Home Courses Tests Questions
Hindi Version of the Questions with Green background are available only
objective Ques (10 results)
1)

 Which one of the following processes involve chemical reactions?

Class 10 Science
A)

Storing of oxygen gas under pressure in a gas cylinder.

B)

Liquefaction of air.

C)

Keeping petrol in a China dish in the open.

D)

Heating copper wire in presence of air at high temperature.

2)

 A teacher gave two test tubes to the students, one containing water and the other containing sodium hydroxide. She asked them to identify the test tube containing sodium hydroxide solution. Which one of the following can be used for the identification?

Class 10 Science
A)

Blue litmus

B)

Red litmus

C)

Sodium carbonate solution

D)

Dilute hydrochloric acid

3)

Which of the following is not physical change?

Class 10 Science
A)

Boiling of water to give water vapour

B)

Melting of ice to give water

C)

Dissolution of salt in water

D)

Combustion of Liquefied Petroleum Gas (LPG)

4)

Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved?

Class 10 Science
A)

Displacement reaction

B)

precipitation and double displacement reaction

C)

Combination reaction

D)

Double displacement reaction

5)

Which of the following is true for an unbalanced chemical equation?

Class 10 Science
A)

Number of atoms is equal on both sides of the equation

B)

Number of atoms is less on the left side of the equation

C)

Number of atoms is more on the right side of the equation

D)

Both (b) and (c)

6)

Which option denotes a double displacement reaction?

Class 10 Chemistry
A)

A + B + C

B)

A + B → C

C)

AC + BD → AD + BC

D)

AC + B → AB + C

7)

Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is

Class 10 Chemistry
A)

2:1

B)

2:11

C)

12:1

D)

2:13

8)

Which of the following is Not True with respect to the neutralisation reaction?

Class 10 Chemistry
A)

Salt is formed

B)

Reaction occurs between an acid and a base

C)

Reactive element displaces less reactive element

D)

Reactants are in gaseous state

9)

In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?

Class 10 Chemistry
A)

Lead sulphate (insoluble)

B)

Lead acetate

C)

Ammonium nitrate

D)

Potassium sulphate

10)

When do you use double arrow in a chemical equation? 

Class 10 Chemistry
A)

When reaction is reversible.

B)

When reaction proceeds in forward direction.

C)

When reversible reaction is at equillibrium.

D)

None of these.

showing 1 - 10 results of 10 results
onlinetest practiceQue