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Ionic Compounds: Chemical Formula

The chemical ...

Question

The chemical formula of sodium sulphide contains:

two sulphur and one sodium atoms

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one sulphur and one sodium atoms

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one sulphur and two sodium atoms

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two sulphur and two sodium atoms

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Solution

The correct option is D one sulphur and two sodium atoms
The chemical formula for sodium sulphide contains one sulphur and two sodium atoms.
Sodium forms Na $^{+}$ cation and sulphur forms $S^{2 -}$ anion. The compound formed is $N a_{2} S$ . Hence option C is correct.

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Similar questions

Define a chemical formula. What is the chemical formula of sulphuric acid and Sodium hydroxide?

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.

Soda acid fire extinguishers contains :a) sodium carbonate

B) sodium hydrogen carbonate ,sulphuric acid

C) sodium carbonate, hydrochloric acid

D )sodium hydrogen carbonate, hydrochloric acid

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