Physical and Chemical Changes (CBSE Class-7 Science): Questions 14 - 15 of 15

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Question number: 14

» Physical and Chemical Changes » Chemical Changes » Chemical Reactions and Its Examples

MCQ▾

Question

Chemical changes are:

Choices

Choice (4) Response

a.

Involves a chemical reaction

b.

Changes in which one or more new substances are formed

c.

Irreversible

d.

All a. , b. and c. are correct

Question number: 15

» Physical and Chemical Changes » Physical Changes » Properties of Physical Changes

MCQ▾

Question

Characteristics of physical changes are:

Choices

Choice (4) Response

a.

No loss or gain of energy takes place

AND

No change in mass occurs

b.

No formed new substance

c.

Reversible and temporary

d.

All a. , b. and c. are correct

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