0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

An inorganic salt is lemon yellow in colour. It becomes orange in colour like methyl orange when it is acidic and again becomes yellow when it is alkaline. The inorganic salt will be :
  1. copper nitrate
  2. ferric chloride
  3. potassium chromate
  4. potassium ferricyanide

A
potassium chromate
B
copper nitrate
C
ferric chloride
D
potassium ferricyanide
Solution
Verified by Toppr

2CrO42-(aq) (yellow) + 2H+(aq) Cr2O72-(aq) (orange) + H2O(l)
The addition of acid encourages the equilibrium towards the right, producing more orange-coloured dichromate(VI) ions. The addition of hydroxide ions causes the concentration of hydrogen ions to decrease, and this brings the equilibrium back to the left-hand side, regenerating yellow chromate(VI) ions.

Was this answer helpful?
0
Similar Questions
Q1
An inorganic salt is lemon yellow in colour. It becomes orange in colour like methyl orange when it is acidic and again becomes yellow when it is alkaline. The inorganic salt will be :
View Solution
Q2
Which substance changes its colour from orange to yellow in alkaline solution?
View Solution
Q3
Resistor is coloured as green - orange - yellow - gold,its resistance will be:
View Solution
Q4
Certain inorganic salt, when introduced in flame, produces crimson red colour. It indicates the presence of:
View Solution
Q5
Certain inorganic salt, when introduced in flame produces crimson red colour. It indicates the presence of
View Solution