CBSE Class X – Science Chemistry + Biology + Physics Exam (Full Syllabus)

This test is designed based on NCERT Syllabus for Class 10 Topics of Science – Chemistry , Biology and Physics

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

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.Why does the colour of the solution fades?

due to its reaction with hydrogen sulphide gas and results into the formation of colourless solution of sulphuric acid.

due to its reaction with Copper sulphate gas and results into the formation of colourless solution of sulphuric acid.

Both 1 & 2

all of these

2 / 25

State the reactions are exothermic or endothermic in nature: Dissolution of ammonium chloride in water

exothermic reaction

endothermic reaction

Both 1 & 2

none of these

3 / 25

What will take place when the solution of an acid is blend with the solution of a base in a test tube?

The temperature of the solution increases

The temperature of the solution decreases

The temperature of the solution remains the same

Salt formation takes place

1 and 4

1

1 and 3

2 and 4

4 / 25

Common name calcium sulphate hemihydrate

lime stone

Plaster of paris

white stone

none

5 / 25

Which of the subsequent oxide(s) of iron would be obtained on prolonged reaction of iron with steam?

FeO

Fe₂O₃

Fe₃O₄

Fe₂O₃ and Ce₃O₄

6 / 25

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

Sulphur

Oxygen

Nitrogen

Iodine

7 / 25

The number of covalent bonds in the molecule of ethane.

4

7

3

1

8 / 25

The next homologue of C₂H₄

C₃H₆

C₄H₅

C₃H₅

C₃H₇

9 / 25

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

1-Bromo Propane

2-Bromo Propane

3-Bromo Propane

4-Bromo Propane

10 / 25

The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belongs to the identical group?

A and B

B and D

A and C

D and E

11 / 25

The electronic confgurations of three elements X, Y and Z are: X : 2 Y : 2, 8, 7 Z : 2, 8, 2 Which of the following is true regarding these elements?

X is a metal

Y is a metal

Z is a non-metal

Y is a non-metal and Z is a metal

12 / 25

In which part of the alimentary canal food is ultimately digested?

Stomach

Mouth cavity

Large intestine

Small intestine

13 / 25

How many chambers are there in the heart of an amphibian?

2

3

4

6

14 / 25

Choose the precise statement(s) on budding in yeast from the following:

A parent cell divides into two or more daughter cells and here the parent identity is lost

In this the elongated nucleus divides to form two or more daughter nuclei.

A bud arises from a particular region on a parent body

After detaching from the parent body the bud grows into a new independent individual

15 / 25

What is the mode of asexual reproduction in hydra?

Fragmentation

Binary Fission

Spore Formation

Regeneration Or Budding

16 / 25

Which pollination increases genetic uniformity and decreases variations

Cross Pollination

Self Pollination

Both 1 & 2

None Of These

17 / 25

Name the plant Mendel used of F1 & F2 generation cross of tall and short plant experiment.

Garden pea

Tomato

Brinjal

All vegetables

18 / 25

Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that:

Reptiles have evolved from birds

There is no evolutionary connection between reptiles and birds.

Feathers are homologous structures in both the organisms.

Birds have evolved from reptiles.

19 / 25

When a fine beam of sunlight enters a smoke filled room, smoke particles become visible due to scattering of light by these particles

Tyndall effect

Dispersion of light

Scattering of light

Reflection of light

20 / 25

Power of a lens is

1/f

1/T

1/fT

none

21 / 25

Rainbow is caused due to

Dispersion of light

Scattering of light

Refraction of light

Reflection of light

22 / 25

The maximum resistance which can be made using four resistors each of 2 Ohm

6 ohm

8 Ohm

2 ohm

10 ohm

23 / 25

An ideal ammeter is one which has

infinite resistance

zero resistance

finite resistance

no resistance

24 / 25

In electric motor, to make the coil rotating constantly in the identical direction, current is reversed in the coil after every half rotation by a device called:

carbon brush

commutator

slip ring

armature

25 / 25

Which of the following is not attracted by a magnet:

Steel

cobalt

nickel

brass

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CBSE Class X – Science Chemistry + Biology + Physics Exam (Full Syllabus)

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