Differentiate between acidic and basic substances.

Important Questions on Different Kinds of Materials

MEDIUM

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

What are indicators? Give examples.

MEDIUM

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

Window cleaning solution contains ammonium hydroxide. When a drop of this solution is put on red litmus paper, it turns blue. Explain.

MEDIUM

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

Why do you need indicators?

MEDIUM

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

How is China rose indicator prepared?

MEDIUM

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

Sodium chloride salt is used for cooking. It is formed when hydrochloric acid is added to sodium hydroxide solution, both of which are corrosive in nature. But sodium chloride is not. Give reasons.

MEDIUM

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

Why does a vegetable stain turn reddish-brown when washed with soap solution?

HARD

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

You are provided with a solution which is bitter in taste and soapy to touch. It is used to manufacture soap. What will happen if a drop of methyl orange is added to it?

MEDIUM

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

What is the chemical nature of distilled water?