question_answer

DIRECTIONS: Read the passage given below and answer the questions that/allow. Passage - 1 Take a small quantity of copper sulphate crystals and dissolve it in a small quantity of water to obtain blue coloured solution. Add a few drops of dilute sulphuric acid. Now, put 3-5 medium sized iron nails in it. Soon the colour of blue solution changes to green and a brown deposit appears on the iron nails. Brown deposits that appears on iron nails Is due to deposition of:

A) iron on iron nails        

B) copper on iron nails

C) copper sulphate on iron nails

D) iron sulphate on iron nails