Question

A student stated that metals react with base a) support this satement with a balanced chemical equation b) what are such metals called c) write the balanced chemical equation for the reaction of the same metal with dil H2So4 d) how will you test the gas evolved during the both reactions

Answer 1

(a)Zn+ NaOH=Na2ZnO2+H2
Al+NaOH=NaAlO2+H2
(b)such metal are amphoteric in nature
(c)Zn+H2SO4=ZnSO4+H2
Al+H2SO4=Al2(SO4)3+H2
(d)the gas burns with a pop sound

Answer 2

a)Zn +2 NaoH----->Na2zno2 + H2

zinc react with base caustic soda to form sodium zincate.

b) amphoteric compound (having basic as well as acidic property)

c)Zn +H2SO4------> znso4+ H2

D) it can be tasted by pop sound taking near the candle or matchstick