When a solid element is reacted with chlorine, a gaseous chloride of vapour density 85 is formed. If this reaction is performed at constant temperature and pressure, the volume of the system reduces b

Question

When a solid element is reacted with chlorine, a gaseous chloride of vapour density 85 is formed. If this reaction is performed at constant temperature and pressure, the volume of the system reduces by one half. If the equivalent weight of the solid element is E, then the value of (8/7× E) is

TestHub · Accepted Answer

Molar mass of chloride = 2 × 85 = 170. Per mole of MC l x ​ , x/2 mol C l 2 ​ give 1 mol chloride; volume halves: 1 = 1/2·x/2 ⇒ x = 4. M = 170 - 4(35.5) = 28, so E = 28/4 = 7 and 8/7× 7 = 8. Ans: 8.

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