Chemistry (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 11 - 15 of 142

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Question number: 11

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Consider the following statements.

Choices

Choice (4) Response

a.

Dilute HC1 helps in digestion

b.

Carbonic acid is a weak acid.

c.

Distilled water conduct electricity.

d.

NaOH is a strong alkal

Question number: 12

» Chemistry » Structure of Atom

MCQ▾

Question

What are isotopes?

Choices

Choice (4) Response

a.

Elements having same atomic masses but different atomic numbers

b.

Elements having same atomic numbers but number of protons is different

c.

Elements having different atomic masses but same atomic numbers

d.

Elements having same atomic numbers as well as atomic masses

Question number: 13

» Chemistry » Carbon and Its Compounds

MCQ▾

Question

The formula for the carboxylic acid functional group is

Choices

Choice (4) Response

a.

Various functional group bonds given – Choice A

Various Functional Group Bonds Given – Choice A

Here are the various functional groups explained

b.

 Various functional group bonds given – Choice B

Various Functional Group Bonds Given – Choice B

Here are the various functional groups explained

c.

 Various functional group bonds given – Choice C

Various Functional Group Bonds Given – Choice C

Here are the various functional groups explained

d.

Various functional group bonds given – Choice D

Various Functional Group Bonds Given – Choice D

Here are the various functional groups explained

Question number: 14

» Chemistry » Structure of Atom

MCQ▾

Question

Calculate the mass of 1 mole of NaCl. (Given atomic mass of Na-23, Cl- 35.5)

Choices

Choice (4) Response

a.

11.2 gms

b.

11.8 gms

c.

58.5 gms

d.

56 gms

Question number: 15

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

On adding ethanoic acid to NaHC0 3, what will happen?

Choices

Choice (4) Response

a.

NO 2 gas is evolved

b.

CO 2 gas is evolved

c.

O 2 gas is evolved

d.

SO 2 gas is evolved

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