NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 2017 - 2022 of 2028

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Question 2017

Question

MCQ▾

Which are the primary constituents of photo chemical smog?

Choices

Choice (4)Response

a.

Hydrocarbons & CFCs.

b.

And

c.

and hydrocarbons

d.

Question 2018

Question

MCQ▾

The process in which threads from cocoon are taking out in called or known as?

Choices

Choice (4)Response

a.

Reeling

b.

Rearing

c.

Sorting

d.

Scouring

Question 2019

Question

MCQ▾

Electrical disturbances in the atmosphere (troposphere) initiates reactions between nitrogen and?

Choices

Choice (4)Response

a.

Water vapour

b.

Oxygen & water

c.

Sulphur

d.

All of the above

Question 2020

Question

MCQ▾

What are the exhausting gases from automobile vehicles?

(I) Carbon dioxide

(II) Sulphur dioxide

(III) Oxides of nitrogen

Choices

Choice (4)Response

a.

I and II only

b.

I & III only

c.

II, and III only

d.

I, II, III

Question 2021

Question

MCQ▾

In the process of obtaining silk, the rearing of silk warms is called?

Choices

Choice (4)Response

a.

Sericulture

b.

Pisciculture

c.

Arboriculture

d.

All of the above

Question 2022

Question

MCQ▾

The leaching of chemical fertilizers into rivers and ponds cause

Choices

Choice (4)Response

a.

Increase the oxygen levels of water

b.

Increase in number of aquatic organisms

c.

Air pollution

d.

The rapid growth of algal

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