Page 1 - 4-Home Assignment-Reversible and irreversible Changes

SAI INTERNATIONAL SCHOOL
Class - VI
Subject - Chemistry
Topic – Changes Around Us
Sub-Topic – Reversible and Irreversible Changes

Home Assignment

Objective Questions/MCQs:-

1. Which one of these is not a reversible change?
a) Boiling of water.
b) Boiling of an egg.

c) Boiling of alcohol.
d) Melting of wax.

2. Which of the following changes are irreversible?
i. Lifting of a chair.
ii. Filling a glass with orange juice.
iii. Cooking a pot of rice.
iv. Bursting a balloon.

(a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iv) (d) (iii) and (iv)

3. Any change in which the original substance can be obtained by reversing conditions is
known as a:
(a) Reversible change (b) Periodic change
(c) Physical change (d) both (a) and (c)

4. The melting of wax is an example of:
a) Physical change
b) Irreversible change
c) Chemical change
d) Natural change

5. The burning of candle wick is an example of:
a) Fast change
b) Chemical change
c) Reversible change
d) Physical change

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