Chemistry Olympiad 6 & 7

Integrated Preparation Along with School

CAREER POINT PRE FOUNDATION DIVISION SUMMER WORKSHOP (OLYMPIAD) CLASS-6th & 7th Daily Practice Problem Sheet Subject : Chemistry

Topic : Matter

DPPS. NO. – 01 .

OBJECTIVE TYPE QUESTIONS : Q.1

A pure substance that cannot be broken down into other substances by chemical or physical means is a(n) – (A) Element (B) Substance (C) Mixture (D) Compound

Q.2

The process of conversion of solid into gaseous form directly is known as (A) Condensation (B) Freezing (C) Sublimation (D) Vaporization

Q.3

No. of free surfaces is maximum in (A) liquid (C) gas

(B) solid (D) All have equal no. of free surfaces

Q.4

A substance in which two or more elements are chemically combined is called a(n) (A) substance (B) element (C) compound (D) mixture

Q.5

Two or more substances that are mixed together, but do not chemically combine, form a(n) (A) substance (B) element (C) mixture (D) compound

Q.6

The particles in a solid move in which way ? (A) they vibrate in their own place (C) they move in circular manner

(B) they move around one another freely (D) they do not move at all

What is the building block of matter? (A) cell (B) molecule

(C) element

(D) atom

The following that sublimes on heating is (A) Ice (B) Water vapours

(C) Water

(D) Dry Ice

Q.7

Q.8

Q.9

A salad would be considered which type of mixture? (A) heterogeneous (B) homogeneous (C) element

(D) compound

Q.10

Matter is anything that has mass and takes up space and offers................... . (A) heat (B) gravity (C) frictional force (D) resistance

Q.11

The normal atmospheric pressure is (A) 1 atmosphere (B) 1.01 × 10 Pa

Q.12

(C) 1 bar

(D) 1 torr

Which of the following is not a physical property of a liquid? (A) It is able to flow (B) It can't be compressed (C) It has a fixed volume (D) It has a fixed shape

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Q.13

A teaspoon of sugar stirred into a glass of water would be considered which type of mixture? (A) Heterogeneous (B) Homogeneous (C) Compound (D) Element

Q.14

The force which cause 2 metal pieces to join in a long period of time, if kept side by side is (A) Cohesive force (B) Gravitational force (C) Adhesive force (D) None of these

Q.15

Which of these states of matter is found on stars? (A) Liquid substances boiling continuously (B) Extremely hot solids (C) Plasma (D) Bose-Einstein state

Q. 16

Iron nail doesn’t shatter into pieces on hammering unlike ice cube. This is because (A) cohesive force between particles of iron is greater than that of ice cube (B) adhesive force between particles of iron is greater than that of ice cube (C) Iron hammer cannot break another iron substance (D) Iron isn’t transparent like ice cube

Q.17

Water starts boiling at 20 minutes at hilltop. The amount of time it will take to boil on ground would be (A) > 20 min. (B) < 20 min. (C) = 20 min. (D) Depends upon surface area of the vessel

Q.18

The reason why graphite is used as lubricant is because (A) it is very soft and comes cheap (B) it is available in abundant amount (C) it’s occurs in layered structure (D) None of these

Q.19

Which can be used for superior finishing while cutting (A) Cast iron (B) Titanium (C) Diamond

Q.20

(D) Stainless Steel

Correct steps to separate iron fillings, sand and camphor is (A) melting  magnetic separation (B) Magnetic separation  sublimation (C) Condensation  magnetic separation (D) Magnetic separation condensation


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Topic : Physical & Chemical Changes

DPPS. NO. – 02 .


Q.2

Q.3

Q.4

Q.5

Q.6

A change in which there is no change in chemical properties is : (A) chemical change (B) biological change (C) nuclear change

(D) physical change

Chemical formula of Baking soda is : (A) Na2CO3 (B) CaCO3

(C) K2CO3

(D) NaHCO3

Rust chemically is : (A) Fe3O4 . 4H2O

(C) FeO

(D) Fe2O3 .xH2O

(B) Fe2O3

Photosynthesis is an example of is : (A) physical change (C) both

(B) chemical change (D) None

Burning of candle is an example of : (A) Physical change (B) chemical change

(C) both (A) and (B)

