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

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

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

chemical

physical

Both 1 & 2

none of these

3 / 25

State the reactions are exothermic or endothermic in nature: Decomposition of ferrous sulphate

endothermic reaction

exothermic reaction

Both 1 & 2

all of these

4 / 25

Which of the subsequent does show an oxidation reaction

Gain of oxygen

Loss of oxygen

Gain of hydrogen

None of the above

5 / 25

Three beakers labelled as A, B and C, each containing 25 ml of water, were taken. A small amount of NaOH, anhydrous CuSO4 and NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B, whereas in the case of beaker C, the temperature of the solution fell. Which one of the following statement(s) is (are) correct?

In beakers A and B, exothermic process has occurred.

In beakers A and B, endothermic process has occurred

In beaker C, exothermic process has occurred

In beaker C, endothermic process has occurred.

1

2

1 and 4

2 and 3

6 / 25

Which of the consequent will turn phenolphthalein pink?

NaOH(aq)

HCl(aq)

CH₃COOH(aq)

H₂O

7 / 25

The chemical formula for plaster of Paris is :

CaSO₄.2H₂O

CaSO₄.H₂O

CaSO₄. 1/2H₂O

2CaSO₄.H₂O

8 / 25

Which of the subsequent phenomena occur, when a slight amount of acid is added to water?

It turns lime water milky

It extinguishes a burning splinter.

It dissolves in a solution of sodium hydroxide.

It has a pungent odour

1 and 3

1 and 2

2 and 3

2 and 4

9 / 25

Sodium hydrogen carbonate when added to acetic acid evolves a gas. Which of the following declaration are true about the gas evolved?

It turns lime water milky

It extinguishes a burning splinter.

It dissolves in a solution of sodium hydroxide.

It has a pungent odour

1,2 and 3

1 and 2

1 and 4

2, 3 and 4

10 / 25

Washing soda is prepared from

sodium chloride

sodium carbonate

sodium hydroxide

sodium nitrate

11 / 25

Which of the following declaration about the modern periodic table is accurate?

It has 18 horizontal rows known as periods.

It has 7 vertical columns rows known as periods

It has 18 vertical columns known as groups.

It has 7 horizontal rows known as groups.

12 / 25

Which of the following affirmation about the modern periodic table are inappropriate?

The elements in the modern periodic table are arranged on the basis of their decreasing atomic numbers

The elements in the modern periodic table are arranged on the basis of their increasing atomic masses.

Isotopes are placed in adjoining group(s) in the periodic table.

The elements in the modern periodic table are arranged on the basis of their increasing atomic number

1,2 and 3

1 and 2

2 and 3

3

13 / 25

Which of the following elements does not lose an electron with ease?

Na

F

Mg

Al

14 / 25

The valency of an element vary across a period

increases

Decreases

Remains constant

increases/decreases

15 / 25

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

F < C < O < Be < Li

F < O < C < Be < Li

Li < Be < C < O < F

Li < Be < C < F < O

16 / 25

A molecule of ammonia (NH₃) has:

Only single bonds

Only double bonds

Only triple bonds

Two double bonds and one single bond

17 / 25

The I.U.P.A.C name of CH₃CH₂CH=CH₂ is?

3-Butene

Prop-1-ene

But-1-ene

Butyne

18 / 25

Cation is formed when:

Atom gains electrons

Atom loses electrons

Proton is lost by the atom

Atom shares electrons

19 / 25

The strong electrostatic interactions between ions formed by the transfer of electrons

covalent compounds

ionic compounds

both 1 & 2

none

20 / 25

UnSaturated hydrocarbons contains

double/triple covalent bonds

single covalent bonds

four covalent bonds

five covalent bonds

21 / 25

Which of the following Metal have very low melting points?

Gallium

titanium

uranium

copper

22 / 25

The metals that float when dealt with water are:

Manganese and sodium

Manganesium and sodium

sodium and calcium

Magnesium and Calcium

23 / 25

The poorest conductor of heat among metals is

Lead

Mercury

Calcium

Sodium

24 / 25

which metal is more reactive?

calcium

sodium

both 1 & 2

none of these

25 / 25

Which metal is less reactive?

calcium

sodium

both 1 & 2

none of these

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CBSE Class X – Science Chemistry Exam (Full Syllabus)

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