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: Fe₂O₃ + 3CO → 2Fe + 3CO₂

CO

Fe

CO₂

Fe₂O

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.Name the type of reaction taking place.

double displacement reaction

single displacement reaction

double replacement reaction

all of these

3 / 25

Which of the following is not a physical change?

Boiling of water to give water vapour

Melting of ice to give water

Dissolution of salt in water

Combustion of Liquefed Petroleum Gas

4 / 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

5 / 25

Which of the following are combination reactions?

KClO₃ →^(Heat)→ 2KCl + 3O₂

MgO + H₂O → Mg(OH)₂

4Al + 3O₂ → 2Al2O₃

Zn + FeSO₄ →ZnSO₄ + Fe

1 and 4

3 and 4

2 and 4

2 and 3

6 / 25

Which of the consequent will turn phenolphthalein pink?

NaOH(aq)

HCl(aq)

CH₃COOH(aq)

H₂O

7 / 25

If 10 mL of H₂SO₄ is mixed with 10 mL of Mg(OH)₂ of the same concentration, the resultant solution will give the following colour with universal indicator:

Red

Yellow

Green

Blue

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

The chemical formula for methonic acid

H2COH

HOOCH

HCOOH

None

10 / 25

The source of Acetic acid is

lime

vinegar

orange

none

11 / 25

An element X with atomic number 12 forms a compound with element Y with atomic number 17. The formula of the compound formed is:

XY

XY₂

X₂Y

X₂Y₃

12 / 25

Arrange these elements in increasing order of their atomic radii

Boron Lithuim Beryllium

Beryllum Lithium Boron

Lithium Beryllium Boron

Lithuim Boron Beryllium

13 / 25

Which is not true about the noble gases?

They exist in atomic form

They are non metallic in nature

Xenon is the most reactive.

They are radioactive in nature

14 / 25

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

10

6

8

2

15 / 25

Is calcium?

metal

non metal

both

none of these

16 / 25

The organic compounds having functional group are known as:

Aldehyde

Ketone

Carboxylic acids

Alcohol

17 / 25

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

3-Butene

Prop-1-ene

But-1-ene

Butyne

18 / 25

The strong electrostatic interactions between ions formed by the transfer of electrons

covalent compounds

ionic compounds

both 1 & 2

none

19 / 25

Molecular formula of Methane

CH₆

CH₄

CH₅

CH₃

20 / 25

The next homologue of C₂H₄

C₃H₆

C₄H₅

C₃H₅

C₃H₇

21 / 25

What occurs when calcium is treated with water?

It does not react with water.

It reacts violently with water. I

t reacts less violently with water.

Bubbles of hydrogen gas formed stick to the surface of calcium.

3 and 4

1 and 3

2 and 3

1 and 4

22 / 25

Which of the consecutive are not ionic compounds?

KCl

HCl

CCl₄

NaCl

2 and 3

1 and 2

1 and 3

3 and 4

23 / 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

24 / 25

Hydrogen gas is not evolved when a metal reacts with nitric acid because

nitric acid is a strong oxidising agent.

nitric acid is a strong reducing agent.

nitric acid is a strong neutralising agent.

non of these

25 / 25

Name one metal that exist in liquid state at room temperature.

bromine

mercury

sodium

silver

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CBSE Class X – Science Chemistry Exam (Full Syllabus)

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