Question

One mole of potassium chlorate is thermally decomposed and excess of aluminium is burnt in the gaseous product. How many moles or aluminium oxide are formed?
A. `1`
B. `2`
C. `1.5`
D. `3`

Answer 1

Correct Answer - A
`2KClO_(3)to2KCl+3O_(2)`
`4Al+3O_(2)to2Al_(2)O_(3)`
2 moles of `KClO_(3)` gives 2 moles of `Al_(2)O_(3)`
`:.` 1 mol of `KClO_(3)` gives 1 mol of `Al_(2)O_(3)`