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METALS AND NON METALS CLASS 8TH
QNO1.Can you store lemon pickle in an aluminium utensil?Explain.

Ans.No,we can't store lemon pickle in aluminium utensil because aluminium will react with lemon pickle which ia acidic in nature which will produce hydrogen gas

Metal+ACID-------------->SALT +HYDROGEN

WHAT HAPPENS WHEN:

a)Dilute H2SO4(Sulphuric acid)is poured on a copper plate ?

ANS.when dilute H2SO4 acid is poured on copper plate.it reacts with copper and results in the formation of copper sulpur and hydrogen gas 

H2SO4+CU----------->CUSO4+H2

B)Iron nails are placed in copper sulphate solution?

ANS.When iron nails are placed in copper sulphate solution then iron displaces copper and form iron sulphate.

CUSO4+FE----------->FESO4+CU