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10th ICSE
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During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to: 

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Important Questions on Acids, Bases and Salts

MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 4
Which of the following salts does not contain water of crystallisation?
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10th ICSE
IMPORTANT
Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 5
Sodium carbonate is a basic salt because it is a salt of: 
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10th ICSE
IMPORTANT
Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 6
Calcium phosphate is present in tooth enamel. Its nature is:
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10th ICSE
IMPORTANT
Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 7
A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue? 
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10th ICSE
IMPORTANT
Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 8
One of the constituents of baking powder is sodium hydrogen carbonate, the other constituent is: 
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10th ICSE
IMPORTANT
Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 9
To protect tooth decay we are advised to brush our teeth regularly. The nature of the tooth paste commonly used is: 
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10th ICSE
IMPORTANT
Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 10

Which of the following statements is correct about an aqueous solution of an acid and of a base? 

(i) Higher the pH, stronger the add (ii) Higher the pH, weaker the acid

(iii) Lower the pH, stronger the base (iv) Lower the pH, weaker the base

HARD
10th ICSE
IMPORTANT
Science Chemistry>Chapter 2 - Acids, Bases and Salts>ASSESSMENT>Q 11

Which of the following phenomena occur, when a small amount of acid is added to water? 

(i) Ionisation (ii) Neutralisation

 (iii) Dilution (iv) Salt formation