Stoichiometry - Section 1 (3)

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Stoichiometry - Section 1

In this section, you will find the problem and MCQs related to this field and
you can solve them easily without any problem.

17.

Pick out the wrong statement.

A.	'Reduced temperature' of a substance is the ratio of its existing temperature to its critical temperature, both expressed on celsius scale.
B.	'Reduced pressure' is the ratio of the existing pressure of a substance to its critical pressure.
C.	'Reduced volume' is the ratio of the existing molal volume of a substance to its critical molal volume.
D.	none of these.

Answer: Option A

Explanation:

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18.

With rise in pressure, the solubility of gases in solvent, at a fixed temperature

A.	increases
B.	decreases
C.	remains unchanged
D.	decreases linearly

Answer: Option A

Explanation:

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19.

S.T.P. corresponds to

A.	1 atm. absolute pressure & 15.5°C.
B.	760 mm Hg gauge pressure & 15.5°C.
C.	760 torr & 0°C.
D.	101.325 kPa gauge pressure & 15.5°C.

Answer: Option A

Explanation:

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20.

Specific gravity on API scale is given by the relation(where, G = specific gravity at 15.5°C).

A.	°API = 200(G - 1)
B.	°API = (141.5/G) - 131.5
C.	°API = (140/G) - 130
D.	°API = 145 - (145/G)

Answer: Option B

Explanation:

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21.

N₂ content in a urea sample was found to be only 42%. What is the actual urea content of the sample ? (molecular weight of urea = 60)

A.	80%
B.	90%
C.	95%
D.	98%

Answer: Option B

Explanation:

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22.

Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the

A.	same elevation in boiling point.
B.	different elevation in boiling point.
C.	elevation in boiling point in the ratio of their molecular weights.
D.	none of these.

Answer: Option A

Explanation:

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23.

In case of a ternery system involving two liquid components and a solute, the ratio of the concentration of the solute in the two phases at equilibrium is called the distribution co-efficient. The distribution co-efficient depends upon the

A.	solute concentration
B.	temperature
C.	both(a) & (b)
D.	neither (a) nor (b)

Answer: Option C

Explanation:

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24.

Pick out the wrong statement.

A.	The effect of pressure on heat capacity of gases at pressure above one atmosphere and above the critical temperature is negligible.
B.	The value of Cp of gases increases with increase in pressure, above atmospheric pressure.
C.	The value of Cp at critical temperature and pressure reaches infinity.
D.	all (a), (b), and (c).

Answer: Option A

Explanation:

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