Chemistry [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 184 - 188 of 208

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Question 184

Chemistry
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Question

MCQ▾

When a gas in transferred from small container to larger container, gas will occupy all the space available, because

Choices

Choice (4)Response

a.

Gas has no definite volume

b.

Gas has no definite shape

c.

Gas has no definite density

d.

Gas has no definite mass

Question 185

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Question

MCQ▾

When charge in removed, the particles will come nearer to each other and thus aggregates and settle down under the force of gravity?

Choices

Choice (4)Response

a.

Precipitation

b.

Coagulation

c.

Both a. and b. are correct

d.

None of the above

Question 186

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Question

MCQ▾

What is the formula to find maximum number of electrons in the main shell of an atom?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 187

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Question

MCQ▾

“In a chemical reaction, the sum of the mass of reactants and product remains constant” This statement known as?

Choices

Choice (4)Response

a.

Law of multiple proportion

b.

Law of definite proportion

c.

Law of conservation of mass

d.

None of the above

Question 188

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Question

MCQ▾

An emulsifier is a substance which?

Choices

Choice (4)Response

a.

Purifies the emulsion

b.

Helps in the dispersion of liquid in liquid

c.

Stabilises the emulsion

d.

Coagulator the emulsion