSection A • MCQwave optics

+1 / -0.25

Two monochromatic coherent light beams A and B have intensities L and

{{L \over 4}}

, respectively. If these beams are superposed, the maximum and minimum intensities will be

A

{{{9L} \over 4},{L \over 4}}

B

{{{5L} \over 4}}

, 0

C

{{{5L} \over 2}}

, 0

D

2L,

{{L \over 2}}

Q 24PhysicsSection A • MCQelectrostatics

+2 / -0.5

A particle with charge Q coulomb, tied at the end of an inextensible string of length R metre, revolves in a vertical plane. At the centre of the circular trajectory, there is a fixed charge of magnitude Q coulomb. The mass of the moving charge M is such that

Mg = {{{Q^2}} \over {4\pi {\varepsilon _0}{R^2}}}

. If at the highest position of the particle, the tension of the string just vanishes, the horizontal velocity at the lowest point has to be

A

0

B

2\sqrt {gR}

C

\sqrt {2gR}

D

\sqrt {5gR}

Q 25PhysicsSection A • MCQcurrent electricity

+1 / -0.25

Consider the circuit shown in the figure.

qImage--current-electricity-electricity-Jeemate

The value of the resistance X for which the thermal power generated in it is practically independent of small variation of its resistance is

A

X = R

B

X =

{R \over 3}

C

X =

{R \over 2}

D

X = 2R

Q 26PhysicsSection A • MCQatoms and nuclei

+1 / -0.25

The de-Broglie wavelength of an electron is

0.4 \times {10^{ - 10}}

m when its kinetic energy is 1.0 keV. Its wavelength will be

1.0 \times {10^{ - 10}}

m, when its kinetic energy is

A

0.2 keV

B

0.8 keV

C

0.63 keV

D

0.16 keV

Q 27PhysicsSection A • MCQdual nature of radiation

+1 / -0.25

When light of frequency v₁ is incident on a metal with work function W (where hv₁ > W), then photocurrent falls to zero at a stopping potential of V₁. If the frequency of light is increased to v₂, the stopping potential changes to V₂. Therefore, the charge of an electron is given by

A

{{W({v_2} + {v_1})} \over {{v_1}{V_2} + {v_2}{V_1}}}

B

{{W({v_2} + {v_1})} \over {{v_1}{V_1} + {v_2}{V_2}}}

C

{{W({v_2} - {v_1})} \over {{v_1}{V_2} - {v_2}{V_1}}}

D

{{W({v_2} - {v_1})} \over {{v_2}{V_2} - {v_1}{V_1}}}

Q 28PhysicsSection A • MCQelectrostatics

+1 / -0.25

A charge of 0.8 coulomb is divided into two charges Q₁ and Q₂. These are kept at a separation of 30 cm. The force on Q₁ is maximum when

A

Q₁ = Q₂ = 0.4 C

B

Q₁

\approx

0.8 C, Q₂ negligible

C

Q₁ negligible, Q₂

\approx

0.8 C

D

Q₁ = 0.2 C, Q₂ = 0.6 C

Q 29PhysicsSection A • MCQheat and thermodynamics

+1 / -0.25

Temperature of an ideal gas, initially at 27

^\circ

C, is raised by 6

^\circ

C. The rms velocity of the gas molecules will

A

increase by nearly 2%

B

decrease by nearly 2%

C

increase by nearly 1%

D

decrease by nearly 1%

Q 30PhysicsSection A • MCQproperties of matter

+1 / -0.25

A uniform capillary tube of length l and inner radius r with its upper end sealed is submerged vertically into water. The outside pressure is p₀ and surface tension of water is

\gamma

. When a length x of the capillary is submerged into water, it is found that water levels inside and outside the capillary coincide. The value of x is

A

{l \over {\left( {1 + {{{p_0}r} \over {4\gamma }}} \right)}}

B

\left( {1 - {{{p_0}r} \over {4\gamma }}} \right)

C

\left( {1 - {{{p_0}r} \over {2\gamma }}} \right)

D

{l \over {\left( {1 + {{{p_0}r} \over {2\gamma }}} \right)}}

Q 31PhysicsSection A • MCQsimple harmonic motion

+1 / -0.25

The velocity of a particle executing a simple harmonic motion is 13 ms^{$-$ 1}, when its distance from the equilibrium position (Q) is 3 m and its velocity is 12 ms^{$-$ 1}, when it is 5 m away from Q. The frequency of the simple harmonic motion is

