Question

When potassium dichromate crystals are heated with conc. $H_{2}S{O}_4$, we get

• A. oxygen
• B. Hydrogen
• C. Sulphur Dioxide
• D. Hydrogen sulphide

Answer 1

Answer: (A)

oxygen

$2K_{2}C{r}_2{O}_7+8H_{2}S{O}_4\to 2K_{2}S{O}_4+2C{r}_2(S{O}_4{)}_3+8H_{2}O+3O_2$