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

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

H₂O

F₂

HF

O₂

2 / 25

State the reactions exothermic or endothermic in nature: Dilution of sulphuric acid

endothermic reaction

exothermic reaction

Both 1 & 2

none of these

3 / 25

An old person complained of acute pain in stomach. Doctor gave small antacid tablet and he got immediate relief. What actually happened?

anatacids added excess acid in his stomach

anatacids neutralized the excess acid in his stomach

anatacids removed the excess acid in his stomach

none

4 / 25

The source of oxyalic acid is

cucumber

coriander

Potato

Tomato

5 / 25

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

NaAlO2

Na3Al

Na2O3

NaAl2O3

6 / 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

7 / 25

Which of the followings is the major constituent of the liquefied petroleum gas?

Methane

Ethane

Propane

Butane

8 / 25

What is denatured alcohol?

Ethyl alcohol which has been made unfit for drinking purpose by adding small amount of poisonous substance

Methyl alcohol which has been made unfit for drinking purpose by adding small amount of poisonous substance

Alcohol having properties of an acid

Ethyl alcohol containing 60% of water by weight

9 / 25

The next homologue of C₂H₄

C₃H₆

C₄H₅

C₃H₅

C₃H₇

10 / 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

11 / 25

Which of the subsequent elements will form an acidic oxide?

An element with atomic number 7

An element with atomic number 3

An element with atomic number 12

An element with atomic number 19

12 / 25

Oxygen liberated during photosynthesis comes from:

Water

Chlorophyll

Carbon dioxide

Glucose

13 / 25

Is it necessary to separate oxygenated and deoxygenated blood in mammals and birds.

Yes

No

May be yes

May be no

14 / 25

Fertilisation is the process of

Transfer of male gamete to female gamete

Fusion of nuclei of male and female gamete.

Adhesion of male and female reproductive organs

The formation of gametes by a reproductive organ

15 / 25

Factors responsible for the rapid spread of bread mould on slices of bread are:

Large number of spores

Availability of moisture and nutrients in the bread

Presence of tubular branched hyphae

Formation of round shaped sporangia

1

2

1 And 2

1 and 3

16 / 25

Which of the following is a bacterial STD?

Gonorrhoea

Warts

HIV

None Of These

17 / 25

Assertion (A) : Inheritance from the previous generation provides subtle changes in body design for the next generation. Reason (R) : Greater diversity will be generated if asexual reproduction is involved.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true but (R) is not the correct explanation of the assertion

(A) is true but (R) is false

(A) is false but (R) is true

18 / 25

Select the inappropriate statement:

The frequency of certain genes in a population change over several generations resulting in evolution.

The reduction in the weight of an organism due to starvation is genetically controlled.

Low weight parents can have heavy weight progeny.

Traits which are not inherited over generations do not cause evolution.

19 / 25

The sun appears red at sunset or sunrise. Choose the incorrect statement from the following

Light from the sun near the horizon passes through the layers of air.

Light from the sun near the horizon travels larger distance in the earth’s atmosphere before reaching our eyes. (c)

Most of the blue light and longer wavelengths are scattered away by the particles.

Most of the blue light and shorter wavelengths are scattered away by the

20 / 25

The density of the atmosphere, as we know goes on decreasing as the distance above the sea level increases,this phenomeneon is called

Atmospheric refraction

Refraction of light

Atmospheric Reflection

None

21 / 25

Visible spectrum is the band of coloured components of a

red light beam

white light beam

blue light beam

black light beam

22 / 25

A cooler of 1500 W, 200 volt and a fan of 500 W, 200 volt are to be used from a household supply. The rating of fuse to be used is:

2.5 A

5.0 A

7.5 A

10:00 AM

23 / 25

The condition for the credibility of Ohm’s law is that the

Temperature should remain constant

Current should be proportional to voltage

Resistance must be wire wound type

All of the above

24 / 25

An electron moves with a speed v along positive direction of the x-axis. If a magnetic feld B acts along the positive y-direction, then the force on the electron will act along

x axis

y axis

–ve z-direction

+ve z-direction

25 / 25

A device that can convert electrical energy into mechanical energy is

Galvanamoter

electric motor

ammeter

voltmeter

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

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