NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 1943 - 1950 of 2028

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Question 1943

Question

MCQ▾

Which of the following element can replace magnesium from its salt?

Choices

Choice (4)Response

a.

Calcium

b.

Zinc

c.

Iron

d.

Aluminium

Question 1944

Question

MCQ▾

In which of the following alloys, - Copper is a component?

Choices

Choice (4)Response

a.

Nichrome

b.

Bronze

c.

Steel

d.

Solder

Question 1945

Question

MCQ▾

Which of the following can cause acid rains?

Choices

Choice (4)Response

a.

Carbon monoxide

b.

Carbon dioxide

c.

Sulphur oxides and nitrogen oxides

d.

Deforestation

Question 1946

Question

MCQ▾

What are the products formed in foam type fire extinguished?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 1947

Question

MCQ▾

How many number of electrons present in Valence shell of metals generally?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 1948

Question

MCQ▾

What type of reaction is “combustion” ?

Choices

Choice (4)Response

a.

Displacement reaction

b.

Reduction reaction

c.

Exothermic reaction

d.

Endothermic reaction

Question 1949

Question

MCQ▾

Which of the following gas is displaced when metal reacted with and ?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 1950

Question

MCQ▾

The temperature (lowest) at which substance starts burning is termed as?

Choices

Choice (4)Response

a.

Boiling point

b.

Minimum temperature

c.

Ignition temperature

d.

Critical temperature

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