Question

MULTIPLE CHOICE TYPE QUESTIONS : Tick (V) the correct answer
1. Which of the following is not a physical change ?
(a) melting of wax
(b) tearing a piece of paper
(c) dissolution of salt in water
(d) digestion of food●

2. Which of the following is a chemical change?
(a) breaking of a brick (b) evaporation of a líquid (c) burning of a candle (d) moving of a wheel●

3. Chemical changes are
(a) always irreversible (b) always reversible (c) mostly irreversible (d) mostly reversible●

4. During the dissolution of urea, heat
(a) is absorbed
(b) is evolved
(c) does not change (d) none of these●

(HINT: When urea is dissolved in water cooling is observed)​

Answer 1

Answer:

1.d.digestion of food

2.b.evaporation of a liquid

3.c.mostly irreversible

4.is evolved

Answer 2

2. Which of the following is a chemical change?

(a) breaking of a brick (b) evaporation of a líquid (c) burning of a candle (d) moving of a wheel

Answer = (c) burning of a candle

3. Chemical changes are

(a) always irreversible (b) always reversible (c) mostly irreversible (d) mostly reversible

Answer = (a) always irreversible

4. During the dissolution of urea, heat

(a) is absorbed

(b) is evolved

(c) does not change (d) none of these

Answer = (a) is absorbed

The first answer of yours is correct mate = (d) digestion of food,