What happens when `1^@`, `2^@` and `3^@` alcohols are passed over red hot copper ? Give equations.

How will you distinguish secondary and tertiary alcohols are passed over red hot copper ? Give equations .

What happens when H_3PO_3 is heated?

What happens when: Iron nails are placed in a copper sulphate solution ? Write word equation of the reaction involved.

What happens when CO_2 is passed through lime water?