Chemistry (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 99 - 104 of 142

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Question number: 99

» Chemistry » Metals & Non Metals

MCQ▾

Question

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

Choices

Choice (4) Response

a.

CuO

b.

K2O

c.

Na2O

d.

Al2O3

Question number: 100

» 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: 101

» 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: 102

» Chemistry » Carbon and Its Compounds

MCQ▾

Question

Which of the following is the functional group for carboxylic acids?

Choices

Choice (4) Response

a.

- C = O - H

b.

C=OOH

c.

- O H

d.

C=O

Question number: 103

» 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

Question number: 104

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

In the presence of concentrated sulphuric acid H2SO4 , acetic acid reacts with ethyl alcohol to produce

Choices

Choice (4) Response

a.

Aldehyde

b.

Ester

c.

alcohol

d.

carboxylic acid

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