A solution turns red litmus blue ,its pH is likely to be -

• 1

• 4

• 5

• 10

A solution reacts with crushed egg shells to give a gas that turns lime -water milky.

• NaCl

• HCl

• LiCl

• KCl

Which one of the following types of medicines is used for treating indigestion?

• Antibiotic

• Analgesic

• Antacid

• Antiseptic

Calcium phosphate is present in tooth enamel. Its nature is-

• basic

• acidic

• neutral

• amphoteric

which of the following salts does not contain water of crystallisation?

• Blue vitriol

• Baking soda

• Washing soda

• Gypsum

Which one of the following can be used as an acid -base indicator by a visually impared student?

• Litmus

• Turmeric

• Vanilla essence

• Petunia leaves

Which of the following is acidic in nature?

• Lime Juice

• Human blood

• Lime water

• Antacid

Which of the following is not a mineral acid?

• Hydrochloric acid

• Citric acid

• Sulphuric acid

• Nitric acid

Plaster of Paris is obtained by heating:

• Gypsum

• Limestone

• Sodium chloride

• Acetic acid

Metal hydrogen carbonates react with acids to give

• salt ,water , chlorine

• salt , water and carbon di oxide

• salt and carbon di oxide

• salt , hydrogen and carbon dioxide