Acid and Alkalis

Litmus paper is --- in acid

• green

• blue

• red

Tamarind contained -- acid

• citric acid

• Tartaric acid

• Malic acid

Who named hydrogen gas as hydrogen

• Hentry Cavendish

• Lavoisier

• Archimedes

when acids react with carbonates - gas is formed

• Hydrogen

• carbon dioxide

• oxygen

--- are substances that help us to distinguish between acids and alkalis through colour change

• indicators

• PH value

• Neutralisation

The PH value of pure water is

• 10

• 3

• 7

The PH values of different soil samples are given which of the soils should be treated with lime ?

• 7

• 5

• 9

Acid + Alkali = --- + water

• Salt

• Acid

• Alkali

--- is a mixture of different indicators

• universal indicator

• PH paper

• phenolphthalein

Doctors prescribe medicines containing --- to overcome acidity

• Alkali

• Acid

• water