Question

What will be the formula of an oxide of iodine (atomic mass = 127) which contains 25.4 g of iodine and 8g of oxygen?

विकल्प

• \[\ce{I2O}\]

• \[\ce{I2O3}\]

• \[\ce{I2O5}\]

• \[\ce{I2O7}\]

Answer 1

\[\ce{I2O5}\]

Explanation:

∵ 25.4 g of I₂ combines with 8g of oxygen.

∴ 254 g of I₂ will combines with 80 g of oxygen.

Element	Mass %	Atomic mass	Moles of element	Molar ratio	Simplest whole number ratio
I	25.4	127	`25.4/127` = 0.2	`0.2/0.2 = 1`	2
O	8	16	`8/16 = 0.5`	`0.5/0.2 = 2.5`	5

∴ Formula of oxide of iodine will be I₂O₅.