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

What type of reaction is represented by: A + BC → AC + B ?

2 / 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.

3 / 25

Mention whether it is physical or chemical changes :Curdling of milk

4 / 25

Which of the following gases can be used for the storage of fresh sample of an oil for a long duration?

5 / 25

Calcium oxide reacts vigorously with water to produce slaked lime. CaO(s) + H2O(l) → Ca(OH)2(aq) This reaction can be classified as:

  1. Combination reaction

  2. Exothermic reaction

  3. Endothermic reaction

  4. Oxidation reaction

6 / 25

Which of the following is not a mineral acid?

7 / 25

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

8 / 25

Sodium hydrogen carbonate when added to acetic acid evolves a gas. Which of the following declaration are true about the gas evolved?

  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

Which of the subsequent is/are true when HCl(g) is passed through water?

  1. It does not ionise in the solution as it is a covalent compound

  2. It ionises in the solution

  3. It gives both hydrogen and hydroxyl ions in the solution.

  4. It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule

10 / 25

The source of oxyalic acid is

11 / 25

Which of the following declaration about the modern periodic table is accurate?

12 / 25

In Mendeleev’s periodic table, gaps were left for the elements to be discovered later. Which of the subsequent element found a place in the periodic table later?

13 / 25

Arrange the following elements in sequence of their increasing non-metallic character Li, O, C, Be and F.

14 / 25

Which of the following is the outermost shell for elements of period 2

15 / 25

The atomic number of an element is 20, its electronic configuration.

16 / 25

A molecule of ammonia (NH3) has:

17 / 25

Unsaturated hydrocarbon undergoes incomplete combustion and burns with

18 / 25

The compounds have low melting and boiling points.

19 / 25

Molecular formula of Methane

20 / 25

The molecular formula of the fourth member of alkane series.

21 / 25

Shwetha took three beakers A, B and C containing zinc sulphate, silver sulphate and iron (II) sulphate solutions respectively. Copper pieces were added to each beaker. The solution will Become visible blue in the case of:

22 / 25

2 ml each of conc. HCl, HNO3, and a mixture of conc. HCl and conc. HNO3 in the ratio of 3:1 were taken in test tubes labelled as : A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C. The metal could be:

  1. AI

  2. Au

  3. Cu

  4. Pt

23 / 25

Which metal can be displaced by copper from its salt solution?

24 / 25

Name a metal that have very low melting points.

25 / 25

Give the formula of the stable binary compounds that would be formed by the combination of following pair of elements: Li and O2

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