14. What is observed when hot concentrated caustic soda
solution is added to (a) Zinc and (b) Aluminium ? Write
balanced equations.
15. (a) What do you understand by amphoteric oxide ?
(b) Give the balanced equations for the reaction with
two different amphoteric oxides with a caustic alkali.
(c) Name the products formed.
16. Write balanced equations for the following conversions
(a) ZnSO, A > Zn(OH), _By Na ZnO,
(b) Cuso, 4 → Cu(OH), B> [Cu(NH,),JSO.
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here is your answer of 14 ⬆️⬆️⬆️
15:- (a) Amphoteric means that a substance can act as both acids and bases. Amphoteric oxides are oxides that are in amphoteric in nature. Many metals (such as copper, zinc, tin, lead, aluminium, and beryllium) form amphoteric oxides or hydroxides.
(b) ZnO + 2NaOH → Na2ZnO2 + H2O
Al2O3 + 2NaOH → 2NaAlO2 + H2O
(c) Sodium zincate
Aluminium zincate
16:-. I don't know sorry for this
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