Question

What happen when K2Cr2O7 reacts with (a)potassium nitrite
(b) Hydrogen Sulphide​

Answer 1

Answer:

this is easy.....

(b) Hydrogen Sulphide.

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Answer 2

When potassium dichromate reacts with them it forms :

a)With Potassium nitrite - Chromium sulphate , potassium sulphate ,potassium nitrate .

b)With Hydrogen sulphide -It forms chromium hydroxide ,potassium hydrosulphide and sulphur .

Explanation:

Potassium dichromate  

• Its molecular formula is K₂Cr₂O₇
• It is orange in colour .
• It is an powerful oxidising agent - it can oxidise alcohols , can convert primary alcohol to aldehyde ,and also alcohol directly to carboxylic acid  
• It is highly corrosive in nature .