Chemical Reactions and Equation [NSO Level 1- Science Olympiad (SOF) Class 10]: Questions 1 - 7 of 114

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Question 1

Question MCQ▾

In the balanced equation

The value of the a, b, c and d, are respectively

Choices

Choice (4)Response

a.

1,1, 2,3

b.

2,3, 4,3

c.

1,2, 2,3

d.

1,3, 2,3

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Question 2

Question MCQ▾

Iron rusts more quickly in contact with_

Choices

Choice (4)Response

a.

Copper

b.

Zinc

c.

Potassium

d.

Calcium

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Question 3

Question MCQ▾

Which of the following is not a single displacement reaction?

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 4

Question MCQ▾

What will happen if ammonium chloride is heated?

Choices

Choice (4)Response

a.

Explosion will occur.

b.

Ammonium chloride will sublime on test tube

c.

Releases

d.

All of the above

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Question 5

Question MCQ▾

What does the color of the change when heated?

Choices

Choice (4)Response

a.

Colorless

b.

Dark blue

c.

Black

d.

None of the above

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Question 6

Question Match List-Ⅰ List-Ⅱ▾

Match both the columns and mark the correct option from the codes given below.

List-Ⅰ (Column I)List-Ⅱ (Column II)
(A)

(i)

Combination

(B)

(ii)

Decomposition

(C)

(iii)

Single displacement

(D)

(iv)

Double Displacement

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (iv)
  • (ii)
  • (i)
  • (iii)

b.

  • (iii)
  • (ii)
  • (i)
  • (iv)

c.

  • (iv)
  • (i)
  • (ii)
  • (iii)

d.

  • (iv)
  • (ii)
  • (iii)
  • (i)

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Question 7

Question Match List-Ⅰ List-Ⅱ▾

Match both the columns and mark the correct option from the codes given below.

List-Ⅰ (Column I)List-Ⅱ (Column II)
(A)

Reduction reaction

(i)

Decreasing the oxidation number

(B)

Oxidation reaction

(ii)

Increasing the oxidation number

(C)

Redox reaction

(iii)

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)

a.

  • (iii)
  • (i)
  • (ii)

b.

  • (i)
  • (ii)
  • (iii)

c.

  • (ii)
  • (iii)
  • (i)

d.

All of the above

Edit