A metal exhibits the valencies 1 and 3 . When higher metal halide is strongly heated, it decomposed into lower halide and halogen gas. When 29.6 gm of higher metal halide is decomposed completely, 15.

Question

A metal exhibits the valencies 1 and 3 . When higher metal halide is strongly heated, it decomposed into lower halide and halogen gas. When 29.6 gm of higher metal halide is decomposed completely, 15.4 gm of lower halide is produced along with 4.48 L of halogen gas X 2 ​ (measured at 0 ∘ C and 1 atm ). Which of the following statement is incorrect on the bases of these information?

TestHub · Accepted Answer

MX 3 ​ → MX + X 2 ​ 29.6 15.4 gm 22.4 4.48 ​ moles = 0.2 moles ⇒ n MX 3 ​ ​ = 0.2 = n MX ​ ⇒ m + 3 x 29.6 ​ = 0.2 m + 3 x = 148 .....(1) Also m + x 15.4 ​ = 0.2 m + x = 77 ....(2) Solving (1) and (2) x = 35.5 8 m = 41.5 ∴ x is chlorine

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