Chemistry [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 155 - 162 of 208

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Question 155

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Question

MCQ▾

Fog is commonly seen in winter season. It is a colloidal solution of?

Choices

Choice (4)Response

a.

Liquid particles dispersed in gas

b.

Solid particles dispersed in liquid

c.

Gaseous particles dispersed in liquid

d.

Solid particles dispersed in gas

Question 156

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Question

MCQ▾

What does the valency ‘say’ about?

Choices

Choice (4)Response

a.

The combining capacity of an element

b.

The atomicity of an element

c.

The oxidation number of an element

d.

Question does not provide sufficient data or is vague

Question 157

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Question

MCQ▾

Ice-cream belongs to which type of category?

Choices

Choice (4)Response

a.

Emulsion

b.

Suspension

c.

Element

d.

Solution

Question 158

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Question

MCQ▾

Which of the following pairs are known as isotopes?

Choices

Choice (4)Response

a.

b.

c.

Diamond and graphite

d.

Question 159

Chemistry
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Question

MCQ▾

Which of the following is the freezing point of pure water?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 160

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Question

MCQ▾

Calculate the mass of gram atom of oxygen?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 161

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Question

MCQ▾

Positive ions are formed from neutral atoms by the loss of?

Choices

Choice (4)Response

a.

Nuclear charge

b.

Protons

c.

Electrons

d.

Neutrons

Question 162

Chemistry
Edit

Question

MCQ▾

Select the metal from the following, which is not a solid at room temperature?

Choices

Choice (4)Response

a.

Mercury

b.

Aluminium

c.

Iron

d.

Steel