EASY
7th CBSE
IMPORTANT
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Phenolphthalein is colourless in basic medium.

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Important Questions on Different Kinds of Materials

EASY
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C
If soil is too acidic, quicklime is added to it.
EASY
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C
Sulphuric acid is present in the stomach.
MEDIUM
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C
China rose has different colours in acidic, basic and neutral medium.
EASY
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C
_____ are used to test acidic and basic nature of solution.
MEDIUM
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C
Calamine lotion contains _____.
EASY
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C
_____ indicator is reddish-brown in basic medium.
HARD
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C

Match the given columns:

  Column A   Column B   Column C
1. Dilute hydrochloric acid (i) China rose (a) Yellow
2. Vinegar (ii) Blue litmus (b) Blue
3. Dilute calcium hydroxide (iii) Phenolphthalein (c) Red
4. Curd (iv) Turmeric (d) Colourless
5. Soap (v) Red litmus (e) Green

 

MEDIUM
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 5 - Different Kinds of Materials>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C
Atul was given a colourless solution in a test tube. He put a drop of this solution on blue litmus paper. It remained blue in colour. The colourless solution is