Question

An acidified solution of potassium chromate was layered with an equal volume of amyl alcohol. When it was shaken after the addition of 1 mL of 3% $H_2{O}_2$. a blue alcohol layer was obtained. The blue color is due to the formation of a chromium (VI) compound 'X'. What is the number of oxygen atoms bonded to chromium through only single bonds in a molecule of X?

• A. 4.00
• B. 4.0
• C. 4

Answer 1

Answer: (A), (B), (C)

$Cr{O}_4^{2-}+H_2{O}_2+H^{+}\to Cr{O}_5+H_3{O}^{+}$
$(\text{X}=Cr{O}_5)$
Number of oxygen atoms bonded to chromium through only single bonds = 4