Question

The questions below refers to the following salt solutions listed A to F:
A: Copper nitrate
B: Iron [II] sulphate
C: Iron [III] chloride
D: Lead nitrate
E: Magnesium sulphate
F: Zinc chloride
(i) Which soln. becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it.
(ii) Which solution gives a white precipitate with excess ammonium hydroxide solution.

July 31, 2024

Answer

(i) A: Copper nitrate becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it.

(ii) D: Lead nitrate gives a white precipitate with excess ammonium hydroxide solution.

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4. Lead [II] oxide ⟶ Lead nitrate ⟶ Lead sulphate
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B: Neutralisation — alkali and dil. acid
C: Simple displacement — active metal and dil. acid
D: Direct combination
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1. PbCO3
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3. NaCl
4. Cu(NO3)2
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A: Hydracid
B: Monobasic acid
C: Less volatile acid
D: Weak acid
E: Tribasic acid
F: Dibasic acid
G: More volatile acid
1. An acid having basicity 1 and having only one replaceable hydrogen ion per molecule of the acid.
2. An acid which dissociates to give a low concentration of H+ ions.
3. An acid containing hydrogen and a non-metallic element other than oxygen.
4. The type of acid which generally displaces another acid when the acid is heated with a salt.
5. The type of acid which reacts with a base to give an acid salt and a normal salt.