Acids Bases And Salts Mock Tests

26 questions available

Acids Bases And Salts Mock Test 1

Questions: 26

Sample Questions

Class 10 Science

When calcium carbonate reacts with dilute hydrochloric acid, a gas is evolved that turns lime water milky. The gas is:

A Hydrogen

B Oxygen

C Carbon dioxide

D Calcium chloride

Class 10 Science

An element X reacts with oxygen to form X₂O. This oxide dissolves in water to turn red litmus paper blue. Which of the following elements is most likely to be X?

A Carbon

B Sodium

C Iron

D Copper

Class 10 Science

The pH of a solution is 3. What will be its pH after diluting it tenfold?

A 1

B 2

C 4

D 6

Class 10 Science

Which of the following substances has the highest pH value?

A Hydrochloric acid

B Sodium chloride solution

C Sodium hydroxide solution

D Vinegar (acetic acid)

Class 10 Science

Which of the following salts, when dissolved in water, will produce a solution with a pH less than 7?

A Sodium chloride

B Sodium carbonate

C Ammonium chloride

D Potassium nitrate

Class 10 Science

An acid solution turns pH paper orange-red. The pH value of this solution is most likely:

A 2

B 7

C 10

D 14

Class 10 Science

What happens when washing soda (Na₂CO₃·10H₂O) is left open in an open container?

A It dissolves in water (dissolves)

B It gains water (hygroscopic)

C It loses water of crystallisation (effloresces)

D It turns red litmus blue

Class 10 Science

The chemical formula of bleaching powder is:

A CaOCl₂

B Ca(OCl)₂

C CaCl₂

D CaOCl

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