NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 39 - 43 of 1259

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Question number: 39

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

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MCQ▾

Question

“All forms of energy can be converted into heat energy but heat cannot be converted into other forms of energy fully by any process ” is the statement of?

Choices

Choice (4)Response

a.

Thomson statement

b.

Boltzman statement.

c.

Kelvin –plank statement

d.

Calcius statement

Question number: 40

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

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Question

When a weak acid and a strong base are mixed in equal amounts, the heat evolved or change in enthalpy is?

Choices

Choice (4)Response

a.

b.

c.

d.

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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MCQ▾

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

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