A

{{5\pi } \over 8}

B

{5 \over {8\pi }}

C

{{8\pi } \over 5}

D

{8 \over {5\pi }}

Q 32PhysicsSection A • MCQmagnetism

+2 / -0.5

A particle with charge e and mass m, moving along the X-axis with a uniform speed u, enters a region where a uniform electric field E is acting along the Y-axis. The particle starts to move in a parabola. Its focal length (neglecting any effect of gravity) is

A

{{{2m{u^2}} \over {eE}}}

B

{{{eE} \over {2m{u^2}}}}

C

{{{mu} \over {2eE}}}

D

{{{m{u^2}} \over {2eE}}}

Q 33PhysicsSection A • MCQelectronic devices

+1 / -0.25

qImage--electronic-devices-modern-physics-Jeemate

In the given circuit, the binary inputs at A and B are both 1 in one case and both 0 in the next case. The respective outputs at Y in these two cases will be

A

1, 1

B

0, 0

C

0, 1

D

1, 0

Q 34PhysicsSection A • MCQunits and measurements

+1 / -0.25

The dimension of the universal constant of gravitation, G is

A

[M{L^2}{T^{ - 1}}]

B

[{M^{ - 1}}{L^3}{T^{ - 2}}]

C

[{M^{ - 1}}{L^2}{T^{ - 2}}]

D

[M{L^3}{T^{ - 2}}]

Q 35PhysicsSection A • MCQalternating current

+1 / -0.25

When the frequency of the AC voltage applied to a series LCR circuit is gradually increased from a low value, the impedance of the circuit

A

monotonically increases

B

first increases and then decreases

C

first decreases and then increases

D

monotonically decreases

Q 36PhysicsSection B • Numericalheat and thermodynamics

+2 / -0

If the pressure, temperature and density of an ideal gas are denoted by p, T and

\rho

, respectively, the velocity of sound in the gas is

Q 37PhysicsSection B • Numericalmagnetism

+2 / -0

If

\chi

stands for the magnetic susceptibility of a substance,

\mu

for its magnetic permeability and

\mu

₀ for the permeability of free space, then

Q 38PhysicsSection A • MCQmagnetism

+1 / -0.25

The magnets of two suspended coil galvanometers are of the same strength so that they produce identical uniform magnetic fields in the region of the coils. The coil of the first one is in the shape of a square of side a and that of the second one is circular of radius

{a \over {\sqrt \pi }}

. When the same current is passed through the coils, the ratio of the torque experienced by the first coil to that experienced by the second one is

A

1 :

{1 \over {\sqrt \pi }}

B

1 : 1

C

\pi

: 1

D

1 :

\pi

Q 39PhysicsSection A • MCQvector algebra

+1 / -0.25

Three vectors

\overrightarrow A

= a

\widehat i

+

\widehat j

+

\widehat k

;

\overrightarrow B

=

\widehat i

+ b

\widehat j

+

\widehat k

and

\overrightarrow C

=

\widehat i

+

\widehat j

+ c

\widehat k

are mutually perpendicular (

\widehat i

,

\widehat j

and k are unit vectors along X, Y and Z-axes respectively). The respective values of a, b and c are

A

0, 0, 0

B

- {1 \over 2}

,

- {1 \over 2}

,

- {1 \over 2}

C

1,

-

1, 1

D

{1 \over 2}

,

{1 \over 2}

,

{1 \over 2}

Q 40PhysicsSection A • MCQatoms and nuclei

+1 / -0.25

Radon-222 has a half-life of 3.8 days. If one starts with 0.064 kg of radon-222 left after 19 days will be

A

0.002 kg

B

0.062 kg

C

0.032 kg

D

0.024 kg

Q 41ChemistrySection A • MCQp block elements

+1 / -0.25

When BaCl₂ is added to an aqueous salt solution, a white precipitate is obtained. The anion among CO

_3^{2 - }

, SO

_3^{2 - }

and SO

_4^{2 - }

that was present in the solution can be

A

CO

_3^{2 - }

but not any of the other two

B

SO

_3^{2 - }

but not any of the other two

C

SO

_4^{2 - }

but not any of the other two

D

Any of them

Q 42ChemistrySection A • MCQatomic structure

+1 / -0.25

Which of the following sets of quantum numbers represents the 19^th electron of Cr(Z = 24) ?

