NSO Level 1- Science Olympiad (SOF) Class 10: Questions 890 - 892 of 986

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Question number: 890

» Our Environment and Its Management

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MCQ▾

Question

Which group of organisms are not constituents of a food chain?

(i) Grass, lion, rabbit, wolf

(ii) Plankton, man, fish, grasshopper

(iii) Wolf, grass, snake, tiger

(iv) Frog, snake, eagle, grass, grasshopper

Choices

Choice (4) Response

a.

(iii) and (iv)

b.

(i) and (iv)

c.

(i) and (iii)

d.

(ii) and (iii)

Question number: 891

» Chemical Reactions and Equation

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MCQ▾

Question

Two students noted the initial colour of the solutions kept in breakers, After inserting rods in each solution and leaving it undisturbed for two hours, the colour of each solution was again noted.

Observation for the chemical reaction

Observation for the Chemical Reaction

The observation for metal and salt solution in which added, chemical reaction is showing in figure.

They recorded their observations in the form of table given below:

Table of the Color of the solution

Table of the Color of the solution

Student

Colour of the solution

A

Initial

Final

Colorless

Colorless

Colorless

Colorless

Colorless

Colorless

Blue

Light green

B

Initial

Final

Colorless

Colorless

Light Green

Colorless

Colorless

Colorless

Blue

Reddish brown

Which student noted the colour change in all the two beakers correctly?

Choices

Choice (4) Response

a.

B student

b.

A student

c.

All of the above

d.

None of the above

Question number: 892

» Chemical Reactions and Equation

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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)

Heating Copper sulphate pentahydrate

(i)

Carbon dioxide

(B)

Heating limestone

(ii)

Hydrogen chloride

(C)

Heating Potassium chlorate

(iii)

Copper sulphate

(D)

Heating ammonium chloride

(iv)

Oxygen

Choices

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

a.

  • (iii)
  • (iv)
  • (i)
  • (ii)

b.

  • (iii)
  • (i)
  • (iv)
  • (ii)

c.

  • (iv)
  • (i)
  • (iii)
  • (ii)

d.

  • (iv)
  • (iii)
  • (ii)
  • (i)