Q. Certainly blank spaces are left in the following table and these are labelled as A, B, C, D and E. Identify each of them.​
Lab 
preparation
of
Reactants 
used
Products
formed
Drying 
agent
Method of
collection
(i) HCl gas NaCl +  H 2 S O 4 A conc.  H 2 S O 4 B
(ii)  N H 3   g a s C Mg O H 2
  N H 3
D E

 

Dear student

A is NaHSO4  + HCl
Reaction is  H2SO4 + NaCl → NaHSO4
 + HCl.
This hydrogen chloride is passed through a drying agent and is collected by upward displacement of air, which is B.

Mg3N2  + 6H2O ----> 3Mg(OH)+ NH3 
So C is 
Mg3N2  + 6H2O
and D is CaO ( Drying agent)
E: Ammonia is collected by downward displacement of air.

Regards
 

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