NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 26 - 32 of 1259

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Question number: 26

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

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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.

891.0KJ

b.

89.1 KJ

c.

-891.1 KJ

d.

-89.1 KJ

Question number: 27

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

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MCQ▾

Question

The calorific value of methane is?

Choices

Choice (4)Response

a.

-150 KJ/g

b.

-48 KJ/g

c.

-55.6 KJ/g

d.

-33 KJ/g

Question number: 28

» States of Matter » Solid State » Unit Cell and Lattices

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MCQ▾

Question

The formula for the calculation of heat evolved in water calorimeter?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 29

» Chemical Thermodynamics » First Law of Thermodynamics » Work

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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.

28.72

b.

-14.7

c.

-56.72

d.

-28.72

Question number: 30

» Chemical Thermodynamics » State Functions » Internal Energy

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MCQ▾

Question

Which of the following unit represents largest amount of energy?

Choices

Choice (4)Response

a.

Erg

b.

Electron volt

c.

Joule

d.

Carrie

Question number: 31

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

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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.

-68 KJ

b.

72 KJ

c.

-70 KJ

d.

-72 KJ

Question number: 32

» Chemical Thermodynamics » State Functions » Entropy

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MCQ▾

Question

The enthalpy change, for the transition of liquid water to steam, ∆ H vapour is 40.8 KJ/mol at 373K. Calculate the entropy change for process?

Choices

Choice (4)Response

a.

b.

c.

d.

109.38 J/K m o l

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