Chemical Engineering - Stoichiometry

11. 

Molar heat capacity of water in equilibrium with ice at constant pressure is

A. 0
B.
C. 1
D. none of these

Answer: Option B

Explanation:

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12. 

If pH value of a solution is 8, then its pOH value will be

A. 6
B. 1
C. 7
D. 10

Answer: Option A

Explanation:

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13. 

The chemical nature of an element is independent of

A. its atomic number.
B. the number of protons or electrons present in it.
C. the number of neutrons present in it.
D. none of these.

Answer: Option C

Explanation:

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14. 

The heat change for the reaction, C(s) + 2S(s) → CS2(l), is 104.2 kJ. It represents the heat of

A. formation
B. solution
C. combustion
D. fusion

Answer: Option A

Explanation:

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15. 

A sample of well water contains 140 gm/m3 Ca2+ ions and 345 gm/m3 Na+ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO3 in gm/m3 is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16)

A. 350
B. 485
C. 140
D. 345

Answer: Option A

Explanation:

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