NSO Level 1- Science Olympiad (SOF) Class 10: Questions 815 - 817 of 986

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Question 815

Question

MCQ▾

Read the paragraph and Answer the question.

On heating sodium carbonate and water, it gives Washing soda Washing soda is used for glass, soap and paper industries, cleaning agent for domestic purposes etc.

Ratio of water molecules in sodium carbonate: Washing soda is

Choices

Choice (4)Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

Question 816

Question

MCQ▾

An electric current passes through a straight wire in the direction of south to north. Magnetic compasses are placed at points A and B as shown in the figure.

An Electric Current Passes

What is your observation?

Choices

Choice (4)Response

a.

The needles will deflect in the opposite directions

b.

The needle will not deflect

c.

Motor Only one of the needles will deflect

d.

The needles will deflect in the same direction

Question 817

Question

Match List-Ⅰ List-Ⅱ▾

Match the column I and column II for Image formation by a concave mirror and the select the correct option from the coded given below:

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

At infinity

(i)

Formed between O and

(B)

At the center

(ii)

Between O and

(C)

Between O and Infinity

(iii)

Formed at

(D)

Between O and F

(iv)

At infinity

Choices

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

a.

  • (iii)
  • (iv)
  • (i)
  • (ii)

b.

  • (iv)
  • (i)
  • (iii)
  • (ii)

c.

  • (i)
  • (ii)
  • (iii)
  • (iv)

d.

  • (ii)
  • (iv)
  • (i)
  • (iii)

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