NSO Level 1- Science Olympiad (SOF) Class 10: Questions 814 - 816 of 986

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Question number: 814

» Chemical Reactions and Equation

Edit
Match List-Ⅰ List-Ⅱ▾

Question

Match both the columns and mark the correct option using the coded given below.

List-Ⅰ (Column I) List-Ⅱ (Column II)

(A)

Copper nitrate

(i)

Nitrogen Dioxide

(B)

Heating washing soda

(ii)

Carbon dioxide

(C)

Heating ammonium dichromate

(iii)

Water vapor

(D)

Heating Sugar

(iv)

Carbon dioxide and Water

Choices

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

a.

  • (iv)
  • (iii)
  • (ii)
  • (i)

b.

  • (iii)
  • (iv)
  • (ii)
  • (i)

c.

  • (ii)
  • (i)
  • (iii)
  • (iv)

d.

  • (iii)
  • (i)
  • (ii)
  • (iv)

Question number: 815

» Acids, Bases and Salts

Edit
MCQ▾

Question

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 number: 816

» Magnetic Effects of Electric Current

Edit
MCQ▾

Question

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

An Electric Current Passes

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