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Dr. Homi Bhabha Competition Test Se

Exam Code : R2Subject : Physics ,Chemistry, Biology

Marks : 100

Time : 90 min.

Answer Paper

P2 1 Fluid friction is friction exerted by 2

(1) Solid and liquid

(2) Liquid and gas

(3) Solid and gas

(4) Solid ,liquid and liquid

P2 2 Fluid force is also called 2

(1) Pressure

(2) Drag

(3) Speed

(4) Velocity

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P2 3 Which is a contact force 4

(1) Gravitational

(2) Electrostatic force(3) Magnetic force

(4) Sliding force

P2 4 The Earth revolve around sun due to 1

(1) Gravitational force

(2) Magnetic force

(3) Mechanical force

(4) Electro static force

P2 5 Which of the following is an Oscillatory Motion? 1

(1) Flapping of birds wing

(2) Cycle

(3) Hour hand

(4) none of above

P2 6When the passenger moving in a bus , the road side trees

appear to be moving1

(1) Backward

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(2) Forward

(3) Same speed

(4) None of above

P2 7 In uniform motion the object cover's 1

(1) Equal distance

(2) unequal distance

(3) Both 1 and 2

(4) Can 't say

P2 8A force that one surface exerts on another surface when the

two rub against each other is called4

(1) gravity

(2) acceleration

(3) inertia

(4) friction

P2 9 An example of a balanced force is 2

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(1) A car sliding on ice.

(2) A tug-of-war game in which one wins.

(3) A car hitting a telephone pole.

(4) A roller coaster going down the first drop.

P2 10 In physical science, a push or pull is called 2

(1) Gravity

(2) Force

(3) Universal law

(4) Inertia

P2 11When two equal forces act on the same object, in opposite

direction the net force is3

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(1) Crazy

(2) Greater than either force

(3) Zero

(4) Smaller than either force

P2 12 What is the definition of weight? 1

(1) A gravitational force on a mass.

(2) How big an object is.

(3) The amount of matter in an object.

(4) The amount of space an object takes up.

P2 13An athlete can run 200 m in 25 seconds. What is her average

speed?2

(1) 50 m/s

(2) 8 m/s

(3) 225 m/s

(4) 0.125 m/s

P2 14A car travels 120 kilometers in 45 minutes. What is its

average speed?1

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(1) 160 km/h

(2) 90 km/h

(3) 120 km/h

(4) 2.67 km/h

P2 15An aircraft travelling at 800 km/h takes 4 hours to make a

journey. How much distance it travelled?1

(1) 3,200 km

(2) 800 km

(3) 200 km

(4) 4,000 km

P2 16A truck has an average speed of 80 km/h. How far will it

travel in 4 hours ?4

(1) 84 km

(2) 5 km

(3) 20 km

(4) 320 km

P2 17When crystal's of potassium permanganate are dropped in

water, we see their molecules in motion. This motion is2

(1) Oscillatory

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(2) Random

(3) Periodic

(4) Linear

P2 18 How long will it take an athlete whose average speed. is 7.5m/s to run 1500 meters?

3

(1) 1507.5 seconds

(2) 100 seconds

(3) 200 seconds

(4) 500 seconds

P2 19 Usain Bolt set a new world record for the 100 meters racewith a time of 9.58 seconds. Find average speed?

3

(1) 109.58 m/s

(2) 0.0958 m/s

(3) 10.40 m/s

(4) 20 m/s

P2 20 Which one of the following is not a unit of speed? 4

(1) km/h

(2) m/s

(3) miles per hour

(4) m/s2

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P2 21Cyclist moves 20 meters along a track in 4 seconds. What is

his speed?4

(1) 10 m/s

(2) 40 m/s(3) 80 m/s

(4) 5 m/s

P2 22 Which statement is not true regarding force 3

(1) Force is push or pull on a object

(2) Force can change shape of a object

(3) Force can not change direction of moving object

(4) Force can set object in motion

P2 23 Find odd one out 3

(1) Motion of bee

(2) Motion of fly

(3) Motion of plucked string of sitar

(4) Motion of ball in football game

P2 24 State why tyres have grooves on their surface? 3

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(1) To increase the speed

(2) To reduce the friction

(3) To increase the friction

(4) To avoid bursting of tyres

P2 25

If a body moves in circular path around a fixed axis then it is

said to be in circular motion. If body moves round without

change in its position then is said to be rotational

2

(1) Both statements are false

(2) Both statements are true

(3) Statement first is true but statement second is false(4) Statement first is false but statement second is true

