How is cream separated from milk?

Important Questions on Is Matter Around Us Pure

EASY

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Short Answer Type Questions>Q 62

Explain how, impure copper sulphate can be purified by crystallisation.

EASY

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Short Answer Type Questions>Q 63

Which method is better for recovering sugar from sugar solution: evaporation or crystallisation? Give a reason for your answer. 
 

MEDIUM

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Short Answer Type Questions>Q 64

What is chromatography? State its two applications. 

MEDIUM

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Short Answer Type Questions>Q 65

Which of the following can be separated by using a separating funnel and which cannot be separated by using a separating funnel? 
(a) water and kerosene mixture
(b) water and acetone mixture
Give reasons for your answer.

HARD

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Long Answer Type Questions>Q 66

With the help of a labelled diagram, describe the method of separating ammonium chloride from a mixture of ammonium chloride and common salt. Mention the difference in the properties of ammonium chloride and sodium chloride which has made this separation possible. 

HARD

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Long Answer Type Questions>Q 67

How can you obtain pure water from a salt-water mixture (or salt-solution)? Draw a neat and labelled diagram of the apparatus you would use to obtain pure water from a salt-water mixture (or salt-solution).

HARD

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Long Answer Type Questions>Q 68

How is water purified on a large scale at water works? Explain with the help of a labelled diagram. Name the substance which is added to kill germs in the drinking water supply?

MEDIUM

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 2 - Is Matter Around Us Pure>Long Answer Type Questions>Q 69

What is fractional distillation? What is the use of fractionating column in fractional distillation?