Question

5.Which type of change takes place in the following and state whether the energy is evolved or

absorbed during the change?

Burning of a candle, lightening of a bulb, preparation of food by green plants, volcanic eruption,

evaporation of petrol, burning of LPG.​

Answer 1

Answer:

Burning of a candle Chemical change as well as physical change and energy evolved. Lightning of a bulb Physical change, energy evolved.10-Jun-2019

Physical change is easily reversible: Chemical change is irreversible

Physical change: Chemical change

No new substance is formed: New substance is formed

It is a temporary change: It is a permanent change

Answer 2

Answer:

Answer: Burning of a candle Chemical change as well as physical change and energy evolved. Lightning of a bulb Physical change, energy evolved.10-Jun-2019

Physical change is easily reversible: Chemical change is irreversible

Physical change: Chemical change

It is a temporary change: It is a permanent change

No new substance is formed: New substance is formed