2 Cr OH 3-3 Na 2 O 2- A -2 NaOH -2 H 2 O A is-A- NaCrO 2B- Na 2 Cr O 2C- N a2 C r O4D- Na 2 CrO 3

The correct option is C [Na_2O_2 + H_2O → 2 NaOH + O] × 3 2Cr(OH)_3 + 4 NaOH + 3O → 2Na_2CrO_4 + 5H_2O By adding the above two equations we get 2C ...

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Byju's Answer

Standard XII

Chemistry

Sulphuric Acid

2 Cr OH 3+3 N...

Question

$2 C r (O H)_{3} + 3 N a_{2} O_{2} \to A - - + 2 N a O H + 2 H_{2} O A$ is.

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Solution

The correct option is C

$[N a_{2} O_{2} + H_{2} O \to 2 N a O H + O] \times 3$

$2 C r (O H)_{3} + 4 N a O H + 3 O \to 2 N a_{2} C r O_{4} + 5 H_{2} O$

By adding the above two equations we get

$2 C r (O H)_{3} + 3 N a_{2} O_{2} \to 2 N a_{2} C r O_{4} + 2 N a O H + 2 H_{2} O$

$N a_{2} O_{2}$ acts as a powerful oxidizing agent.

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Similar questions

2 N a O H + H_{2} S O_{4} ⟶ N a_{2} S O_{4} + 2 H_{2} O

It is

Q. Identify the compound

A

in the reaction given below.

N a_{2} B_{4} O_{7} + 2 H_{2} O \to 2 N a O H + A

What is the mechanism of following reactions in the preparation of hydrogen:

Zn+2NaOH=Na₂ZnO₂ +H₂

2Al+2NaOH+2H₂O=2NaAlO₂ +3H₂

Sn+2NaOH+H₂O=Na₂ZnO₃+ 2H₂

Q. When Na₂O₂ and Water react,
why does 2Na₂O₂+ 2H₂O = 4NaOH + O₂? Shouldn't it be Na₂O₂+ 2H₂O = 2NaOH + H₂O₂

N a O H

can be prepared by two methods each with two steps having

100 %

extent.

I

2 N a + 2 H_{2} O ⟶ 2 N a O H + H_{2}

2 H_{2} + O_{2} ⟶ 2 H_{2} O

I I

2 N a + \frac{1}{2} O_{2} ⟶ N a_{2} O

N a_{2} O + H_{2} O ⟶ 2 N a O H

Which gives better yield?

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2Cr(OH)3 + 3Na2O2 → A–– + 2NaOH + 2H2O A is.

The correct option is C [Na2O2 + H2O → 2 NaOH + O] × 3 2Cr(OH)3 + 4 NaOH + 3O → 2Na2CrO4 + 5H2O By adding the above two equations we get 2Cr(OH)3 + 3Na2O2 → 2Na2CrO4 + 2NaOH + 2H2O Na2O2 acts as a powerful oxidizing agent.

$2 C r (O H)_{3} + 3 N a_{2} O_{2} \to A - - + 2 N a O H + 2 H_{2} O A$ is.