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

Mention whether it is a physical or chemical changes: -Evaporation of petrol

physical

chemical

Both 1 & 2

none of these

2 / 25

Mention whether it is physical or chemical changes :Curdling of milk

chemical

physical

Both 1 & 2

none of these

3 / 25

Sate the reactions exothermic or endothermic in nature: Dissolution of sodium hydroxide in water

endothermic reaction

both 1 & 3

exothermic reaction

all of these

4 / 25

One of the following processess doesnot require a chemical reaction:

Melting of candle wax when heated

Burning of candle wax when heated

Digestion of food in your stomach

Ripening of banana

5 / 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

6 / 25

Which of the following is not a mineral acid?

Hydrochloric acid

Citric acid

Sulphuric acid

Nitric acid

7 / 25

identical volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. What would be the colour obtained?

Red

Yellow

Yellowish 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 source of Acetic acid is

lime

vinegar

orange

none

10 / 25

Hydrogen is used in manufacture

of ammonia for fertilizers and as Rocket fuel.

soaps

dyes

none

11 / 25

Which of the subsequent is the outermost shell for elements of period 2?

K shell

L shell

M shell

N shell

12 / 25

Arrange the following elements in sequence of their increasing non-metallic character Li, O, C, Be and F.

F < O < C < Be < Li

Li < Be < C < O < F

F < O < C < Be < Li

F < O < Be < C < Li

13 / 25

Arrange these elements in increasing order of their atomic radii

Carbon Nitrogen Oxygen Fluorine

Fluroine oxygen Nitrogen Oxygen

Nitrogen Oxygen Carbon Fluroine

Oxygen Nitrogen Fluroine Carbon

14 / 25

Which of the following is the outermost shell for elements of period 2

K shell

L shell

M shell

N shell

15 / 25

The atomic number of an element is 20, its valency is

2

8

16

4

16 / 25

Carbon exists in the atmosphere in the form of:

Only carbon monoxide

Carbon monoxide in traces and carbon dioxide

Only carbon dioxide

Coal

17 / 25

Which of the following substance produces brisk effervescence with baking soda solution?

Ethanoic acid

Table salt

Vinegar

Sunflower oil

18 / 25

Which of the following statements about graphite and diamond is true?

They have the same crystal structure

They have the same degree of hardness

They have the same electrical conductivity

They can undergo the same chemical reactions

19 / 25

Cation is formed when:

Atom gains electrons

Atom loses electrons

Proton is lost by the atom

Atom shares electrons

20 / 25

Ethane is

saturated hydrocarbon

unsaturated hydrocarbon

both 1 & 2

none

21 / 25

Which of the subsequent quality is generally not shown by metals?

Electrical conduction

Sonorous in nature

Dullness

Ductility

22 / 25

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

Sulphur

Oxygen

Nitrogen

Iodine

23 / 25

The electronic configurations of three elements X, Y and Z are X — 2, 8; Y — 2, 8, 7 and Z — 2, 8, 2. Which of the following is correct?

X is a metal

Y is a non-metal and Z is a metal

24 / 25

Which metal can be displaced by copper from its salt solution?

Silver & zinc

Silver & mercury

Iron & silver

Iron & mercury

25 / 25

Metal that can be cut by knife

mercury

sodium

Iron

silver

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CBSE Class X – Science Chemistry Exam (Full Syllabus)

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