P2 26 Which motion does the wheel of a cycle show? 2

(1) Translatory

(2) Circular

(3) Vibrational

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(4) None of above

P1 27 To measure thickness of wire accurately we use 3

(1) Scale

(2) Tape

(3) Vernier caliper

(4) All of above

P1 28 Choose the odd one out 3

(1) Meter

(2) Kilometer

(3) Kilogram

(4) Centimeter

P1 29 One ream is equal to 2

(1) 20 dozen

(2) 40 dozen

(3) 12 dozen

(4) 100 dozen

4


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(1) Distance

(2) Mass

(3) Weight

(4) kg1

P1 31 Capacity is 1

(1) Volume of liquid a vessel can hold

(2) Area of container

(3) Height and width of container

(4) All of above

P1 32 Which is the unit of temperature 4

(1) degree Celsius

(2) Kelvin

(3) Fahrenheit

(4) All of above

4


(1) Square centimeter

(2) Square meter

(3) Hectare

(4) Cubic centimeter

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P1 34 1 Hectare is equal to 2

(1) 10 acre

(2) 100 acre(3) 1000 acre

(4) e of above

P1 35 1 quintal is equal to 2

(1) 1/100 metric ton

(2) 1/10 ton

(3) 1/1000 metric ton(4) None of these

P1 36 With Vernier caliper we can measure up to 1

(1) 1/100 cm

(2) 1/10 cm

(3) 1/1000 cm

(4) None of these

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C2 37

Which of the following method is used to separate the

components of the mixture of common salt and saw dust? 4

(1) Filtration and Distillation

(2) Filtration and Decantation

(3) Decantation and Filtration

(4) Filtration and Vaporization

C2 38 When is the centrifugal method of separation used? 1

(1) Particles of solid are spread uniformly in a liquid

(2) Mixing of two immiscible liquids

(3) Dissolved solid particles are in liquid

(4) Light particles of solid are present in liquid

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C2 39Naphtha balls kept in open in a cupboard disappear due to

which of the following process?1

(1) Sublimation

(2) Distillation

(3) Centrifugation

(4) Separation

C2 40 Lemon Juice and sugar are 2

(1) Mixture and mixture respectively

(2) Mixture and compound respectively

(3) Compound and element respectively

(4) Compound and mixture respectively

C2 41If we heat a little sugar in a spoon for a long lime, what shall

we find?3

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(1) Sugar melts leaving a brown molten mass

(2) Sugar turns brownish

(3) A black mass are left behind

(4) Sugar sublimates leaving some white traces

C2 42 Loading is a process by which 2

(1) Soluble particles are made heavier

(2) Insoluble particles are made heavier

(3) Soluble particles are made lighter(4) Insoluble particle are made lighter

C2 43 Separating funnel is used to separate 2

(1) Two miscible liquid

(2) Two immiscible liquid

(3) Insoluble solid and liquid

(4) Soluble solid and liquid

C2 44 Sublimation is a process of 3

(1) Changing from solid to liquid

(2) Changing from gas to liquid

(3) Changing from solid to gas

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(4) Changing of liquid to gas

