CBSE Class X – Science Chemistry Exam (Full Syllabus)

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CBSE Class X – Science Chemistry Exam (Full Syllabus)

This test is designed based on NCERT Syllabus for Class 10 Topics of Science – Chemistry

  • Each time random 25 questions will be displaced from the question bank of 500 + Questions
  • So we recommend you to retake the quiz till you have mastered all the questions

1 / 25

When hydrogen sulphide gas is passed through a blue solution of copper sulphate, the colour of the solution fades and a black precipitate is obtained.Write the chemical name of the black precipitate formed.

2 / 25

In the electrolysis of water, name the gases liberated at cathode

3 / 25

In the electrolysis of water, name the gases liberated at anode

4 / 25

On heating blue coloured powder of copper (II) nitrate in a boiling tube, copper oxide (black), oxygen gas and a brown gas X is formed. Identify the brown gas X evolved.

5 / 25

The following reaction is an example of a: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)

  1. Displacement reaction

  2. Combination reaction

  3. Redox reaction

  4. Neutralisation reaction

6 / 25

Which of the following gives the exact increasing order of acid strength?

7 / 25

Baking soda is a blend of:

8 / 25

Which of the subsequent phenomena occur, when a slight amount of acid is added to water?

  1. It turns lime water milky

  2. It extinguishes a burning splinter.

  3. It dissolves in a solution of sodium hydroxide.

  4. It has a pungent odour

9 / 25

The source of lactic acid is

10 / 25

The source of Acetic acid is

11 / 25

Which among the following elements has the largest atomic radii?

12 / 25

Which of the subsequent elements will form an acidic oxide?

13 / 25

Arrange these elements in decreasing order of their atomic radii

14 / 25

The formulae of chlorides of Eka-aluminium, the elements predicted by Mendeleev.

15 / 25

Three elements B, Si and Ge are: Metalloids (d)

16 / 25

The electronic configuration of an element is found to be 2, 4. How many bonds can one carbon atom form in a compound?

17 / 25

How many number of carbon atoms are joined in a spherical molecule of buckminsterfullerene?

18 / 25

The formula of cyclopentane

19 / 25

A saturated hydrocarbon undergoes complete combustion and burns with

20 / 25

Molecular formula of Methane

21 / 25

Which one of the following metals does not respond with cold as well as hot water?

22 / 25

In the given reaction, Al2O3 + NaOH → …X… + H2O. What is element X?

23 / 25

Which of the following Metal have very low melting points?

24 / 25

The poorest conductor of heat among metals is

25 / 25

Why should we not throw small pieces of sodium into a sink in the laboratory? Because of

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