(a) A person eats chocolate and then digests it.
(b) A wax candle is being burnt in air.
In the examples mentioned above, both physical and chemical changes take
place. Identify the changes and classify them. Give reasons for your answer.
Answers
My favorite memory from childhood is to learn knitting of woolen clothes from my grandmother. Explanation: My grandmother used to visit my home during my winter vacations. I remember when I was 13 year old she had brought wool rolls of atleast seven different colors from her home.Which is your favorite childhood memory that never fails to bring a smile on your lips ?
Answer:
Explanation:
A) A person eats a chocolate and then digests it, so there takes a chemical change because in the stomach digestion is held, the stomach adds special chemicals to digest it which when done is in-reversible. So, it is a chemical change because chemical changes are in-reversible.
b) When a candle burns, both physical and chemical changes occur. Physical Changes: On heating, candle wax gets melted. Since it again turns into solid wax on cooling. Chemical Changes : The wax near flame burns and gives new substances like carbon dioxide, carbon soot, water vapour, heat and light.
Hope it helps u !!