Which of the following is a chemical change?

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

Burning of candle

Digestion of food

Cooking of food

All of the above

answer is D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

All the above are examples of a chemical change. A physical change is a change in which a new substance is not formed. Physical changes are generally reversible, but sometimes irreversible. A chemical change is a change in which a new substance is created by a chemical reaction. Burning candles, digesting food, and cooking food are chemical changes. It is a chemical change that burns candles. After burning, wax is produced and

{CO}_{2}

is released, so the wax cannot be returned to the candle. Food digestion is a chemical change. This is because during digestion, new substances that cannot be converted to food , are formed. Similarly, cooking of food is chemical change because cooked ingredients cannot be converted back to their original ingredients.

Watch 3-min video & get full concept clarity