A

\left( {4,1, - 1, + {1 \over 2}} \right)

B

\left( {4,0,0, + {1 \over 2}} \right)

C

\left( {3,2,0, - {1 \over 2}} \right)

D

\left( {3,2, - 2, + {1 \over 2}} \right)

Q 43ChemistrySection A • MCQchemical equilibrium

+1 / -0.25

Equilibrium constants for the following reactions at 1200 K are given

2H₂O(g)

\rightleftharpoons

2H₂(g) + O₂(g), K₁ = 6.4

\times

10^{$-$ 8}

2CO₂(g)

\rightleftharpoons

2CO(g) + O₂(g), K₂ = 1.6

\times

10^{$-$ 6}

The equilibrium constant for the reaction?

H₂(g) + CO₂(g)

\rightleftharpoons

CO(g) + H₂O(g) at 1200 K will be

A

0.05

B

20

C

0.2

D

5.0

Q 44ChemistrySection A • MCQredox reactions

+1 / -0.25

0.126 g of an acid is needed to completely neutralise 20 mL 0.1 (N) NaOH solution. The equivalent weight of the acid is

A

53

B

40

C

45

D

63

Q 45ChemistrySection A • MCQchemical bonding and molecular structure

+1 / -0.25

The ground state magnetic property of B₂ and C₂ molecules will be

A

B₂ paramagnetic and C₂ diamagnetic

B

B₂ diamagnetic and C₂ paramagnetic

C

Both are diamagnetic

D

Both are paramagnetic

Q 46ChemistrySection A • MCQatomic structure

+1 / -0.25

Which one of the following corresponds to a photon of highest energy?

A

\lambda

= 300 mm

B

v = 3

\times

10⁸ s^{$-$ 1}

C

\overline v

= 30 cm^{$-$ 1}

D

\varepsilon

= 6.626

\times

10^{$-$ 27} J

Q 47ChemistrySection A • MCQcarboxylic acids and amines

+2 / -0.5

The reaction sequence given below given product R.

qImage--carboxylic-acids-and-amines-organic-chemistry-Jeemate

The structure of the product R is

A

B

C

D

Q 48ChemistrySection A • MCQredox reactions

+2 / -0.5

What will be the normality of the salt solution obtained by neutralising x mL y (N) HCl with y mL x(N) NaOH, and finally adding (x + y) mL distilled water

A

{{2(x + y)} \over {xy}}N

B

{{xy} \over {2(x + y)}}N

C

\left( {{{2xy} \over {x + y}}} \right)N

D

\left( {{{x + y} \over {xy}}} \right)N

Official Correct Answer:Option (B)

Step-by-Step Solution:

The reaction for given reaction is

	HCl + NaOH $\to$ NaCl + H₂O
Number of moles	xy	xy	0	0
Added	NV	NV
Number of moles left	0	0	xy	xy

\therefore

N (solution) =

{{Number\,of\,milliequivalent} \over {vol.\,of\,solution\,in\,mililetre}}

Q 49ChemistrySection A • MCQsolid state

+2 / -0.5

In a close-packed body-centred cubic lattice of potassium, the correct relation between the atomic radius (r) of potassium and the edge-length (a) of the cube is

A

r = {a \over {\sqrt 2 }}

B

r = {a \over {\sqrt 3 }}

C

r = {{\sqrt 3 } \over 2}a

D

r = {{\sqrt 3 } \over 4}a

Q 50ChemistrySection A • MCQatomic structure

+1 / -0.25

If the given four electronic configurations.

(i) n = 4, l = 1

(ii) n = 4, l = 0

(iii) n = 3, l = 2

(iv) n = 3, l = 1

are arranged in order of increasing energy, then the order will be

A

(iv) < (ii) < (iii) < (i)

B

(ii) < (iv) < (i) < (iii)

C

(i) < (iii) < (ii) < (iv)

D

(iii) < (i) < (iv) < (ii)

Q 51ChemistrySection B • Numericals block elements

+2 / -0

During electrolysis of molten NaCl, some water was added. What will happen?

