Dr. Pankaj Rai Solutions for Chapter: Is Matter Around Us Pure, Exercise 1: Exercise

Which of the following is a mixture?

air, water, sugar, salt, alum.

The liquid air has three components $\mathrm{X}$, $\mathrm{Y}$ and $\mathrm{Z}$ whose boiling points are $–186 °\mathrm{C}, –183 °\mathrm{C}, –196 °\mathrm{C}$ respectively. When liquid air is fed into a tall fractional distillation column near its bottom and warmed up slowly.

Which component will be collected at the middle part of the fractional distillation column? Why?

The liquid air has three components $\mathrm{X}$, $\mathrm{Y}$ and $\mathrm{Z}$ whose boiling points are $–186 °\mathrm{C}, –183 °\mathrm{C}, –196 °\mathrm{C}$ respectively. When liquid air is fed into a tall fractional distillation column near its bottom and warmed up slowly.

What could the component $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ be?

Tincture of iodine is a mixture of two materials $\mathrm{X}$ and $\mathrm{Y}$. The material $\mathrm{Y}$ has a property that its solid form can be converted directly into vapours on heating by a process called $\mathrm{Z}$.

What could $\mathrm{X}$ be?

Tincture of iodine is a mixture of two materials $\mathrm{X}$ and $\mathrm{Y}$. The material $\mathrm{Y}$ has a property that its solid form can be converted directly into vapours on heating by a process called $\mathrm{Z}$.

What could $\mathrm{Y}$ be?

Tincture of iodine is a mixture of two materials $\mathrm{X}$ and $\mathrm{Y}$. The material $\mathrm{Y}$ has a property that its solid form can be converted directly into vapours on heating by a process called $\mathrm{Z}$.

Name the process $\mathrm{Z}$.

Tincture of iodine is a mixture of two materials $\mathrm{X}$ and $\mathrm{Y}$. The material $\mathrm{Y}$ has a property that its solid form can be converted directly into vapours on heating by a process called $\mathrm{Z}$.

Which process would you use to recover both the components $\mathrm{X}$ and $\mathrm{Y}$ from tincture of iodine ?

Tincture of iodine is a mixture of two materials $\mathrm{X}$ and $\mathrm{Y}$. The material $\mathrm{Y}$ has a property that its solid form can be converted directly into vapours on heating by a process called $\mathrm{Z}$.

Which process can be used to recover only component $\mathrm{Y}$ from tincture of iodine ?