Question

mention the nature and color of the following salts- zinc carbonate, copper sulphate pentahydrate, lead nitrate, ammonium dichromate.

Answer 1

1) Physical Description. ZINC CARBONATE is a white crystalline solid or powder that is insoluble in water. The primary hazard is the threat posed to the environment.

2) When water is then added to the anhydrous compound, it turns back into the pentahydrate form, regaining its blue color, and is known as blue vitriol. Copper(II) sulfate pentahydrate can easily be produced by crystallization from solution as copper(II) sulfate is quite hygroscopic.

3) Lead(II) nitrate is an inorganic compound with the chemical formula Pb(NO3)2. It commonly occurs as a colourless crystal or white powder and, unlike most other lead(II) salts, is soluble in water.

4) This demo decomposes ammonium dichromate using a fuse soaked in ethanol. The reaction is a violent one, that resembles a volcano. Ammonium dichromate is an orange solid, while chromium (III) oxide is a dark green solid.

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Answer 2

Zinc carbonate :-
nature = basic.
colour = white.
Copper sulphate pentahydrate :-
nature = acidic.
colour = blue.
Lead nitrate :-
nature = acidic.
colour = colourless/ white.
Ammonium dichromate :-
nature = sorry but I don't know it's nature.
colour = orange red

Hope it helps you.