EASY
7th CBSE
IMPORTANT
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acids when added to water completely dissociate and give hydrogen ions.

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Important Questions on Acids, Bases and Salts

EASY
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 5 - Acids, Bases and Salts>Chapter Review>Q 3

Substances which are neither acidic nor basic are called _____ substances.

EASY
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 5 - Acids, Bases and Salts>Chapter Review>Q 4

Phenolphthalein and methyl orange are the examples of _____ indicators.

EASY
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 5 - Acids, Bases and Salts>Chapter Review>Q 5
When an acid is mixed with _____ a neutralisation reaction takes place.
EASY
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 5 - Acids, Bases and Salts>Chapter Review>Q 1

Most of the mineral acids are weak.

EASY
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 5 - Acids, Bases and Salts>Chapter Review>Q 2

Bases have soapy touch and bitter taste.

MEDIUM
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 5 - Acids, Bases and Salts>Chapter Review>Q 3

Litmus is a natural indicator which is obtained from lichens.

EASY
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 5 - Acids, Bases and Salts>Chapter Review>Q 4

Colour of phenolphthalein does not change in acidic or neutral medium.

EASY
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 5 - Acids, Bases and Salts>Chapter Review>Q 5
Neutralisation is an exothermic process.