MEDIUM
7th CBSE
IMPORTANT
Earn 100
China rose has different colours in acidic, basic and neutral medium.
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Important Questions on Different Kinds of Materials
EASY
7th CBSE
IMPORTANT
_____ are used to test acidic and basic nature of solution.
MEDIUM
7th CBSE
IMPORTANT
Calamine lotion contains _____.
EASY
7th CBSE
IMPORTANT
_____ indicator is reddish-brown in basic medium.
HARD
7th CBSE
IMPORTANT
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
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
MEDIUM
7th CBSE
IMPORTANT
A solution turns red litmus paper blue. If a drop of phenolphthalein is added to it,
MEDIUM
7th CBSE
IMPORTANT
Which of the following statement is true?
MEDIUM
7th CBSE
IMPORTANT
Orange juice is sour in taste due to presence of
