Chemistry (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 76 - 81 of 144

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Question number: 76

» Chemistry » Structure of Atom

MCQ▾

Question

The electronic configuration of an ion M 2+ is 2,8 and 14. If its mass is 56, the number of neutrons in its nucleus is

Choices

Choice (4) Response

a.

34

b.

30

c.

42

d.

32

Question number: 77

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

The reaction is interpreted as

Choices

Choice (4) Response

a.

is getting reduced and is getting oxidized

b.

Only is oxidized

c.

and are reduced

d.

is getting oxidized and is getting reduced

Question number: 78

» Chemistry » Metals & Non Metals

MCQ▾

Question

Which one of the following metal oxides shows both acidic and basic characters?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 79

» Chemistry » Structure of Atom

MCQ▾

Question

Structures of nuclei of three atoms A, B and C are given below.

A has 90 protons and 146 neutrons B has 92 protons and 146 neutrons C has 90 protons and 148 neutrons

Based on the above data, which of these atoms are isotopes and which are isobars?

Choices

Choice (4) Response

a.

A and C are isotopes, A and B are isobars

b.

A and B are isotopes, A and C are isobars

c.

A and C are isotopes, B and C are isobars

d.

B and C are isobars, A and B are isotopes

Question number: 80

» Chemistry » Acid Bases and Salt

MCQ▾

Question

The normality of 0.3 M phosphoric acid is

Choices

Choice (4) Response

a.

0.1

b.

0.3

c.

0.9

d.

0.6

Question number: 81

» Chemistry » Structure of Atom

MCQ▾

Question

Which of the following gases’ is known as tear gas?

Choices

Choice (4) Response

a.

Sulphur dioxide

b.

Chloropicrin

c.

Methyl isocyanides

d.

Nitrous oxide

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