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Standard IX

Chemistry

Homogeneous Mixture

The cartridge...

Question

The cartridge in a dry cell contains :

manganese dioxide and ammonium chloride

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manganese dioxide and zinc dust

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ammonium chloride and zinc dust

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manganese dioxide and activated carbon

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Solution

The correct option is D manganese dioxide and activated carbon
The cartridge in a dry cell contains manganese dioxide and activated carbon .

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Similar questions

Q. In a zinc manganese dioxide dry cell, the anode is made up of zinc and cathode of a carbon rod surrounded by a mixture of

M n O_{2}, c a r b o n, N H_{4} C l

and

Z n C l_{2}

in aqueous base.
The cathodic reaction may be represented as:

2 M n O_{2} (s) + Z n^{2 +} + 2 e^{-} \to Z n M n_{2} O_{4} (s)

Let there be

8 g M n O_{2}

in the cathodic compartment. How many days will the dry cell continue to give a current of

4 \times 10^{- 3}

ampere?

Q. Translate the following statements into chemical equations and then balance the equations:
(a) Hydrogen sulphide gas burns in air to give water and sulphur dioxide.
(b) Phosphorus burns in oxygen to give phosphorus pentoxide.
(c) Carbon disulphide burns in air to give carbon dioxide and sulphur dioxide.
(d) Aluminium metal replaces iron from ferric oxide, Fe₂O₃, giving aluminium oxide and iron.
(e) Barium chloride reacts with zinc sulphate to give zinc chloride and barium sulphate.

Q. Zinc carbonate

\to

Zinc oxide + carbon dioxide.

Identify the type of reaction.

Write the balanced chemical equations for the following reactions.

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

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

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

Potassium chloride

Write the balanced chemical equations of the following reactions.

(a) Sodium hydroxide + sulphuric acid $\to$ sodium sulphate + water

(b) Potassium bicarbonate + sulphuric acid $\to$ potassium sulphate + carbon dioxide + water

(d) Chlorine + sulphur dioxide + water $\to$ sulphuric acid + hydrogen chloride

(e) Silver nitrate $\to$ silver + nitrogen dioxide + oxygen

(f) Copper + nitric acid $\to$ copper nitrate + nitric oxide + water

(g) Ammonia + oxygen $\to$ nitric oxide + water

(h) Barium chloride + sulphuric acid $\to$ barium sulphate + hydrochloric acid

(i) Zinc sulphide + oxygen $\to$ zinc oxide + sulphur dioxide

(j) Aluminium carbide + water $\to$ aluminium hydroxide + methane

(k) Iron pyrites ( $F e S_{2}$ ) + oxygen $\to$ ferric oxide + sulphur dioxide

(l) Potassium permanganate + hydrochloric acid $\to$ potassium chloride + manganese chloride + chlorine + water

(m) Aluminium sulphate + sodium hydroxide $\to$ sodium sulphate + sodium meta aluminate + water.

(n) Aluminium + sodium hydroxide + water $\to$ sodium meta aluminate + hydrogen

(o) Potassium dichromate + sulphuric acid $\to$ potassium chloride + chromium chloride + water + chlorine.

(p) Sulphur + nitric acid $\to$ sulphuric acid + nitrogen dioxide + water.

(q) Sodium chloride + manganese dioxide + sulphuric acid $\to$ sodium hydrogen sulphate + manganese sulphate + water + chlorine.

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The cartridge in a dry cell contains :

The correct option is D manganese dioxide and activated carbonThe cartridge in a dry cell contains manganese dioxide and activated carbon .

The correct option is D manganese dioxide and activated carbon
The cartridge in a dry cell contains manganese dioxide and activated carbon .