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Colour and Solubility

Which two sol...

Question

Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution?

A

Copper nitrate and Lead nitrate

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B

Iron(II) sulphate and Magnesium sulphate

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C

Iron(III) chloride and Zinc chloride

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D

Lead nitrate and Zinc chloride

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E

Iron(II) sulphate and Iron(III) chloride

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Solution

The correct option is B
Iron(II) sulphate and Magnesium sulphate

Iron(II) sulphate and Magnesium sulphate

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Q. The questions (i) to (v) refer 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 two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution?
(ii) Which two solution will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution?
(iii) Which solution will give a white precipitate when either dilute hydrochloric acid or dilute sulphuric acid is added to it?
(iv) Which solution becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it?
(v) Which solution gives a white precipitate with excess ammonium hydroxide solution?

Q. Write the formula of the following compounds.
calcium hydroxide, copper chloride, iron sulphate, sodium carbonate, copper nitrate, copper oxide, lead sulphide, magnesium chloride, zinc sulphate, potassium hydroxide.

Q. Write a balanced chemical equation with the help of chemical symbols and formulas for the following reactions:

(i) Zinc + Silver nitrate

⟶

Zinc nitrate + Silver

(ii) Copper oxide + Hydrogen

⟶

(iii) Barium chloride + Aluminium sulphate

⟶

Barium sulphate + Aluminium chloride

Write the balanced chemical equations for the following reactions.

(a) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water

(b) Zinc + Silver nitrate → Zinc nitrate + Silver

(c) Aluminium + Copper chloride → Aluminium chloride + Copper

(d) Barium chloride + Potassium sulphate → Barium sulphate +

Potassium chloride

Q. Sodium hydroxide solution is added first in a small quantity, then in excess to the aqueous salt solutions of copper (II) sulphate, zinc nitrate, lead nitrate, calcium chloride and iron (III) sulphate. Copy the following table and write the colour of the precipitate in (i) to (v) and the nature of the precipitate (soluble or insoluble) in (vi) to (x).

Aqueous salt solution	Colour of precipitate when NaOH is added in a small quantity.	Nature of precipitate (soluble or insoluble) when NaOH is added in excess.
Copper(II) sulphate Zinc nitrate Lead nitrate Calcium chloride Iron(III) sulphate	(i) (ii) (iii) (iv) (v)	(vi) (vii) (viii) (ix) (x)

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