An element X reacts with hydrogen, when heated, to form a covalent hydride H₂X. If H₂X has a smell of rotten eggs, the element X is likely to be:
(a) carbon
(b) sulphur
(c) chlorine
(d) phosphorus

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Solution

(b) sulphur
Because sulphur reacts with hydrogen to form a covalent hydride, H₂S that has the smell of rotten eggs.

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An element X reacts with hydrogen, when heated, to form a covalent hydride H2X. If H2X has a smell of rotten eggs, the element X is likely to be: (a) carbon (b) sulphur (c) chlorine (d) phosphorus

(b) sulphur Because sulphur reacts with hydrogen to form a covalent hydride, H2S that has the smell of rotten eggs.

An element X reacts with hydrogen, when heated, to form a covalent hydride H₂X. If H₂X has a smell of rotten eggs, the element X is likely to be:
(a) carbon
(b) sulphur
(c) chlorine
(d) phosphorus

(b) sulphur
Because sulphur reacts with hydrogen to form a covalent hydride, H₂S that has the smell of rotten eggs.