Which gas is evolved when acids react with metals?

Chemical formula of baking soda is:

Egg shell is made up of

Which of the following is not a acidic salt?

Lime water reacts with chlorine to give

A solution has turned the colour of red litmus paper to blue. The pH of the solution is approximately:

Sodium hydroxide turns phenolphthalein solution

Tooth enamel is made up of

Sodium hydroxide is used

Farmers neutralise the effect of acidity of the soil by adding

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

Which one of the following salts does not contain water of crystallisation?

Sodium hydroxide is a

Tomato is a natural source of which acid?