KCET2016Chemistryd and f Block Elements
When a brown compound of ( M n(A) ) is treated with ( H C l ), it gives a gas (B). The gas (B) taken in excess reacts with ( NH ₃ ) to give an explosive compound (C). The compounds A, B and C are;
Options
- A( A = MnO ₂, ~B = Cl ₂, C = NCl ₃ )
- B( A=M n O, B=C l₂, C=N H₄ C l )
- C( A = Mn ₃ O ₄, ~B = Cl ₂, C = NCl ₃ )
- D( A = MnO ₃, ~B = Cl ₂, C = NCl ₂ )
Correct answer
A. ( A = MnO ₂, ~B = Cl ₂, C = NCl ₃ )
Step-by-step solution
When a brown compound of ( M n(A) ) is treated with ( H C l ), it gives a gas (B) as shown below. ( MnO ₂( ~A )+4 HCl MnCl ₂+2 H ₂ O + Cl ₂( ~B ) ) The gas (B) taken in excess reacts with ( NH ₃ ) to give an explosive compound (C) as shown below. ( 3 Cl ₂(B)+ NH ₃ NCl ₃(C)+3 HCl ) Therefore, the compounds ( A, B ) and ( C ) are ( MnO ₂, Cl ₂ ), and ( NCl ₃ ).