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JEE Advanced 2020Paper 1
Exam
JEE Advanced
Year
2020
Paper
Paper 1
Subject
Chemistry
Chapter
s Block Elements

JEE Advanced 2020 · Paper 1 · Chemistry · s Block Elements

Which of the following liberates O _ 2 upon hydrolysis?

Which of the following liberates O2{O}_{2} upon hydrolysis?

Options

  1. APb3O4{Pb}_{3}{O}_{4}
  2. BKO2{KO}_{2}
  3. CNa2O2{Na}_{2}{O}_{2}
  4. DLi2O2{Li}_{2}{O}_{2}

Correct answer

B. KO2{KO}_{2}

Step-by-step solution

(A)Pb3O4+H2O→\left(A\right) {Pb}_{3}{O}_{4} + {H}_{2}O \toNo reaction

(B)2KO2+2H2O→2KOH+H2O2+O2( B ) 2{KO}_{2} + 2{H}_{2}O \to 2KOH + {H}_{2}{O}_{2} + {O}_{2}

(C)Na2O2+2H2O→2NaOH+H2O2( C ) {Na}_{2}{O}_{2} + 2{H}_{2}O \to 2NaOH + {H}_{2}{O}_{2}

(D)Li2O2+2H2O→2LOH+H2O2( D ) {Li}_{2}{O}_{2} + 2{H}_{2}O \to 2LOH + {H}_{2}{O}_{2}

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