C2 45 Pure substance can be determined by 4

(1) Melting Point

(2) Boiling Point

(3) Specific gravity(4) All of above

C2 46 Find odd one out 4

(1) Threshing

(2) Winnowing

(3) Sieving

(4) Filtering

C2 47 Winnowing is based on which principle 3

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(1) Size of particle

(2) Color of particle

(3) Weight of particle

(4) none of above

C2 48 Sieving is based on which principle 1

(1) Difference in size of particle

(2) Difference in weight of particle

(3) Difference in color of particle

(4) Solubility of substance

C2 49 For a water filter what will be the serial order of 1

(1) Fine sand, crushed charcoal, coarse sand

(2) Crushed charcoal, fine sand, coarse sand

(3) Coarse sand, fine sand, charcoal

(4) Coarse sand, charcoal

C2 50 Which is not a sublimate substance? 4

(1) Iodine

(2) Sal Ammonia

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(3) Naphthalene

(4) Alum

C2 51 Which is not a magnetic substance? 4

(1) Iron

(2) Cobalt

(3) Nickel

(4) Copper

C2 52 Centrifugation is based on which principle 2

(1) Difference in size(2) Difference in density

(3) Difference in color

(4) Difference in mass

C2 53 Distillation is a process in which 1

(1) Evaporation is followed by condensation

(2) Condensation is followed by evaporation

(3) Evaporation followed by crystallization

(4) Condensation followed by crystallization

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C2 54 In which country sea water is distilled to get drinking water 3

(1) India

(2) America

(3) Kuwait

(4) Russia

C2 55 Mixture of iron and sulphur is separated by 1

(1) Magnetic separation

(2) Crystallization

(3) Condensation

(4) Sublimation

C2 56 Separation of liquid after sedimentation is done by 2

(1) Centrifugation

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(2) Decantation

(3) Loading

(4) Evaporation

C2 57 Which is a heterogeneous mixture 4

(1) A solution of sugar in water

(2) A Solution of salt in water

(3) Air

(4) Iron nail and water

C2 58At construction site pebbles and stones are separated from

sand by2

(1) Hand Picking

(2) Sieving

(3) Filtering

(4) Sedimentation

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C2 59Which of the following are homogeneous in nature?

(1)Salted water (2) wood (3) soil (4) air3

(1) (1) and (3)

(2) (2) and (4)

(3) (1) and (4)

(4) (3) and (4)

C2 60 What does the term 'solute' means? 4

(1) The liquid that is collected at the end of distillation

(2) The liquid that evaporates from a solution

(3) Solid particles that are left behind after filtration on the

filter paper

(4) Solid particles that are left behind after evaporation

C2 61 What does the term 'filtrate' means? 3

(1) Solid particles that are left behind after filtration on the

filter paper

(2) Solid particles that decompose upon heating

(3) The liquid that passes through the filter paper

(4) The liquid that evaporates from a solution

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C2 62Two or more substances mingled together without any

chemical reaction is called,1

(1) Mixture(2) Solution

(3) Residue

(4) Distillate

C2 63Water and alcohol are easily separated by distillation because

of their4

(1) different melting points

(2) different densities

(3) different colours

(4) different boiling points

C2 64 Which one of the following is not a mixture? 4

(1) paint

(2) crude oil

(3) air

(4) sugar

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C2 65Miscible liquids that have different boiling points can be

separated by3

(1) filtration

(2) chromatography(3) distillation

(4) decanting

C2 66 Which one of the following solids is immiscible in water? 4

(1) sugar(2) salt

(3) copper sulfate

(4) sand

C2 67 Air is a mixture of 4

(1) liquids and gases

(2) solids

(3) liquids

(4) gases

C2 68Which one of the following is not an example of a separation

technique?2

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(1) tea strainer

(2) boiled egg

(3) fishing net

(4) surgical mask

C2 69 Which one of the following substances is a mixture? 1

(1) seawater

(2) water

(3) copper

(4) salt

C2 70 Oil and water may be separated by using 2

(1) a condenser

(2) a separating funnel

(3) a filter funnel

(4) chromatography paper

C2 71Which separation technique do you use to separate a

magnetic substance from a non magnetic substance?2

(1) evaporation

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(2) magnetic attraction

(3) chromatography

(4) filtration

C2 72In the process of evaporation, which one of the following

pieces of laboratory apparatus would not be used?4

(1) wire gauze

(2) bunsen burner(3) evaporating basin

(4) filter funnel

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C2 73 Liquids that do mix are said to be 3

(1) miscible

(2) soluble

(3) immiscible

(4) flammable

C2 74Which of the following processes is used to separate butter

from butter milk?3

(1) Evaporation

(2) Distillation

(3) Centrifugation

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(4) Condensation

C2 75Which of the following methods is used to separate Iodine

and -sand?4

(1) Filtration.

