When conc H2SO4 is added to an unknown salt in a testube and MNO2 is added, a greenish yellow gas X comes out. To the unknown salt solution in water, when AGNO3 is added,a white ppt is formed which is insoluble in excess of NH4OH. X displaces a brown gas from aqueous solution of KBr. Identify X and write the equations involved

Asked by lekhakarthikeyan | 28th Aug, 2018, 03:49: AM

Expert Answer:

When conc H2SOis added to an unknown salt in a test tube and MNO2 is added, a greenish yellow gas X comes out.
 
The yellow chlorine gas is chlorine, so the salt must be XCl
 
 
straight H subscript 2 SO subscript 4 space plus space MnO subscript 2 space plus space XCl space rightwards arrow with blank on top space 2 XHSO subscript 4 space plus space MnSO subscript 4 space plus space Cl subscript 2 space plus space 2 straight H subscript 2 straight O
To the unknown salt solution in water, when AgNO3 is added, a white ppt is formed which is insoluble in excess of NH4OH. 
 
 
XCl subscript open parentheses aq close parentheses end subscript space plus space AgNO subscript 3 space rightwards arrow with blank on top space AgCl space plus space XNO subscript 3
X displaces a brown gas from the aqueous solution of KBr. 

 
KBr space plus space Cl subscript 2 space rightwards arrow with blank on top space KCl space plus space Br subscript 2
 
X is Chlorine gas.

Answered by Varsha | 28th Aug, 2018, 04:04: PM