Chapter 2 – Acids, Bases and Salts

Assertion: Universal indicator gives green colour with distilled water.
Reason: pH of distilled water is 7 and it is neutral and universal indicator gives green colour with neutral solution.

NaHCO, formed by reaction of

Calcium phosphate is present in tooth enamel. Its nature is

An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?

Egg shell is made up of

Which of the following is not a acidic salt?

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

Sodium hydroxide turns phenolphthalein solution

Sodium hydroxide is a

Rain is called acid rain when its:

Tooth enamel is made up of

What is the pH range of human body?

A drop of liquid sample was put on the pH paper, paper turned blue. The liquid sample must be of

Lime water reacts with chlorine to give

At what temperature is gypsum heated to form Plaster of Paris?

Na2CO3 . 10H2O is

Sodium carbonate is a basic salt because it is a salt of a

Tomato is a natural source of which acid?

Brine is an

What is formed when zinc reacts with sodium hydroxide?

When hydrogen chloride gas is prepared on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to

Plaster of Paris is made from

Assertion: Bleaching power liberate chlorine when kept in atmosphere.
Reason: CaOCl2 reacts with CO2 present in atmosphere to form CaCO3 and chlorine gas.

Assertion: Ammonium hydroxide is Weak Base
Reason: Phenolphthalein becomes pink in NH2OH

Ag2S reacts with H2SO4 to form

A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?

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

How many water molecules does hydrated calcium sulphate contain?

10 mL of a solution of NaOH is found to be completely neutralized by 8 mL of a given solution of HCl. If we take 20 mL of same solution of NaOH, the amount of HCl solution required to neutralize it will be