Chemical Thermodynamics-First Law of Thermodynamics [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Chemistry]: Questions 1 - 7 of 73

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Question 1

Question MCQ▾

When 50 g of iron is dissolved in HCl at 25°C in an open vessel and atmospheric pressure is 1 atm, calculate the work done?

Choices

Choice (4)Response

a.

-22.123 J

b.

-21.84 J

c.

22.123 J

d.

-2212.39 J

Edit

Question 2

Question MCQ▾

Heat of formation of 2 moles of NH3 (G) is -90 KJ , bond energies of H-H and N-H bonds are 435 KJ and 390 KJ/mol. The value of the bond energy?

Choices

Choice (4)Response

a.

-472.5 KJ

b.

945 KJ

c.

-945 KJ

d.

472.5 KJ

Edit

Question 3

Question MCQ▾

A gas expands, isothermally and irreversibly the work done by gas is?

Choices

Choice (4)Response

a.

Maximum

b.

Minimum

c.

Average

d.

Zero

Edit

Question 4

Question MCQ▾

Bomb calorimeter proceeds at constant?

Choices

Choice (4)Response

a.

Weight

b.

Volume

c.

Pressure

d.

Temperature

Edit

Question 5

Question MCQ▾

One mole of a gas is heated at constant pressure to raise its temperature by 1°C. The work done in joules is?

Choices

Choice (4)Response

a.

-16.62

b.

- 4.3

c.

19.4

d.

- 8.314

Edit

Question 6

Question MCQ▾

Determine the heat of transformation of C (diamond) ⇾ C (graphite) ?

Choices

Choice (4)Response

a.

0.5 kcal

b.

5.0 kcal

c.

-0.5 kcal

d.

-5.0 kcal

Edit

Question 7

Question MCQ▾

The compounds which have negative enthalpies of formation are known as

Choices

Choice (4)Response

a.

endothermic compounds

b.

exothermic compounds

c.

allotropic compounds

d.

isothermal compounds

Edit