Q 52ChemistrySection A • MCQionic equilibrium

+1 / -0.25

Dissolving NaCN in de-ionised water will result in a solution having

A

pH < 7

B

pH = 7

C

pOH = 7

D

pH > 7

Q 53ChemistrySection A • MCQcoordination compounds

+1 / -0.25

The number of unpaired electrons in

{[NiC{l_4}]^{2 - }}

,

Ni{(CO)_4}

and

{[Cu{(N{H_3})_4}]^{2 + }}

respectively are

A

2, 2, 1

B

2, 0, 1

C

0, 2, 1

D

2, 2, 0

Q 54ChemistrySection A • MCQcarboxylic acids and amines

+1 / -0.25

The yield of acetanilide in the reaction (100% conversion) of 2 moles of aniline with 1 mole of acetic anhydride is

A

270 g

B

135 g

C

67.5 g

D

177 g

Q 55ChemistrySection A • MCQradioactivity and nuclear chemistry

+1 / -0.25

C₆H₅F¹⁸ is a F¹⁸ radio-isotope labelled organic compound. F¹⁸ decays by positron emission. The product resulting on decay is

A

C₆H₅O¹⁸

B

C₆H₅Ar¹⁹

C

B¹²C₅H₅F

D

C₆H₅O¹⁶

Q 56ChemistrySection B • Numericalaromatic chemistry

+2 / -0

The reduction of benzene diazonium chloride to phenyl hydrazine can be accomplished by

Q 57ChemistrySection A • MCQalcohols phenols and ethers

+1 / -0.25

The structure of the product P of the following reaction is

qImage--alcohol-and-ether-organic-chemistry-Jeemate

A

B

C

D

Q 58ChemistrySection A • MCQd and f block elements

+1 / -0.25

The correct basicity order of the following lanthanide ions is

A

La³⁺ > Lu³⁺ > Ce³⁺ > Eu³⁺

B

Ce³⁺ > Lu³⁺ > La³⁺ > Eu³⁺

C

Lu³⁺ > Ce³⁺ > Eu³⁺ > La³⁺

D

La³⁺ > Ce³⁺ > Eu³⁺ > Lu³⁺

Q 59ChemistrySection A • MCQalcohols phenols and ethers

+2 / -0.5

Reduction of the lactol S qImage--alcohol-and-ether-organic-chemistry-Jeemate

with sodium borohydride gives

A

B

C

D

Q 60ChemistrySection A • MCQiupac nomenclature

+1 / -0.25

In the IUPAC system, PhCH₂CH₂CO₂H is named as

A

3-phenylpropanoic acid

B

benzylacetic acid

C

carboxyethylbenzene

D

2phenylpropanoic acid

Q 61ChemistrySection B • Numericalcarboxylic acids and amines

+2 / -0

The conversion of CH₃

-

CH₂

-

COOH to

can be accomplished by

Q 62ChemistrySection A • MCQcarboxylic acids and amines

+1 / -0.25

For the reaction below

qImage--carboxylic-acids-and-amines-organic-chemistry-Jeemate

the structure of the product Q is

A

B

C

D

Q 63ChemistrySection A • MCQsolutions

+1 / -0.25

Assuming the compounds to be completely dissociated in aqueous solution, identify the pair of the solutions that can be expected to be isotonic at the same temperature.

A

0.01 M urea and 0.01 M NaCl

B

0.02 M NaCl and 0.01 M Na₂SO₄

C

0.03 M NaCl and 0.02 M MgCl₂

D

0.01 M sucrose and 0.02 M glucose

Q 64ChemistrySection A • MCQgeneral organic chemistry

+1 / -0.25

The correct order of acid strengths of benzoic acid (X), peroxybenzoic acid (Y) and p-nitrobenzoic acid (Z) is

A

Y > Z > X

B

Z > Y > X

C

Z > X > Y

D

Y > X > Z

Q 65ChemistrySection A • MCQionic equilibrium

+1 / -0.25

Of the following compounds, which one of the strongest Bronsted acid in a aqueous solution?

