Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

The most stable compound is

  • LiF

  • LiCl

  • LiBr

  • LiI


2.

When copper reacts with hot and conc. H2SO4 gives

  • H2

  • N2

  • O2

  • SO2


3.

BaO2 and ozone reacts to produce

  • Ba

  • Ba2O3

  • BaO

  • Ba(OH)3


4.

Heisenberg uncertainty principle can be explained as

  • x  P × h4π

  • x × P  h4π

  • x × P  hπ

  • P  πhx


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5.

A gas mixture contains O2 and N2 in the ratio of 1 : 4 by weight. The ratio of their number of molecules is

  • 1 : 8

  • 1 : 4

  • 3 : 16

  • 7 : 32


6.

The de-Broglie wavelenght of a particle with mass 1 kg and velocity 100 m/s is

  • 6.6 x 10-33 m

  • 6.6 x 10-36 m

  • 3.3 x 1033 m

  • 3.3 x 10-36 m


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7.

The volume of a gas measured at 27°C and 1 atm pressure is 10 L. To reduce the volume to 2 L at 1 atm pressure, the temperature required is

  • 60 K

  • 75 K

  • 150 K

  • 225 K


A.

60 K

Here, V1 = 10 L; V2 = 2 L

p1 = 1 atm; p2 = 1 atm

T1 = 300 K; T2 = x

p1V1T1 = p2V2T21 × 10300  = 1 × 2T2T2 = 300 × 210 = 60 K


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8.

The change in entropy for the fusion of 1 mole of ice is [mp of ice = 273 K, molar enthalpy of fusion for ice= 6.0 kJ mol-1]

  • 11.73 JK-1 mol-1

  • 18.84 JK-1 mol-1

  • 21.97 JK-1 mol-1

  • 24.47 JK-1 mol-1


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9.

Neutron is discovered by

  • Chadwick

  • Rutherford

  • Yukawa

  • Dalton


10.

What is X in the following nuclear reaction?

7N141H1 8O15 + X

  • 0n1

  • -1e0

  • +1e0

  • γ


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