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

Identify the reducing agent in the following reactions: 2H₂O + 2F₂ → 4HF + O₂

H₂O

F₂

HF

O₂

2 / 25

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

CO

Fe

CO₂

Fe₂O

3 / 25

Mention whether it is a physical or chemical changes: -Evaporation of petrol

physical

chemical

Both 1 & 2

none of these

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 among the following is (are) double displacement reaction(s)?

Pb + CuCl₂ → PbCl₂ + Cu

Na₂SO₄ + BaCl₂ → BaSO₄ + 2NaCl

C + O₂ → CO₂

CH₄ + 2O₂ → CO₂ + 2H₂O

1 and 4

2

1 and 2

3 and 4

6 / 25

Common salt other than being used in kitchen can also be used as the raw material for making:

Washing soda

Bleaching powder

Baking soda

Slaked lime

1 and 3

1 and 2

1, 2 and 3

1, 3 and 4

7 / 25

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

It turns lime water milky

It extinguishes a burning splinter.

It dissolves in a solution of sodium hydroxide.

It has a pungent odour

1,2 and 3

1 and 2

1 and 4

2, 3 and 4

8 / 25

The source of Acetic acid is

lime

vinegar

orange

none

9 / 25

How many water molecules are present in plaster of paris

one third

half

4

2

10 / 25

Common name calcium sulphate hemihydrate

lime stone

Plaster of paris

white stone

none

11 / 25

Where would you establish the element with electronic confguration 2, ǫ in the modern periodic table?

Group 8

Group 2

Group 18

Group 10

12 / 25

Which of the subsequent is the outermost shell for elements of period 2?

K shell

L shell

M shell

N shell

13 / 25

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

F < O < C < Be < Li

Li < Be < C < O < F

F < O < C < Be < Li

F < O < Be < C < Li

14 / 25

Arrange these elements in decreasing order of their atomic radii

Lithuim Boron Berium

Berium Lithium Boron

Lithium Beium Boron

Boron Lithuim Berum

15 / 25

The metallic character vary across the period

It moves right to left in peroidic table

It moves left to right in peroidic table

Remains constant

none of these

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

The I.U.P.A.C name of CH₃CH₂CH=CH₂ is?

3-Butene

Prop-1-ene

But-1-ene

Butyne

18 / 25

Unsaturated hydrocarbon undergoes incomplete combustion and burns with

blue fame

red fame

white fame

yellow fame

19 / 25

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

covalent compounds

ionic compounds

both 1 & 2

none

20 / 25

UnSaturated hydrocarbons contains

double/triple covalent bonds

single covalent bonds

four covalent bonds

five covalent bonds

21 / 25

Metals are solid in nature. Which one of the Subsequent metals is found in liquid condition at room temperature?

Na

Fe

Cr

Hg

22 / 25

An element A is mushy and can be cut with a knife. This is very reactive to air and cannot be kept in open air. It reacts vigorously with water. Identify the element from the following:

Mg

Na

P

Ca

23 / 25

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

Sulphur

Graphite

PVC

All can be used

24 / 25

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

NaAlO2

Na3Al

Na2O3

NaAl2O3

25 / 25

The Most malleable and ductile metal

mercury

sodium

gold

silver

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CBSE Class X – Science Chemistry Exam (Full Syllabus)

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