ACID AND ALKALI

Chemical compound that produces hydrogen ions, H+ when dissolves in water.

• Alkali

• Acid

• Solution

• Liquid

Choose the correct properties of acid :

• tastes sour

• pH value more than 7

• pH value less than 7

• change blue litmus paper to red

• react with metals to release hydrogen gas

Type of acid that contains carbon and usually found in plants and animals.

• Mineral acid

• Organic acid

• Inorganic acid

Mineral acid can be prepared from mineral salts and also know as _________________

• organic acid

• inorganic acid

• carbonic acid

Alkali is a chemical compound that produces _____________________ when it is dissolved in water.

• hydrogen ion, H+

• hydroxide ion, OH-

• oxygen ion, O-

Alkali is formed when _____________ dissolves in water.

• mineral salts

• metal hydroxide

• carbon oxide

• active metals

Properties of alkali :

• tastes bitter

• changes red litmus paper to blue

• changes blue litmus paper to red

• reacts with ammonium salt to produce ammonia gas

• pH more than 7

Acid and alkali only show their properties when dissolve in water.

• True

• False

Colour indicator that changes colour according to characteristics of the substances added to it.

• pH indicator

• litmus paper

• universal indicator

• phenolphthalein

• bases

Indicator that is made up of combination of several types of colours

• Litmus paper

• Phenolphthalein

• Universal indicator