Exercise

Which of the following is a mixture?

air, water, sugar, salt, alum.

Manu went to watch film with his parents. In the dark, he found a small beam of light within which million of tiny particles were dancing. He thought, when there was light, no such beam appears. He was very surprised. He asked about this from his science teacher. His science teacher told him that was due to scattering of light.

Answer the following questions based on the given passage:

What were the tiny particles?

Manu went to watch film with his parents. In the dark, he found a small beam of light within which million of tiny particles were dancing. He thought, when there was light, no such beam appears. He was very surprised. He asked about this from his science teacher. His science teacher told him that was due to scattering of light.

Answer the following questions based on the given passage:

Why these were not appeared in the presence of light?

Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.

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 near the bottom 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. Which component will be collected at the top 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.

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?