Observe the following changes and decode weather they are physical or�

1.	Observe the following changes and decode weather they are physical or chemical changes? Mention the reason, a) Preparation of tea b) Making dough for roti.
Answer» a) This is a chemical change. Water + Milk + Tea powder + Sugar → Tea Here tea is a new substance. Hence it is a chemical change, b) Making dough for roti is a physical change as there is no formation of new substance.

Observe the following changes and decode weather they are physical or chemical changes? Mention the reason, a) Preparation of tea b) Making dough for roti.

Answer»

a) This is a chemical change. Water + Milk + Tea powder + Sugar → Tea Here tea is a new substance. Hence it is a chemical change,

b) Making dough for roti is a physical change as there is no formation of new substance.