Stoichiometry MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Stoichiometry, a fundamental topic in the field of Basic Chemical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Stoichiometry MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Stoichiometry mcq questions that explore various aspects of Stoichiometry problems. Each MCQ is crafted to challenge your understanding of Stoichiometry principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Basic Chemical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Stoichiometry MCQs are your pathway to success in mastering this essential Basic Chemical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Stoichiometry. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Stoichiometry knowledge to the test? Let's get started with our carefully curated MCQs!

Stoichiometry MCQs | Page 12 of 42

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Q111.
The depression in freezing point of a solution is

a.

inversely proportional to the mass of solvent.

b.

directly proportional to the mole of solute.

c.

both (a) and (b).

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) and (b).
Q112.
For the gaseous phase reaction,

Nโ‚‚ + Oโ‚‚ โ†” 2NO, ฮ”H = + 80 kJ/kg. mole;

the decomposition of NO is favoured by

a.

increasing the concentration of Nโ‚‚.

b.

decrease in temperature.

c.

increase in pressure.

d.

decrease in pressure.

Discuss
Answer: (b).decrease in temperature.
Q113.
Pick out the correct statement.

a.

Heat of solution is always positive.

b.

At equilibrium, ฮ”G is zero.

c.

For the reaction, PClโ‚… โ†” PClโ‚ƒ + Clโ‚‚, ฮ”G is less than ฮ”E

d.

The heating of water in a beaker is an example of an isolated system.

Discuss
Answer: (b).At equilibrium, ฮ”G is zero.
Q114.
In case of a solution (not of a solid in a liquid), whose total volume is less than the sum of the volumes of its components in their pure states, solubility is

a.

independent of temperature.

b.

increases with rise in pressure.

c.

increased with decrease in pressure.

d.

unchanged with pressure changes.

Discuss
Answer: (b).increases with rise in pressure.
Q115.
Pure oxygen is mixed with air to produce an enriched air containing 50 volume % of oxygen. The ratio of moles of air to oxygen used is

a.

1.72

b.

0.58

c.

0.5

d.

0.2

Discuss
Answer: (b).0.58
Q116.
Pick out the correct statement.

a.

A substance existing above its critical temperature is called a saturated vapor.

b.

A mixture of vapor gas is called saturated, if the equilibrium vapor pressure of the liquid is more than the partial pressure of the vapor at the same temperature.

c.

Heat added to or given up by a substance at constant temperature is called the sensible heat.

d.

The end points of a vapor-pressure vs. temperature curve are critical and triple points.

Discuss
Answer: (d).The end points of a vapor-pressure vs. temperature curve are critical and triple points.
Q117.
Normality of a solution does not change with the increase in the

a.

pressure

b.

temperature

c.

solute concentration

d.

dilution of the solution

Discuss
Answer: (a).pressure
Q118.
For an endothermic reaction, the minimum value of energy of activation will be (where, ฮ”H = enthalpy of the reaction)

a.

ฮ” H

b.

>ฮ”H

c.

<ฮ”H

d.

0

Discuss
Answer: (b).>ฮ”H
Q119.
Isotopes are atoms having the same

a.

mass number

b.

number of neutrons

c.

atomic mass

d.

none of these

Discuss
Answer: (d).none of these
Q120.
500 c.c. each of hydrogen at 700 mm Hg pressure and oxygen at 600 mm Hg pressure are put together in a vessel of 1 litre capacity. The final pressure of the gas mixture will be __________ mm Hg.

a.

650

b.

700

c.

600

d.

375

Discuss
Answer: (a).650
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