Qualitative Analysis - Result Question 58

####61. A soluble compound of a poisonous element M, when heated with Zn/H2SO4 gives a colourless and extremely poisonous gaseous compound N, which on passing through a heated tube gives a silvery mirror of element M. Identify M and N.

(1997)

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Solution:

  1. The poisonous element M may be As. On the basis of given information :

AsCl3+6HZnH2SO4AsH3N+3HCl 2AsH3Δ2AsM+3H2



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