English Medium इयत्ता ९ - CBSE Question Bank Solutions

The material which is added to water during purification process at the water works so as to disinfect it is :

The technique which is used to separate particles of a solid suspended in a liquid quickly is called :

The technique which is used to separate particles of a solid suspended in a liquid quickly is called :

Naphthalene can be separated from sand :

Naphthalene can be separated from sand :

Which of the following cannot be separated from air by the process of fractional distillation ?

Which of the following cannot be separated from air by the process of fractional distillation ?

The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :

The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :

The boiling point of liquid argon is :

The boiling point of liquid argon is :

You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture ?

You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture ?

The best way to recover sugar from an aqueous sugar solution is :

The best way to recover sugar from an aqueous sugar solution is :

One of the following does not undergo sublimation. This one is :

One of the following does not undergo sublimation. This one is :

Which one of the following scrap metal cannot be separated by magnetic separation ?

Which one of the following scrap metal cannot be separated by magnetic separation ?

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

(a) Which component will be collected from near the bottom of the fraction distillation column ? Why ?

(b) Which component will be collected from the top part of the fractional distillation column ? Why ?

(c) Which component will be collected from the middle part of the fractional distillation column ? Why ?

(d) What could the component X, Y and Z be ?