Chemistry-Chemical Reactions and Equations [NSTSE (National Science Talent Search Exam- Unified Council) Class 10]: Questions 1 - 8 of 30

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Question 1

Chemical Reactions and Equations

Question

MCQ▾

Select the reaction which is completely balanced?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 2

Chemical Reactions and Equations

Question

MCQ▾

Which of the following chemical equation is not balanced?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 3

Chemical Reactions and Equations

Question

MCQ▾

What are formed as a result of a chemical reaction?

Choices

Choice (4)Response

a.

Reactants

b.

Compounds

c.

Products

d.

Mixtures

Question 4

Chemical Reactions and Equations

Question

MCQ▾

The reaction in which an atom or group of atoms present in a molecule displaced by another atom?

Choices

Choice (4)Response

a.

Decomposition reaction

b.

Synthesis

c.

Displacement reaction

d.

Double displacement reaction

Question 5

Chemical Reactions and Equations

Question

MCQ▾

is … reaction?

Choices

Choice (4)Response

a.

Decomposition reaction

b.

Displacement reaction

c.

Double displacement reaction

d.

Combination reaction

Question 6

Chemical Reactions and Equations

Question

MCQ▾

The phenomenon of formation of by the oxidation of is known as.

Choices

Choice (4)Response

a.

Auto reduction

b.

Auto oxidation

c.

Redox reaction

d.

All of the above

Question 7

Chemical Reactions and Equations

Question

MCQ▾

In order to balance the given equation, what does ‘x’ stands for?

Choices

Choice (4)Response

a.

3

b.

1

c.

2

d.

5

Question 8

Chemical Reactions and Equations

Question

MCQ▾

Which substance is reduced in the above reaction?

Choices

Choice (4)Response

a.

b.

c.

d.

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