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- 1. Multiple Choice
Which of the following salts does not contain water of crystallisation?
Blue Vitriol
Baking soda
Washing soda
Gypsum
- 2. Multiple Choice
A: Baking powder is used in making cake instead of using baking soda.
R: Baking powder contains tartaric acid which reacts with sodium carbonate and removes the bitter taste.
Both A & R are true and R is the correct explanation of A
Both A & R are true and R is not the correct explanation of A
A is true but R is false
A is false but R is true.
- 3. Multiple Choice
The colour of neutral litmus solution is
red
blue
purple
yellow
- 4. Multiple Choice
Which of the following indicators is an olfactory indicator?
litmus
vanilla
turmeric
phenolphthalein
- 5. Multiple Choice
When a drop of unknown solution X is placed on a strip of pH paper, a deep red colour is produced. Identify the unknown solution.
Sodium hydroxide
Hydrochloric acid
Acetic acid
Water
- 6. Multiple Choice
Solid sodium bicarbonate was placed on a strip of pH paper. The colour of the strip
turns red
did not change
turned green and slightly yellow
turned pink
- 7. Multiple Choice
To relieve pain due to acidity, we can take
sour milk
lemon juice
orange juice
milk of magnesia
- 8. Multiple Choice
Which of the following salts is basic in nature?
- 9. Multiple Choice
Which one of the following is required to identify the gas evolved when dilute hydrochloric acid reacts with sodium carbonate?
blue litmus paper
red litmus paper
a burning splinter
lime water
- 10. Multiple Choice
The pH of a sample of pure water is 7 at room temperature. What is its pH when a pinch of sodium hydroxide is dissolved in it?
Less than 7
More than 7
Equal to 7
None of these
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