Stoichiometry - Section 1 (5)

Directions to Solve

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.

33.

One micron is equal to

A.	10-4 mm
B.	10-4 cm
C.	10-6 m
D.	both(b)&(c)

Answer: Option D

Explanation:

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34.

Assuming that CO₂ obeys perfect gas law, calculate the density of CO₂ (in kg/m³) at 263°C and 2 atm.

A.	1
B.	2
C.	3
D.	4

Answer: Option B

Explanation:

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35.

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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36.

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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37.

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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38.

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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39.

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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40.

A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the

A.	atomic weight of the metal is 4.
B.	equivalent weight of the metal is 4.
C.	atomic weight of the metal is 2.
D.	equivalent weight of the metal is 8.

Answer: Option B

Explanation:

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