NSO Level 1- Science Olympiad (SOF) Class 9: Questions 548 - 552 of 1128

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Question 548

Question

MCQ▾

To ensure the supply of pure fish seed in desired quantities, one method can be

Choices

Choice (4)Response

a.

Hibernation

b.

Cross fertilization

c.

Hybridisation

d.

Hormonal stimulation

Question 549

Question

MCQ▾

The chemical symbol for sodium is

Choices

Choice (4)Response

a.

b.

N

c.

d.

S

Question 550

Question

MCQ▾

Label X in the following diagram

Diagram of the Section of a Stem

Choices

Choice (4)Response

a.

Phloem

b.

Stomata

c.

Chloroplast

d.

Guard cell

Question 551

Question

MCQ▾

Arrange the steps of fractional distillation of air in the correct order.

  1. Air is compressed by increasing the pressure
  2. Air is cooled by decreasing the temperature to get liquid air.
  3. Liquid air is allowed to warm up slowly in a fractionating column.
  4. Gases get separated at different heights depending on their boiling points.

Choices

Choice (4)Response

a.

1,2, 4,3

b.

1,4, 2,3

c.

1,3, 2,4

d.

1,2, 3,4

Question 552

Question

MCQ▾

Sweety washed her clothes on a sunny day and spread them for drying. All the clothes were dried within 1 hour. She checked the atmospheric temperature. It was 38°C. Water boils at 100°C temperature. How did the clothes dried up at 40°C? The possible explanation is

1) There was no water in the washed clothes.

2) Evaporation takes place below 100°C also.

3) She has spread the clothes completely.

4) All of above

Choices

Choice (4)Response

a.

2 & 3

b.

1 & 4

c.

1 & 2

d.

1 & 3

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