Reactions and Rate of Reaction MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Reactions and Rate of Reaction, a fundamental topic in the field of Chemistry. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Reactions and Rate of Reaction 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 Reactions and Rate of Reaction mcq questions that explore various aspects of Reactions and Rate of Reaction problems. Each MCQ is crafted to challenge your understanding of Reactions and Rate of Reaction principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Chemistry tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Reactions and Rate of Reaction MCQs are your pathway to success in mastering this essential Chemistry topic.

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Reactions and Rate of Reaction MCQs | Page 21 of 35

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Q201.
Consider the reaction: Na(s) + H₂O → NaOH(aq) + H₂(g). Moles of H₂O required to balance the equation will be

a.

1

b.

2

c.

3

d.

4

Discuss
Answer: (b).2
Q202.
If Mg(s) is allowed to react with H₂O(l), the product other than H₂(g) will be

a.

MgO(s)

b.

MgO(aq)

c.

Mg(OH)₂ (aq)

d.

Mg₂O₃(s)

Discuss
Answer: (c).Mg(OH)₂ (aq)
Q203.
Consider the reaction: Na(s) + H₂O(l) → NaOH(aq) + H₂(g). Moles of Na required to balance the equation are

a.

1

b.

2

c.

3

d.

4

Discuss
Answer: (b).2
Q204.
The formula MgO shows Mg oxidation number to be

a.

+1

b.

+2

c.

−1

d.

−2

Discuss
Answer: (b).+2
Q205.
Consider the equation: Mg(s) + H₂O(l) → Mg(OH)₂(aq) + H₂(g). Moles of Mg(s) required to balance the equation will be

a.

1

b.

2

c.

3

d.

4

Discuss
Answer: (a).1
Q206.
When allowed to react with cold water, the element that reacts vigorously to produce H₂(g) is

a.

Na(s)

b.

Mg(s)

c.

Al(s)

d.

Ca(s)

Discuss
Answer: (a).Na(s)
Q207.
The element that reacts vigorously with cold water among the following is

a.

Na(s)

b.

Mg(s)

c.

Ca(s)

d.

Al(s)

Discuss
Answer: (a).Na(s)
Q208.
The pH of Mg(OH)₂ produced after Mg(s) and H₂O(l) reaction is

a.

1 to 4

b.

5 to 7

c.

8 to 11

d.

12 to 14

Discuss
Answer: (c).8 to 11
Q209.
Metal that reacts vigorously with cold water to produce a strongly alkaline solution is

a.

Na(s)

b.

Mg(s)

c.

Al(s)

d.

S(s)

Discuss
Answer: (a).Na(s)
Q210.
Which is incorrect about the characteristics of Group II elements?

a.

The metals act as reducing agents.

b.

The metals are reduced when they react.

c.

The metals of Group II loose electrons

d.

The metals of Group II are reactive metals

Discuss
Answer: (b).The metals are reduced when they react.
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