Question

The burning of LPG, candles, etc is a physical change or chemical change.​

Answer 1

Answer:

When a candle burns, first it melts which is a physical change. When the liquid is converted into vapours and mixed with air during burning, a chemical change takes place. Another example of a change in which both physical and chemical changes occur is burning of LPG gas.

Answer 2

Answer:

NCERT Solutions Class 7 Science Physical and Chemical Changes When a candle burns, first it melts which is a physical change. When the liquid is converted into vapours and mixed with air during burning, a chemical change takes place. Another example of a change in which both physical and chemical changes occur is burning of LPG gas.