(D) None

Following is not a method to prevent rusting : (A) Galvanizing (B) Painting

(C) Greasing

(D) None

Q.7

Following is not an example of physical change : (A) Dissolving sugar in water (B) Formation of clouds (C) Both (A) and (B) (D) None

Q.8

Chemical formula of blue vitriol is : (A) CuSO4.7H2O

(B) CuSO4.3H2O

(C) CuSO4. 5H2O

(D) None

Chemically, blue vitriol is called : (A) copper sulphate (B) copper oxide

(C) copper hydroxide

Q.9

Q.10

Q.11

Rusting of iron takes place in the presence of moisture and : (A) oxygen (B) nitrogen (C) hydrogen The explosion of firework is a (A) displacement reaction (C) chemical change

(D) magnesium sulphate

(D) carbon

(B) physical change (D) slow change


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Q.12

The gas which turns lime water milky when it is passed through lime water is : (A) Carbon dioxide (B) Hydrogen (C) Oxygen (D) Nitrogen dioxide

Q.13

The process of depositing a layer of zinc on iron is known as : (A) galvanisation (B) crystallisation (C) rusting

(D) layering

Q.14

A film of brownish substance acquired on an iron piece, when kept in open for some time, is called : (A) galvanisation (B) rust (C) crystallisation (D) brown iron metal

Q.15

The gas which protects us from the ultraviolet rays is : (A) carbon monoxide (B) nitrogen. (C) oxygen

(D) ozone

Q.16

Stainless steel is manufactured by mixing iron with (A) chromium and carbon (B) aluminium and calcium (C) copper and zinc (D) zinc and magnesium

Q.17

New substances formed as a result of a chemical reaction are known as – (A) reactants (B) catalysts (C) ingredients

(D) products.

Q.18

When iron nail is added into blue coloured copper sulphate solution, it turns : (A) green (B) yellow (C) black (D) white

Q.19

The change that takes place within a short period of time is known as – (A) fast change (B) slow change (C) non-periodic change (D) periodic change

Q.20

The factor which speeds up the process of evaporation is : (A) increase in temperature (B) decrease in temperature (C) increase in humidity (D) decrease in wind speed


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Topic : Acids, Bases & Salts

DPPS. NO. – 03 .


Q.2

The taste of tartaric acid is : (A) bitter (B) sour

(C) sweet

(D) salty

A substance that can destroy a cloth or wood is : (A) acid (B) base

(C) baking soda

(D) alkaline

Q.3

An example of a base which is without a metal atom, is : (A) sodium hydroxide (B) ferric hydroxide (C) ammonium hydroxide (D) calcium hydroxide

Q.4

The base present in soap is : (A) Aluminium hydroxide (C) Magnesium hydroxide

(B) Sodium hydroxide (D) Calcium hydroxide

The sting of ant contains : (A) acetic acid (C) magnesium hydroxide

(B) formic acid (D) calcium carbonate

Milk of magnesia has : (A) sodium hydroxide (C) magnesium hydroxide

(B) calcium hydroxide (D) potassium hydroxide

Milk of magnesia is used as : (A) an acid (B) an antacid

(C) a pesticide

(D) a salt

Acids react with metals to produce : (A) nitrogen gas (B) carbon dioxide gas

(C) oxygen gas

(D) hydrogen gas

Q.5

Q.6

Q.7

Q.8

Q.9

To prepare a dilute solution of an acid, we should : (A) add acid to water slowly with constant stirring (B) add water to acid rapidly (C) never add acid to water (D) add water to acid slowly without stirring

Q.10

The indicator that changes basic solution to green is : (A) phenolphthalein (B) turmeric (C) methyl orange


(D) china rose Page # 1

Q.11

Q.12

An example of a synthetic indicator is : (A) methyl orange (C) china rose

(B) litmus (D) turmeric

The acid found in each cell of our body is : (A) hydrochloric acid (C) deoxyribonucleic acid

(B) carbonic acid (D) nitric acid

Q.13

Special type of substances are used to test whether the given substance is acidic or basic. These substances are known as: (A) Indicators (B) Testers (C) Analyzers (D) Observers

Q.14

Citrus fruits contain : (A) formic acid

Q.15

Q.16

(B) oxalic acid

(C) citric acid

The basicity of the sulphuric acid is (A) 1 (mono basic) (C) 3 (tri basic)

(B) 2 (di basic) (D) 4 (tetra basic)

