Chemistry
Name:
(a) two coloured metal ions.
(b) a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
(c) two bases which are not alkalis but dissolve in strong alkalis.
(d) a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
(e) a colourless cation not a representative element.
(f) a yellow monoxide that dissolves in hot and concentrated caustic alkali.
(g) a white, insoluble oxide that dissolves when fused with caustic soda or caustic potash.
(h) a compound containing zinc in the anion.
Analytical Chemistry
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Answer
(a) Cupric ion [Cu2+], Ferrous ion [Fe2+]
(b) Aluminium [Al]
(c) Zinc hydroxide [Zn(OH)2] and Lead hydroxide [Pb(OH)2]
(d) Lead oxide [PbO]
(e) Ammonium ion [NH4+]
(f) Lead oxide [PbO]
(g) Zinc oxide [ZnO]
(h) Potassium Zincate [K2ZnO2]
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