Chemistry-Physical and Chemical Changes (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 14 - 18 of 44

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Question number: 14

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

A large iceberg melts at the base but not at the top because

Choices

Choice (4) Response

a.

higher pressure at the base lowers the melting point of ice

b.

ice at the base contains impurities

c.

the base of iceberg remains in warmer conditions

d.

ice at the top is different kind

Question number: 15

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Which of these methods is used to extract alcohol from a mixture of alcohol and water?

Choices

Choice (4) Response

a.

Oxidation

b.

Bleaching

c.

Crystallization

d.

Distillation

Question number: 16

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Varsha adds a few drop of the universal indicator solution to a dilute solution of Equation taken in a test-tube. She observed………colour.

A test-tube containing dilute solution of NaHCO3

A Test-Tube Containing Dilute Solution of NaHCO3

Find colour of mixture after adding universal indicator solution in test-tube

Choices

Choice (4) Response

a.

green

b.

Yellow

c.

mustard

d.

blue

Question number: 17

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Consider the following statements

I. Pyrolusite is the ore of zinc.

II. Calamine is the ore of manganese.

Which of the above statement (s) is/are correct?

Choices

Choice (4) Response

a.

I and II

b.

I nor II

c.

Only I

d.

Only II

Question number: 18

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

When hydrogen and oxygen combined chemically in a fixed ratio of 1: 8 by weight, X is obtained. X

Choices

Choice (4) Response

a.

is homogeneous

b.

can be separated into its constituent by physical methods.

c.

has fixed melting point

d.

has properties quite different from hydrogen and oxygen

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