Assertion : ∆H and ∆E are almost the same for the rea

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

381.

Assertion : BaCO3 is more soluble in HNO3 than in plain water.

Reason : Carbonate is a weak base and reacts with the H+ from the strong acid, causing the barium salt to dissociate.

  • If both assertion and reason are true and the reason is the correct explanation of the assertion.

  • If both assertion and reason are true and the reason is not the correct explanation of the assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


Advertisement

382.

Assertion : H and E are almost the same for the reaction, N2(g) + O2(g) → 2NO(g)

Reason : All reactants and products are gases.

  • If both assertion and reason are true and the reason is the correct explanation of the assertion.

  • If both assertion and reason are true and the reason is not the correct explanation of the assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


B.

If both assertion and reason are true and the reason is not the correct explanation of the assertion.

H = E + nRT

n = chnage in number of mole of products and reactant species.

N2(g) + O2(g)  2NO(g)

n = 2 - 2 = 0

H = E + 0 × RT H = E


Advertisement
383.

Which of the following is always feasible?

  • H=TS

  • H(+ve), TS (-ve) and H >TS

  • H(-ve), TS (+ve) and H < TS

  • H(-ve), TS (-ve) and H >TS.


384.

Given that 

C + O2  CO2 ; H° =-a kJ.2CO + O2  2CO2 ; H° = -b kJ. 

The heat of formation of CO is 

 

  • b-2a

  • 2a-b2

  • b-2a2

  • 2a-b


Advertisement
385.

For the reaction, X2Y4 (l) → 2XY2 (g) at 300 K, the values of U and S are 2 kcal and 20 cal K-1 respectively. The value of G for the reaction is

  • -3400 cal

  • 3400 cal

  • -2800 cal

  • 2000 cal


386.

Assertion: During an adiabatic process, heat energy is not exchanged between the system and its surroundings.

Reason: The temperature of a gas increases when it undergoes an adiabatic expansion.

 

  • If both assertion and reason are true and the reason is a correct explanation of the assertion.

  • If both the assertion and reason are true but the reason is not a correct explanation of the assertion.

  • If the assertion is true but the reason is false.

  • If both the assertion and reason are false.


387.

Assertion: Mass and volume are extensive properties.
Reason: Mass/volume is also an extensive parameter.

  • If both assertion and reason are true and reason is a correct explanation of the assertion.

  • If both the assertion and reason are true but the reason is not a correct explanation of the assertion.

  • If the assertion is true but the reason is false.

  • If both the assertion and reason are false.


388.

The values of H and S of a certain reaction are -400 kJ mol-1 and -20 kJ mol-1K-1 respectively. The temperature below which the reaction is spontaneous, is

  • 100 K

  • 20°C

  • 20 K

  • 120°C


Advertisement
389.

The enthalpy of vaporisation of a certain liquid at its boiling point of 35°C is 24.64 kJ mol-1. The value of change in entropy for the process is

  • 704 JK-1mol-1

  • 80 JK-1mol-1

  • 24.64 JK-1mol-1

  • 7.04 JK-1mol-1


390.

Given that,

    C + O2 → CO2H = -x kJ

2CO + O2 → 2CO2 ;H = -y kJ

The heat of formation of carbon monoxide will be

  • y - 2x2

  • y + 2x

  • 2x - y

  • 2x - y2


Advertisement