A

HClO₃

B

HClO₂

C

HOCl

D

HOBr

Q 66ChemistrySection A • MCQionic equilibrium

+1 / -0.25

PbCl₂ is insoluble in cold water. Addition of HCl increases its solubility due to

A

formation of soluble complex anions like [PbCl₃]^$-$

B

oxidation of Pb(II) to Pb(IV)

C

formation of [Pb(H₂O)₆]²⁺

D

formation of polymeric lead complexes

Q 67ChemistrySection A • MCQchemical bonding and molecular structure

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The shape of

XeF_5^ -

will be

A

square pyramid

B

trigonal bipyramidal

C

planar

D

pentagonal bipyramid

Q 68ChemistrySection A • MCQchemistry in everyday life

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The compound that would produce a nauseating smell/odour with a hot mixture of chloroform and ethanolic potassium hydroxide is

A

PhCONH₂

B

PhNHCH₃

C

PhNH₂

D

PHOH

Q 69ChemistrySection A • MCQperiodic classification of elements

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Which of the following atoms should have the highest 1^st electron affinity?

A

F

B

O

C

N

D

C

Q 70ChemistrySection A • MCQhydrocarbons

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The isomerisation of 1-butyne to 2-butyne can be achieved by treatment with

A

hydrochloric acid

B

ammoniacal silver nitrate

C

ammoniacal cuprous chloride

D

ethanolic potassium hydroxide

Q 71ChemistrySection A • MCQsome basic concepts of chemistry

+1 / -0.25

In a flask, the weight ratio of CH₄(g) and SO₂(g) at 298 K and 1 bar is 1 : 2. The ratio of the number of molecules of SO₂(g) and CH₄(g) is

A

1 : 4

B

4 : 1

C

1 : 2

D

2 : 1

Q 72ChemistrySection B • Numericalp block elements

+2 / -0

The role of fluorspar, which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite is

Q 73ChemistrySection A • MCQsome basic concepts of chemistry

+1 / -0.25

Which of the following has the dimension if [

M{L^0}{T^{ - 2}}

] ?

A

Coefficient of viscosity

B

Surface tension

C

Vapour pressure

D

Kinetic energy

Q 74ChemistrySection A • MCQelectrochemistry

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How many faradays are required to reduce 1 mol of

C{r_2}O_7^{2 - }

to Cr³⁺ in acid medium?

A

2

B

3

C

5

D

6

Q 75ChemistrySection A • MCQbiomolecules

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ADP and ATP differ in the number of

A

phosphate units

B

ribose units

C

adenine base

D

nitrogen atom

Q 76ChemistrySection A • MCQredox reactions

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You are supplied with 500 mL each of 2N HCl and 5N HCl. What is the maximum volume of 3M HCl that you can prepare using only these two solutions?

A

250 mL

B

500 mL

C

750 mL

D

1000 mL

Q 77ChemistrySection A • MCQs block elements

+2 / -0.5

Which of the following solutions will turn violet when a drop of lime juice is added to it?

A

A solution of NaI

B

A solution mixture of KI and NaIO₃

C

A solution mixture of NaI and KI

D

A solution mixture of KIO₃ and NaIO₃

Q 78ChemistrySection A • MCQgeneral organic chemistry

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Among Me₃N, C₅H₅N and MeCN (Me = methyl group) the electronegativity of N is in the order

A

MeCN > C₅H₅N > Me₃N

B

C₅H₅N > Me₃N > MeCN

C

Me₃N > MeCN > C₅H₅N

D

Electronegativity same in all

Q 79ChemistrySection A • MCQgaseous state

+1 / -0.25

qImage--gaseous-state-physical-chemistry-Jeemate

For same mass of two different ideal gases of molecular weights M₁ and M₂, Plots of log V vs log p at a given constant temperature are shown. Identify the correct option.

A

M₁ > M₂

B

M₁ = M₂

C

M₁ < M₂

D

Can be predicted only if temperature is known

Q 80ChemistrySection B • Numericalcarbonyl compounds

+2 / -0

The major product(s) obtained form the following reaction of 1 mole of hexadeuteriobenzene is/are

qImage--carbonyl-compounds-organic-chemistry-Jeemate

qImage--carbonyl-compounds-organic-chemistry-Jeemate

WBJEE 2017 Paper 2 (Physics & Chemistry) Question Paper with Solutions