Chemistry (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 16 - 21 of 142

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Question number: 16

» Chemistry » Carbon and Its Compounds

MCQ▾

Question

Ionic compounds

Choices

Choice (4) Response

a.

They can conduct electricity

b.

These are soluble in water

c.

They possess high melting points Identify the wrong statement.

d.

These are usually amorphous solids

Question number: 17

» Chemistry » Structure of Atom

MCQ▾

Question

Consider the following facts regarding plaster of Paris

Choices

Choice (4) Response

a.

It is a white powder.

b.

It is prepared from calcium sulphate dehydrate.

c.

Its general formula is CaS0 4 and 2H2O.

d.

Both a. and b. are correct

Question number: 18

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

Who compared the properties of elements with notations of music and propounded ‘law of octaves’ for the classification of elements?

Choices

Choice (4) Response

a.

Newland

b.

Mendeleef

c.

Dobereiner

d.

Lothal Mayer

Question number: 19

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

An element X forms and oxide X 2 O 3. In which group of Mendeleef s periodic table is this element located?

Choices

Choice (4) Response

a.

Group II

b.

Group III

c.

Group VIII

d.

Group V

Question number: 20

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

On adding dilute HCl to granulated zinc placed in a test tube, the observation made is

Choices

Choice (4) Response

a.

the surface of the metal turns shining

b.

the reaction mixture turns milky.

c.

a colorless and odourless gas evolves with bubbles.

d.

odour of chlorine is observed.

Question number: 21

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

In the reaction, 2H 2 S + SO 2

3S + 2H 2 O

Choices

Choice (4) Response

a.

SO 2 is the reducing agent

b.

H 2 S has been oxidized

c.

SO 2 has been oxidized

d.

H 2 S is the oxidising agent

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