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ICSE CLASS 7 CHEMISTRY SAMPLE PAPER - 2

ICSE Board

Class 7th Chemistry

Sample Paper 2

 

Time: 2 Hrs                                                                                                                     Total Marks: 75 

 

General Instructions

  • All questions are compulsory.
  • Questions 1 carry one mark each.
  • Questions in 2 A and B carries 5 marks each.
  • Questions in 3 A and B carries 5 marks each.
  • Questions in 5 A and B carries 5 marks each.
  • Questions in 6 A and B carries 5 marks each.
  • Question 7 A carry 7 marks and 7 B carry 3 marks.

 

Q. No.

Question

Marks

Ques 1.

Choose the correct answer out of the four available choices given under each question.

15

1.

Petroleum is refined using

(a) Filtration

(b) Sedimentation

(c) Distillation

(d) Evaporation

 

2.

The symbol of mercury is

(a) $\mathrm{Me}$

(b) $\mathrm{Hg}$

(c) $\mathrm{Mg}$

(d) $\mathrm{He}$

 

3.

The molecular formula of hydrogen is

(a) $\mathrm{H}_{1}$

(b) $\mathrm{H}_{2}$

(c) $\mathrm{H}_{3}$

(d) $\mathrm{H}_{4}$

 

4.

The process by which oxidation of food in our body take place is

(a) Photosynthesis

(b) Respiration

(c) Decomposition

(d) Combustion

 

5.

are used for dyeing and coloring clothes.

(a) Animal extracts

(b) Plant extracts

(c) Fossil fuels

(d) Salts

 

6.

An evaporating dish is made of

(a) Porcelain

(b) Steel

(c) Aluminum

(d) Wood

 

7.

Bronze is an alloy of

(a) Copper and tin

(b) Copper and silver

(c) Copper and nickel

(d) Copper and aluminum

 

8.

Which of the following is volatile in nature?

(a) Common salt

(b) Petrol

(c) Water

(d) Milk

 

9.

Burning of fuels releases in the atmosphere.

(a) Carbon dioxide and water vapour

(b) Oxygen and water vapour

(c) Sulphur dioxide and water vapour

(d) Carbon monoxide and water vapour

 

10.

Balancing chemical equation is based on

(a) Law of conservation of mass

(b) Mass of reactant and product

(c) Symbols and formulae

(d) None of the above

 

11.

Nuts contain

(a) Carbohydrates

(b) Proteins

(c) Fats

(d) Methane

 

12.

is hydrated calcium sulphate.

(a) Marble

(b) Talc

(c) Gypsum

(d) Coal

 

13.

Which of the following involves a change from the solid state directly to the gaseous state?

(a) Evaporation

(b) Sublimation

(c) Condensation

(d) Solidification

 

14.

A fuel when used releases least amount of pollutants in the air.

(a) Sulphur dioxide

(b) Chlorofluorocarbon

(c) Smoke

(d) CNG

 

15.

Which of the following is used in advertising signboards?

(a) Argon

(b) Krypton

(c) Xenon

(d) Helium

 

Ques 2.

  

A.

Give a scientific word for the following:

5

1.

An alloy of copper, tin, and zinc.

 

2.

A substance made by fusing sand, soda, and gravel.

 

3.

A substance used to speed up or slow down the chemical reactions without taking part in

the reaction.

 

4.

Molecules of an element containing three atoms of the same type.

 

5.

A gas liberated when dilute acids react with metals.

 

B.

Fill in the blanks and rewrite the sentences:

5

1.

______is used in observation balloons.

 

2.

______is used to prepare solutions for medicinal purposes, laboratories, and car

batteries.

 

3.

Plaster of Paris is______

 

4.

Latin name for copper is______

 

5.

Oxygen occupies about______ of air by volume.

 

Ques 3.

  

A.

Match the item in Column A with the appropriate item in Column B.

Column A

Column B

Global warming

Hydrated ferric oxide

Acid rain

Manganese oxide

Rust

Carbon dioxide

Catalyst

Ozone

Photosynthesis

Nitrogen dioxide

5

B.

Give uses of following inert gases

5

1.

Neon

 

2.

Radon

 

3.

Xenon and Kryptons

 

4.

Helium

 

5.

Argon

 

Ques 4.

 

5

A.

Classify the following elements as metals, non-metals and metalloids

Silicon

 

Sulphur

 

Platinum

 

Hydrogen

 

Copper

 
 

B.

Define the following:

5

1.

Nitrogen fixation

 

2.

Atomicity

 

3.

Polyatomic molecules

 

4.

Homogeneous mixtures

 

5.

Rusting of iron

 

Ques 5.

  

A.

Give the chemical formulae for the following:

5

1.

Sulphuric acid

 

2.

Aluminium sulphate

 

3.

Magnesium oxide

 

4.

Hydrochloric acid

 

5.

Potassium hydroxide

 

B.

State five characteristics of chemical reactions

5

Ques 6.

  

A.

State whether True or False

5

1.

No new substance is formed during chemical change.

 

2.

Sulphuric acid is a weak acid.

 

3.

Black residue is formed when sugar is heated.

 

4.

A conical flask is used for storing and mixing liquids

 

5.

Milk is a mixture.

 

B.

Match the apparatus with its correct use.

Bunsen burner

Mixing and storing gases

Thistle funnel

Heating purposes

Wire gauze

Measuring liquids

Measuring cylinder

Transferring liquids

Conical flask

Preventing cracking of a glass apparatus during heating

5

Ques 7. 

  

A.

  

1.

Distinguish between physical and chemical changes.

3

2.

Distinguish between metal and non-metal

4

B.

Distinguish between pure substance and mixture.

3

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