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

Why are anti-oxidants added to fat and oil containing food items?

To prevent oxidation

to increase oxidation

to prevent reduction

all of these

2 / 25

Mention whether it is physical or chemical changes:- Burning of Liquefied Petroleum Gas (LPG)

chemical

physical

Both 1 & 2

none of these

3 / 25

Mention whether it is physical or chemical changes: Sublimation of solid ammonium chloride

physical

chemical

Both 1 & 2

none of these

4 / 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

5 / 25

When copper turning are added to silver nitrate solution, a blue coloured solution is formed after some time. It is because copper ?

Displaces silver from the solution

Forms a blue colored complex with AgNO₃

Is oxidized to Cu₂₊

Is reduced to Cu₂₊

6 / 25

Which of the consequent will turn phenolphthalein pink?

NaOH(aq)

HCl(aq)

CH₃COOH(aq)

H₂O

7 / 25

Which of the following solutions in water does not conduct electricity?

Hydrochloric acid

Sodium chloride

Glucose

Sulphuric acid

8 / 25

To preserve tooth decay we are advised to brush our teeth regularly. The nature of the toothpaste commonly used is:

Acidic

Neutral

Basic

Corrosive

9 / 25

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

Strong acid and strong base

Weak acid and weak base

Strong acid and weak base

Weak acid and strong base

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

Which of the following are the characteristics of isotopes of an element?

Isotopes of an element have the same atomic masses.

Isotopes of an element have the same atomic number

Isotopes of an element show the same physical properties.

Isotopes of an element show the same chemical properties.

2 and 4

1 and 3

2 and 3

1 and 4

13 / 25

The number of Periods in the Modern Periodic Table are

6

7

2

1

14 / 25

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

2, 8, 4, 2,

2, 8, 8, 2,

4, 8, 8, 2,

8, 8, 2,2

15 / 25

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

Metal

Non metal

Metalloids

Metal, non-metal and metalloid respectively

16 / 25

The organic compounds having functional group are known as:

Aldehyde

Ketone

Carboxylic acids

Alcohol

17 / 25

The property of self-linkage among identical atoms to form long chain compounds is known as:

Catenation

Isomerisation

Superposition

Halogenation

18 / 25

Ethane is

saturated hydrocarbon

unsaturated hydrocarbon

both 1 & 2

none

19 / 25

Saturated hydrocarbons contains

double covalent bonds

three covalent bonds

four covalent bonds

single covalent bonds

20 / 25

The molecular formula of the fourth member of alkane series.

C₅H₁₀

C₄H₁₀

C₆H₁₀

C₇H₁₀

21 / 25

Non-metals are not lustrous. Which of the following non-metals is lustrous?

Sulphur

Oxygen

Nitrogen

Iodine

22 / 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:

Beaker A

Beaker B

Beaker C

Beaker B and C

23 / 25

When calcium metal is added to water, the gas evolved does not catch fire but the same gas evolved on adding potassium metal to water catches fire.

Due to high exothermic hydrogen evolved immediately catches fre

Due to low exothermic hydrogen evolved immediately catches fre

Due to high endothermic hydrogen evolved immediately catches fre

Due to low endothermic hydrogen evolved immediately catches fre

24 / 25

which metal is more reactive?

calcium

sodium

both 1 & 2

none of these

25 / 25

Which metal is less reactive?

magnesium

calcium

both 1 & 2

none of these

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CBSE Class X – Science Chemistry Exam (Full Syllabus)

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