NEET Chemistry: Questions 16 - 22 of 677

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Question number: 16

» Chemical Thermodynamics » Types of Processes

MCQ▾

Question

A process in which pressure remains constant is called?

Choices

Choice (4) Response
a.

Isothermal

b.

Isobaric

c.

Adiabatic

d. Isochoric

Question number: 17

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

MCQ▾

Question

The compounds which have negative enthalpies of formation are known as

Choices

Choice (4) Response
a.

endothermic compounds

b.

allotropic compounds

c.

isothermal compounds

d.

exothermic compounds

Question number: 18

» Chemical Thermodynamics » First Law of Thermodynamics » Work

MCQ▾

Question

Calculate the maximum work done in expanding the 16g of Oxygen at 300 K and occupying a volume of 5 dm3 isothermally until the volume becomes 25 dm3.

Choices

Choice (4) Response
a.

-2.01X10 3J

b.

2.01X103J

c.

-0.20X103J

d.

0.20X103J

Question number: 19

» Chemical Thermodynamics » Second Law of Thermodynamics » Standard Gibbs Energy Change

MCQ▾

Question

In the reaction A + + B → A + B + , there is no change of entropy. If enthalpy change is 22 KJ of A +. . Calculate Gibbs free energy change for the reaction. ?

Choices

Choice (4) Response
a.

22 k J/mol

b.

- 42 k J/mol

c.

42 k J/mol

d.

-22 k J/mol

Question number: 20

» Chemical Thermodynamics » Extensive and Intensive Properties

MCQ▾

Question

Calculate the maximum efficiency of an engine operating between 100°C and 25°C?

Choices

Choice (4) Response
a.

10 %

b.

40 %

c.

20 %

d.

30 %

Question number: 21

» Chemical Thermodynamics » State Functions » Entropy

MCQ▾

Question

If an endothermic reaction occurs spontaneously at constant temperature T and pressure P, then which of the following is true?

Choices

Choice (4) Response
a.

∆ S < 0

b.

∆ G > 0

c.

∆ S > 0

d.

∆ H < 0

Question number: 22

» Chemical Thermodynamics » State Functions » Entropy

MCQ▾

Question

Oxygen gas weighing 64 g is expanded from 1atm to 0.25atm at 30°C. Calculate entropy Change, assuming the gas to be ideal?

Choices

Choice (4) Response
a.

-23.053 J/K

b.

2.305 J/K

c.

-2.305 J/K

d.

23.053 J/K

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