Chemical Thermodynamics-First Law of Thermodynamics (NEET Chemistry): Questions 16 - 20 of 23

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Question number: 16

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

MCQ▾

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.

1.37KCal

b.

<13.7KCal

c.

13.7KCal

d.

>13.7KCal

Question number: 17

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

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: 18

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

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 sublimation

c.

Enthalpy of fusion

d.

Enthalpy of vaporization

Question number: 19

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

MCQ▾

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.

210.73 J/mol

b.

106.96 J/mol

c.

17.57 J/mol

d.

35.15J/mol

Question number: 20

» Chemical Thermodynamics » First Law of Thermodynamics » Endothermic Reactions

MCQ▾

Question

When ammonium chloride is dissolved in water, the solution becomes cold, the change is?

Choices

Choice (4) Response

a.

Adiabatic

b.

Super cooling

c.

Exothermic

d.

Endothermic

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