Equal volumes of two monoatomic gases, A and B, at same temperat

Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Give that the equilibrium constant for the reaction,

2SO2 (g) + O2 (g)  ⇌ 2SO3 (g)

has a value of 278 at a particular temperature. What is the value of the equilibrium constant for the following reaction t the same temperature?

SO3 (g)  ⇌ SO2 (g) +1/2 O2 (g)

  • 1.8 x 10-3

  • 3.6 x 10-3

  • 6.0 x 10-2

  • 6.0 x 10-2

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2.

Given the reaction between two gases represented by A2 and B2 to give the compound AB (g).
A2(g) +B2 (g)  ⇌ 2AB (g)
At equilibrium the concentration
of A2 = 3.0 x 10-3 M
of B2 = 4.2 x 10-3 M
of AB = 2.8 x 10-3 M

If the reaction takes place in a sealed vessel at 527oC, then the value of Kc will be

  • 2.0

  • 1.9

  • 0.62

  • 0.62

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3.

During the change of O2 to O2- ion, the electron adds on which one of the following orbitals?

  • π* orbital

  • π orbital

  • σ* orbital

  • σ* orbital

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4.

A  certain gas takes three times as long to effuse out as helium. Its molecular mass will be 

  • 27 u

  • 36 u 

  • 64 u

  • 64 u

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5.

The orbital angular momentum of p-electron is given as

  • fraction numerator straight h over denominator square root of 2 straight pi end root end fraction
  • square root of 3 fraction numerator h over denominator 2 pi end fraction
  • square root of 3 over 2 end root space h over pi
  • square root of 3 over 2 end root space h over pi
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6.

For real gases van der Waal's equation is written as,

open parentheses straight p space plus an squared over straight V squared close parentheses open parentheses straight V minus nb close parentheses space equals space nRT
where, a and b are van der Waal's constants.
Two sets of gases are

I. O2, CO2, H2 and He
II. CH4, O2, and H2

The gases given in set- I increasing order of 'b' and gases given in set -II in decreasing order of 'a' are arranged below. Select the correct order from the following.

  • (I) He < H2 < CO< O2
    (II)  CH4>  H2> O2

  • (I) O2 < He < H2 < CO2
    (II) H2> O2 > CH4

  • (I) O2 < He < O2 < CO2
    (II) CH4 > O2 > H2  

  • (I) O2 < He < O2 < CO2
    (II) CH4 > O2 > H2  

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7.

Equal volumes of two monoatomic gases, A and B, at same temperature and pressure are mixed. The ratio of specific heats (Cp/Cv) of the mixture will be

  • 0.83

  • 1.50

  • 3.3

  • 3.3


D.

3.3

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8.

Four diatomic species are listed below. Identify the correct order in which the bond order is increasing in them.

  • NO< O2-<C22- < He2+

  •  O2- <NO< C22- < He2+

  • C22- < He2+ <O2- <NO

  • C22- < He2+ <O2- <NO

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9.

In the replacement reaction



The reaction will be most favourable if M happens to be

  • Na

  • K

  • Rb

  • Rb

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10.

A structure of a mixed oxide is cubic close packed (ccp). The cubic unit cell of mixed oxide is composed of oxide ions. One fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are occupied by a monovalent metal B. The formula of the oxide is

  • ABO2

  • A2BO2

  • A2B3O4

  • A2B3O4

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