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 ?

oxidation reaction

replacement reaction

displacement reaction

none of these

2 / 25

Identify the reducing agent in the following reactions 4NH₃ + 5O₂ → 4NO + 6H₂O

O₂

NH₃

NO

H₂O

3 / 25

Identify the reducing agent in the following reactions: Fe₂O₃ + 3CO → 2Fe + 3CO₂

CO

Fe

CO₂

Fe₂O

4 / 25

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

Carbon dioxide or oxygen

Nitrogen or oxygen

Carbon dioxide or helium

Helium or nitrogen

5 / 25

Which of the following reactions is an endothermic reaction?

Burning of coal.

Decomposition of vegetable matter into compost

Process of respiration.

Decomposition of calcium carbonate to form quick lime and carbon dioxide

6 / 25

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

Water < acetic acid < hydrochloric acid

Water < hydrochloric acid < acetic acid

Acetic acid < water < hydrochloric acid

Hydrochloric acid < water < acetic acid

7 / 25

Which of the following substances will not give carbon dioxide on treatment with dilute acid?

Marble

Limestone

Baking soda

Lime

8 / 25

Identify the true representation of reaction occurring during chloralkali process.

2NaCl(l) + 2H₂O(l) → 2NaOH(l) + Cl₂(g) + H₂(g)

2NaCl(l) + 2H₂O(aq) → 2NaOH(aq) + Cl₂(g) + H₂(aq)

2NaCl(aq) + 2H₂O(l) → 2NaOH(aq) + Cl₂(aq) + H₂(aq)

2NaCl(aq) + 2H₂O(l) → 2NaOH(aq) + Cl₂(g) + H₂(g)

9 / 25

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

It turns lime water milky

It extinguishes a burning splinter.

It dissolves in a solution of sodium hydroxide.

It has a pungent odour

1 and 3

1 and 2

2 and 3

2 and 4

10 / 25

The other name of methanoic acid is

Formic acid

sulpuric acid

Hydrochloric acid

none

11 / 25

Arrange these elements in increasing order of their atomic radii

Carbon Nitrogen Oxygen Fluorine

Fluroine oxygen Nitrogen Oxygen

Nitrogen Oxygen Carbon Fluroine

Oxygen Nitrogen Fluroine Carbon

12 / 25

How many metals are present in second period of periodic table?

10

6

8

2

13 / 25

The number of Periods in the Modern Periodic Table are

6

7

2

1

14 / 25

Arrange the following elements in increasing order of their atomic radii:

F < N < Be < Li.

F < N < Li < Be.

Li < F < Be < N.

15 / 25

Arrange the following elements in increasing order of their atomic radii:

l < Br < Cl < At

At < Br < I < Cl

Cl < I < Br < At

Cl < Br < I < At

16 / 25

Which of the following statements about graphite and diamond is true?

They have the same crystal structure

They have the same degree of hardness

They have the same electrical conductivity

They can undergo the same chemical reactions

17 / 25

Cation is formed when:

Atom gains electrons

Atom loses electrons

Proton is lost by the atom

Atom shares electrons

18 / 25

The ability of an atom to form bonds with other atoms of the same element.

Carbonation

Catenation

Atom combination

Isomerism

19 / 25

The compounds formed by the sharing of electron pairs between two atoms.

covalent compounds

ionic compounds

both 1 & 2

none

20 / 25

Chemical name of the compound CH₃—CH₂—CH₂—Br

1-Bromo Propane

2-Bromo Propane

3-Bromo Propane

4-Bromo Propane

21 / 25

Electrical wires have a coating of an insulating material. The material, overall adopted is:

Sulphur

Graphite

PVC

All can be used

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:

AI

Au

Cu

Pt

2 and 4

1

2

1 and 3

23 / 25

Why do ionic compounds conduct electricity in molten state? Because

the ions move freely in molten state.

the ions move freely in solid state.

the ions move freely in gaseous state.

none of these

24 / 25

Metal that can be cut by knife

mercury

sodium

Iron

silver

25 / 25

Non-metal that can exist in diferent forms

gold

carbon

platinum

iodine

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CBSE Class X – Science Chemistry Exam (Full Syllabus)

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