Chemistry-Physical and Chemical Changes (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 34 - 39 of 44

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Question number: 34

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

The changing of a solid directly into vapour on heating is called

Choices

Choice (4) Response

a.

Chromatography

b.

Crystallisation

c.

Sublimation

d.

Distillation

Question number: 35

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Consider the following statements

I. The first artificially synthesized organic molecule was urea.

II. Urea is also known as diaminomethanal.

Whichof the abovestatement (s) is/are correct?

Choices

Choice (4) Response

a.

I and II

b.

Neither I nor II

c.

Only II

d.

Only I

Question number: 36

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Equation

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 37

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

A gas can be liquefied by

Choices

Choice (4) Response

a.

Increasing the pressure and lowering the temperature

b.

Increasing the temperature

c.

Lowering the temperature

d.

Increasing the pressure

Question number: 38

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

A magnetic wire of dipole moment Equation is bent in the form of semi-circle. The new magnetic moment is

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

None of the above

Question number: 39

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Consider the following statements.

1. Carbonic acid is a weak acid.

2. Distilled water conduct electricity.

3. Dilute HC1 helps in digestion.

4. NaOH is a strong alkali.

Which of the statement (s) is/are incorrect?

Choices

Choice (4) Response

a.

1, 2 and 4

b.

Only 1

c.

Only 2

d.

Only 3

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