Lactic acid is found in : (A) lemon (B) curd

(C) vinegar

(D) tartaric acid

(D) tamarind

Q.17

The effect of the sting can be neutralised by rubbing : (A) calamine solution (B) sulphuric acid (C) hydrochloric acid (D) sodium hydroxide

Q.18

Calamine solution is : (A) calcium carbonate (C) zinc carbonate

(B) sodium carbonate (D) magnesium carbonate

The chemical name of baking soda is : (A) sodium hydroxide (C) sodium hydrogencarbonate

(B) sodium carbonate (D) sodium oxide

An alkali is a/an : (A) acid

(C) base

Q.19

Q.20

(B) salt


(D) metallic oxide

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Topic : Fibre to Fabric

DPPS. NO. – 04 .


Q.2

Q.3

Q.4

Q.5

Q.6

Q.7

Q.8

Q.9

Q.10

Q.11

Process of removing wool from a sheep is called : (A) Weaving (B) Shearing (C) Spinning

(D) Ginning

Silk is obtained from : (A) larva of silkworm

(D) all the stages of

(B) eggs of silkworm

(C) adult silkworm

A rare and expensive fibre called cashmere is obtained from : (A) sheep (B) camel (C) rabbit

(D) goat

A good quality of wool is : (A) Lohi (B) Bakharwal

(D) Patanwadi

(C) Rampur bushair

The complex compounds that make animal fibres are : (A) fats. (B) cabohydrates (C) proteins

(D) minerals

Mohair wool is obtained from : (A) Yak (B) Angora rabbit

(C) Angora goat

(D) Camel

Yak wool is popular in : (A) Kerela (B) Uttar Pradesh

(C) Madhya Pradesh

(D) Ladakh

Alpaca and Llama are found in : (A) China (B) South America

(C) South Africa

(D) India

The workers employed in silk industry are affected by : (A) asthma (B) malaria (C) cholera Sorter’s disease is caused due to (A) Anopheles mosquito. (C) Anthrax.

(B) Plasmodium vivax (D) H1N1

Moonga is the strongest variety of(A) cotton (B) wool

(C) silk

(D) sorter’s disease

(D) synthetic fibre

Q.12

The time period taken by a silkworm to increase in size and spin its cocoon is : (A) 3 weeks (B) 4 weeks (C) 5 weeks (D) 6 weeks

Q.13

Silkworms are : (A) caterpillars of the silk moth. (C) cocoons of the silk moth.

(B) pupa of the silk moth. (D) eggs of the silk moth.


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Q.14

Q.15

Q.16

Q.17

Q.18

The process that undergoes after sorting is : (A) shearing (B) rearing

(C) scouring

(D) carding

Rearing of silk worm is called : (A) weaving (B) spinning

(C) ginning

(D) sericulture

Silk is a : (A) staple fibre

(C) rough fibre

(D) plant fibre

(B) filament fibre

A fibre which is lustrous in appearance is : (A) coir (B) cotton

(C) silk

Sorting of wool is associated with : (A) rearing the wool from sheep (C) steaming the silk moth

(B) separation of different textures (D) steaming the cocoon

Q.19

In the life cycle of silkworm, the earliest stage is : (A) cocoon (B) caterpillar (C) cocoon with developing moth (D) adult

Q.20

Boiling of cocoons to obtain silk fibres is known as : (A) shearing (B) rearing (C) reeling


(D) wool

(D) incubation

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CAREER POINT PRE FOUNDATION DIVISION SUMMER WORKSHOP (OLYMPIAD) CLASS-6th & 7th Daily Practice Problem Sheet

CHEMISTRY ANSWER KEY DPP-1 : Matter Q.No

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Ans.

A

C

B

C

C

A

D

D

A

D

A

D

B

C

C

A

A

C

C

B

DPP-2 : Physical & Chemical Changes Q.No

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Ans.

D

D

D

B

C

D

D

C

A

A

C

A

A

B

D

A

D

A

A

A

DPP-3 : Acids, Bases & Salts Q.No

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Ans.

B

A

C

B

B

C

B

D

A

D

A

C

A

C

B

B

A

C

C

C

DPP-4 : Fibre to Fabric Q.No

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Ans.

B

A

D

A

C

C

D

B

D

C

C

D

A

D

D

B

C

B

B

C


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Chemistry Olympiad 6 & 7

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