Chemistry-Physical and Chemical Changes (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 22 - 26 of 42

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Question number: 22

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Varsha adds a few drop of the universal indicator solution to a dilute solution of NaHCO3 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: 23

» 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: 24

» 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

Question number: 25

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Consider the following statements.

I. Chloralkali process is the process of electrolysis of NaCl solution.

II. During electrolysis, CI gas is produced at anode and H2 gas is produced at cathode.

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

Choices

Choice (4) Response

a.

I and II

b.

Only I

c.

I nor II

d.

Only II

Question number: 26

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Ammonia on combining with hydrochloric acid, form dense white fumes of

Choices

Choice (4) Response

a.

ammonium chloride

b.

ammonium perchlorate

c.

ammonium hydrogen carbonate

d.

All of the above

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