NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 1957 - 1963 of 2028

Access detailed explanations (illustrated with images and videos) to 2028 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Subscription can be renewed yearly absolutely FREE! View Sample Explanation or View Features.

Rs. 550.00 or

How to register?

Question number: 1957

» Chemistry » Pollution of Air and Water

Edit
MCQ▾

Question

Which of the following pollutant involved and causes acid rains other than sulphur dioxide?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1958

» Chemistry » Pollution of Air and Water

Edit
MCQ▾

Question

Ozone layer is said to a protective layer because?

Choices

Choice (4) Response

a.

It reduces the amount of ultraviolet rays reaching the earth

b.

It is used by living organisms for respiration

c.

If reflects the heat from the earth back into the atmosphere

d.

It increases the temperature of the earth

Question number: 1959

» Chemistry » Pollution of Air and Water

Edit
MCQ▾

Question

When huge amount of sewage is dumped in a river, the BOD will?

Choices

Choice (4) Response

a.

Increase

b.

Decrease

c.

Remain Unchanged

d.

Increase or Decrease

Question number: 1960

» Chemistry » Pollution of Air and Water

Edit
MCQ▾

Question

Monument of marble can be damaged by?

Choices

Choice (4) Response

a.

Pesticide pollution

b.

Pollution

c.

Dust Particles

d.

Pollution

Question number: 1961

» Chemistry » Pollution of Air and Water

Edit
MCQ▾

Question

What is the compound A which in known to be a particulate?

Choices

Choice (4) Response

a.

b.

c.

d.

All of the above

Question number: 1962

» Chemistry » Pollution of Air and Water

Edit
MCQ▾

Question

Which of the following gas is associated with greenhouse effect?

Choices

Choice (4) Response

a.

Oxygen

b.

Carbon dioxide

c.

Sulphur dioxide

d.

Nitrogen dioxide

Question number: 1963

» Chemistry » Synthetic Fibers and Plastics

Edit
MCQ▾

Question

Which of the following are exact properties of nylon?

Choices

Choice (4) Response

a.

Transparent, light and easy to wash

b.

Soft, strong and light

c.

Strong, clastic and light

d.

Hard, inexpensive and strong

Developed by: