Question

write two uses of washing soda , bleaching powder , baking soda

Answer 1

washing soda:*can be used to remove stubborn stains from laundry 
*softening hard water
bleaching powder:*used in kitchens to disinfectant surfaces and equipment.
used to sanitize public swimming pools
baking soda:*used as an antacid
*Make a simple paste of water and baking soda and apply as a salve onto affected skin.

Answer 2

Baking powder is a mixture of baking soda and a mild acid known as tartaric acid. When it is heated or mixed in water, it releases CO2 that makes bread or cake fluffy.