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

Which reaction takes place when layer of silver deposit on copper wire when dipped in silver nitrate solution?

displacement reaction

replacement reaction

oxidation

reduction reaction

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.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

3 / 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

4 / 25

On strong heating, blue coloured copper sulphate crystals turns

purple

red

white

blue

5 / 25

Which one of the following metals does not respond with cold as well as hot water?

Na

Ca

Mg

Fe

6 / 25

Name a metal that have very low melting points.

Gallium

Tungsten

platinium

Diamond

7 / 25

From which of the following substance pencil lead is formed?

Charcoal

Wood

Lead

Graphite

8 / 25

Cation is formed when:

Atom gains electrons

Atom loses electrons

Proton is lost by the atom

Atom shares electrons

9 / 25

Ethene is

saturated hydrocarbon

unsaturated hydrocarbon

both 1 & 2

none

10 / 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

11 / 25

The number of Periods in the Modern Periodic Table are

6

7

2

1

12 / 25

If salivary amylase is lacking in the saliva, which of the subsequent events in the mouth cavity will be affected?

Proteins breaking down into amino acids

Starch breaking down into sugars

Cats breaking down into fatty acids and glycerol.

Absorption of vitamins

13 / 25

The main excretony waste removed by kidneys from blood

Urea

Urine

salts

glucose

14 / 25

During adolescence, several changes occur in the human body. mark one change from the following associated with sexual maturation in boys:

Loss of milk teeth

Increase in height

Cracking of voice

Weight gain

15 / 25

Example of unisexual fowers.

Papaya

Mustard

Hibiscus

Rose

16 / 25

What is the mode of asexual reproduction in Amoeba?

Binary Fission

Fragmentation

Budding

Regeneration Or Budding

17 / 25

Assertion (A) : New combination of traits are observed in F2 offspring when tall plants with round seeds are crossed with short plants with wrinkled seeds. Reason (R) : Tallness and round seed are both dominant traits.

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

What is the phenotypic ratio obtained in Mendels dihybrid cross

9:3:3:1

9:3:2:1

9:3:1:1

9:9:3:1

19 / 25

At noon, the Sun looks white as:

light is least scattered

all the colours of the white light are scattered away

blue colour is scattered the most

red colour is scattered the most

20 / 25

In an experiment to trace the path of a ray of light through a triangular glass prism, a student would observe that the emergent ray

is parallel to the incident ray.

is along the same direction of incident ray

gets deviated and bends towards the thinner part of the prism.

gets deviated and bends towards the thicker part (base) of the prism.

21 / 25

The splitting of light into its component colours is called

Dispersion of light

Scattering of light

Refraction of light

Reflection of light

22 / 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

23 / 25

The commercial unit of electrical energy

kilo hour

watt hour

kilowatt hour

none

24 / 25

The nature of magnetic field line passing through the centre of current carrying circular loop is:

circular

ellipse

parabolic

straight line

25 / 25

A D.C generator works on the theory of:

ohnis law

Joule’s law of heating

faraday’s law of electromagnetic induction.

none of the above

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

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