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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
Answer» C. copper sulphate on iron nails


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