A Na2O2-H2SO4- Na2SO4-H2O21 Redox reactionB H2-Cl2- 2HCl2 Oxidation reactionC CrOH3- CrO4-23 Non - redox reactionD IO3- I-4 Reduction reaction

The correct option is B A 3, B 1, C 2, D 4A) Na_2O_2+H_2SO_4→ Na_2SO_4+H_2O_2 In the reaction of sodium peroxide with sulphuric acid, the oxidatio ...

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Byju's Answer

Standard XII

Chemistry

Introduction

A Na2O2+H2S...

Question

A) $N a_{2} O_{2} + H_{2} S O_{4} \to N a_{2} S O_{4} + H_{2} O_{2}$
1) Redox reaction
B) $H_{2} + C l_{2} \to 2 H C l$
2) Oxidation reaction
C) $C r (O H)_{3} \to C r O_{4}^{- 2}$
3) Non - redox reaction
D) $I O_{3}^{-} \to I^{-}$
4) Reduction reaction

A - 3, B - 1, C - 2, D - 4

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A - 3, B - 2, C - 1, D - 4

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A - 1, B - 3, C - 2, D - 4

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A - 1, B - 3, C - 4, D - 2

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Solution

The correct option is B A - 3, B - 1, C - 2, D - 4
A) $N a_{2} O_{2} + H_{2} S O_{4} \to N a_{2} S O_{4} + H_{2} O_{2}$
In the reaction of sodium peroxide with sulphuric acid, the oxidation numbers of all the species remains same. Hence, it is non-redox reaction.
B) $H_{2} + C l_{2} \to 2 H C l$
In the reaction of hydrogen with chlorine to form hydrogen chloride, hydrogen is oxidized and chlorine is reduced. Thus, it is a redox reaction.
C) $C r (O H)_{3} \to C r O_{4}^{- 2}$
During conversion of chromium trihydroxide to chromate ion, the oxidation number of chromium changes from +3 to +6. Hence, chromium is oxidized.
D) $I O_{3}^{-} \to I^{-}$
During conversion of $I O_{3}^{-}$ to $I^{-}$ , the oxidation number of iodine changes from +5 to -1. Thus, iodine is reduced in this reaction.

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A) $N a_{2} O_{2} + H_{2} S O_{4} \to N a_{2} S O_{4} + H_{2} O_{2}$	1) Redox reaction
B) $H_{2} + C l_{2} \to 2 H C l$	2) Oxidation reaction
C) $C r (O H)_{3} \to C r O_{4}^{- 2}$	3) Non - redox reaction
D) $I O_{3}^{-} \to I^{-}$	4) Reduction reaction

A) Na2O2+H2SO4→Na2SO4+H2O21) Redox reactionB) H2+Cl2→2HCl2) Oxidation reactionC) Cr(OH)3→CrO−243) Non - redox reactionD) IO−3→I−4) Reduction reaction

A) $N a_{2} O_{2} + H_{2} S O_{4} \to N a_{2} S O_{4} + H_{2} O_{2}$
1) Redox reaction
B) $H_{2} + C l_{2} \to 2 H C l$
2) Oxidation reaction
C) $C r (O H)_{3} \to C r O_{4}^{- 2}$
3) Non - redox reaction
D) $I O_{3}^{-} \to I^{-}$
4) Reduction reaction