NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 41 - 45 of 1258

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Question number: 41

» Chemical Thermodynamics » First Law of Thermodynamics » Hess's Law of Constant Heat Summation

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MCQ▾

Question

Which of the following statement is correct about Hess law?

Choices

Choice (4) Response

a.

Heat of reaction depends on the sum of enthalpies of products + enthalpies of reactants

b.

Heat of reaction depends on the sum of enthalpies of products-enthalpies of reactants

c.

Heat of reaction depend on the time of process

d.

Heat of formation of compound is dependent of manner of its formation.

Question number: 42

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

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MCQ▾

Question

Heat change in converting 1 mole of a solid directly into its vapor at a given temperature below its melting point is known as?

Choices

Choice (4) Response

a.

Enthalpy of combustion

b.

Enthalpy of vaporization

c.

Enthalpy of fusion

d.

Enthalpy of sublimation

Question number: 43

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

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Question

Calculate the temperature at which liquid water will be in equilibrium with water vapor?

∆ H VAP = 40.73 k J/mol ∆ S = 0.109 kJ/mol. K?

Choices

Choice (4) Response

a.

472.8 K

b.

373.6 K

c.

364.3 K

d.

498.6 K

Question number: 44

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

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Question

If the values of ∆H° f of ICl (g), Cl (g) and I (g) are respectively 17.57,121.34,106.96 J/mol. The value of I-Cl bond energy in J/mol is?

Choices

Choice (4) Response

a.

106.96 J/mol

b.

210.73 J/mol

c.

17.57 J/mol

d.

35.15J/mol

Question number: 45

» Chemical Thermodynamics » State Functions » Internal Energy

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MCQ▾

Question

Which one of the following statement is not correct regarding the internal energy?

Choices

Choice (4) Response

a.

The change in internal energy depends on the path by which the final stage is reached.

b.

Internal energy is an extensive property.

c.

There is no change in internal energy in a cyclic process.

d.

Internal energy is a state property