NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 21 - 25 of 1259

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Question number: 21

» Chemical Thermodynamics » State Functions » Entropy

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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.

∆ G > 0

b.

∆ S < 0

c.

∆ S > 0

d.

∆ H < 0

Question number: 22

» Chemical Thermodynamics » State Functions » Entropy

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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.

23.053 J/K

d.

-2.305 J/K

Question number: 23

» Chemical Thermodynamics » State Functions » Entropy

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Question

Calculate the entropy change when 1 mole of nitrogen gas expands isothermally and reversibly from an initial volume of 1 liter to a final volume of 10 liter at 27°C?

Choices

Choice (4)Response

a.

-19.12 J/K

b.

-1.912 J/K

c.

19.12 J/K

d.

1.912 J/K

Question number: 24

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

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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.

1MHCl

b.

1MHNO 3

c.

1MHclO 4

d.

1MH 2SO 4

Question number: 25

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

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MCQ▾

Question

Predict then following reaction for spontaneity

SOCl 2 + H 2O → SO 2 + 2HCl

The enthalpy of the reaction is 49.4 k J and entropy reaction is 336 J/K and calculate ∆ G?

Choices

Choice (4)Response

a.

-52 k J

b.

-51.4 k J

c.

52 k J

d.

51.4 k J

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