Chemical Thermodynamics-First Law of Thermodynamics (NEET Chemistry): Questions 9 - 15 of 23

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Question number: 9

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpies of Bond

MCQ▾

Question

Which of the following acid will release maximum amount of heat when completely? Neutralized by strong base NaOH?

Choices

Choice (4) Response
a.

1MH 2SO 4

b.

1MHNO 3

c.

1MHCl

d.

1MHclO 4

Question number: 10

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

MCQ▾

Question

Calculate the enthalpy change for following reaction?

CH 4 (g) + 2O 2 (g) → CO 2 (g) + 2H 2 O (l)

Given enthalpies of formation of CH 4, CO 2, H 2O are -74.8 J/mol, -393.5 KJ/mol, -286.2KJ/mol

Choices

Choice (4) Response
a.

89.1 KJ

b.

-89.1 KJ

c.

-891.1 KJ

d.

891.0KJ

Question number: 11

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

MCQ▾

Question

The calorific value of methane is?

Choices

Choice (4) Response
a.

-150 KJ/g

b.

-48 KJ/g

c.

-33 KJ/g

d.

-55.6 KJ/g

Question number: 12

» Chemical Thermodynamics » First Law of Thermodynamics » Work

MCQ▾

Question

5 moles of an ideal gas at 27°C expands isothermally and reversibly from a volume of 6L to 60 L. The work done in k J is?

Choices

Choice (4) Response
a.

-56.72

b.

-14.7

c.

-28.72

d.

28.72

Question number: 13

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpies of Bond

MCQ▾

Question

The bond energies of C = C and C-C at 298K are 590 and 331 KJ/mol respectively. The enthalpy of polymerization per mole of ethylene is?

Choices

Choice (4) Response
a.

72 KJ

b.

-72 KJ

c.

-68 KJ

d.

-70 KJ

Question number: 14

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpies of Bond

MCQ▾

Question

The bond dissociation energies of gaseous H 2, Cl 2, and HCL are 104, 58 and 103 kcal/mol respectively. Calculate the enthalpy of formation of HCl (g)?

Choices

Choice (4) Response
a.

42 kcal/mol

b.

22 kcal/mol

c.

-22 klcal/mol

d.

-42kcal/mol

Question number: 15

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

MCQ▾

Question

Thermodynamic state quantity which is a measure of randomness or disorder of molecules of the system?

Choices

Choice (4) Response
a.

Entropy

b.

Work

c.

Enthalpy

d.

Heat capacity

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