Question

1. Chemical changes are :


a) reversible

b) irreversible

c) temporary

d) all of these


2. Which of the following is /are magnetic substances ?

a) iron

b) cobalt

c) nickel

d) all of these

3. Most of the substances whether solids , liquids or gases _______ on heating .


a) expands

b) contracts
c) both of these

d) none of these



PLEASE DON'T TELL WRONG ANSWER​

Answer 1

Answer:

b) irreversible

d) all of these

a) expands

Explanation:

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Answer 2

Answer:

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Explanation:

1) - b

2) - d

3) - a