Question

One mole of potassium chlorate is thermally decomposed and excess of aluminium is burnt in the gaseous product. How many moles of aluminium oxide are formed ?

• A. 1
• B. 2
• C. 1.5
• D. 3

Answer 1

Answer: (A)

1

Answer 2

$2 KClO_{3}\to 2KCl+3O_{2}$ $4Al+3O_{2}\to 2Al_{2}O_{3}$ $2$ moles of $KClO_{3}$ gives $2$ moles of $Al_{2}O_{3}$ $\therefore$ $1$ mol of $KCIO_{3}$ gives 1 mol of $Al_{2}O_{3}$