Question
Chemistry Question on Dual nature of radiation and matter
Which one of the following observations is not true when a mixture of KCl, K2Cr2O7 and conc. H2SO4 is warmed carefully?
A
(A) A deep red vapour is evolved.
B
(B) When the vapour is passed into KOH solution, a yellow solution is obtained.
C
(C) When the yellow solution is acidified with acetic acid and lead acetate solution is added to it, a yellow precipitate is formed.
D
(D) The red vapour is a mixture of chromyl chloride and chlorine.
Answer
(D) The red vapour is a mixture of chromyl chloride and chlorine.
Explanation
Solution
Explanation:
The red vapour is only chromyl chloride and no chlorine is mixed with it.Thus, (4) is false.