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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
s Block Elements

NTA Abhyas 2020 · Chemistry · s Block Elements

A metal on combustion in excess air forms X. X upon hydrolysis with...

A metal on combustion in excess air forms X. X upon hydrolysis with water yields H2O2{H}_{2}{O}_{2} and O2{O}_{2} along with another product the metal is

Options

  1. ALi
  2. BNa
  3. CRb
  4. DMg

Correct answer

C. Rb

Step-by-step solution

It is Rb and the reactions are as follows
Rb+O2→RbO2′X′Rb + {O}_{2} \to \mathop{Rb{O}_{2}}_{'X'}
2RbO2+2H2O→2RbOH+H2O2+O22Rb{O}_{2} + 2{H}_{2}O \to 2RbOH + {H}_{2}{O}_{2} + {O}_{2}
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