(2) Distillation

(3) Sedimentation

(4) Sublimation

C2 76What is the common method used to separate sand from

water most quickly and cheaply?

4

(1) Centrifugation

(2) Distillation

(3) Decantation

(4) Filtration

C2 77

Which is the process that causes water to collect on glass

windows in cold weather? 1

(1) Condensation

(2) Distillation

(3) Evaporation

(4) Filtration

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C2 78

The separation technique that involves heating a solution

until the liquid changes into a gaseous state, leaving behind a

solid is known as

1

(1) evaporation

(2) decanting

(3) sterilization

(4) chromatography

C2 79 What is meant by term "sublimation'? 1

(1) Change from the solid state straight into the gaseous statewithout passing through liquid slate

(2) The melting of solid

(3) The vaporization of the liquid

(4) The condensation of a gas into a liquid

C2 80

In the lab, a scientist accidentally dropped a ball bearing into

a beaker of hot water and wanted to get it out as soon aspossible as the hot water will be used in an experiment.

3

(1) Use distillation to isolate the hot water.

(2) Use paper chromatography

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(3) Use a magnet to attract the ball bearing and get it out of

the beaker

(4) Evaporate the hot water to get the ball bearing

C2 81

Which of the following techniques may be used to separate

an insoluble solid from a liquid solution. (i) decanting ( ii)

chromatography (iii) filtration (iv) Loading

3

(1) i and iv

(2) ii and iii

(3) i and iii

(4) iii and iv

B2 82 O.R.S is prepared 1

(1) 1 liter of boil water + 8 teaspoon of sugar + teaspoon

salt

(2) 1 glass of water + 4 teaspoon of sugar + pinch of salt

(3) 1 glass of water + 2 teaspoon of sugar + pinch of salt

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(4) 1 liter of water + 8 tablespoon of Sugar + tablespoon

salt

C1 83 Which one is not a physical change? 3

(1) Melting

(2) Boiling

(3) Combustion

(4) Evaporation

C1 84Evaporation and condensation are opposite actions while

melting and freezing are similar actions.3

(1) Both statements are true

(2) Both statements are false

(3) Statement 1 is true while statement 2 is false

(4) Statement 1 is false while statement 2 is true

C1 85 Salt pan is 2

(1) slow ,physical,irrreversible change

(2) slow ,physical, reversible change

(3) fast ,physical, reversible change

(4) fast ,chemical,irrreversible change

B2 86 Disease causing micro-organisms are called 3

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(1) Bad micro-organism

(2) Disease spread micro-organism

(3) Pathogen

(4) Micro-bacteria

B2 87 Epidemic of the disease is called when 1

(1) Many people getting same disease at same time

(2) Many people getting different disease

(3) Repetition of disease

(4) Few people getting multiple diseases

B2 88 Infection disease can be spread through 4

(1) Air

(2) Water

(3) Touch

(4) All of above

B2 89 Which of the following organ is affected in jaundice? 1

(1) Liver

(2) Heart

(3) Lungs

(4) Intestine

B2 90 Who invented the vaccine for small pox? 4

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(1) Fleming

(2) Edison

(3) Pasture

(4) Jenner

B2 91 The disease of throat is 2

(1) Tuberculosis

(2) Diphtheria

(3) Jaundice

(4) Typhoid

B2 92 Which is skin disease? 1

(1) Scabies

(2) Diphtheria

(3) Jaundice

(4) Typhoid

B2 93 Vaccination is given 2

(1) To kill the germs

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(2) Enable the body to fight the disease

(3) Protecting body from entering germs

(4) All of above

B2 94 Which vaccination is given to a new born baby? 2

(1) Triple

(2) B.C.G

(3) Polio

(4) Tetanus

B2 95 Which vaccination is given orally? 3

(1) B.C.G

(2) Triple

(3) Polio

(4) Cough and cold

B2 96 The official information about vaccination is given by 3

(1) Hospitals

(2) Municipality

(3) Public health department

(4) Government of India

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B2 97 First Aid is called 1

(1) Immediate treatment given before any medical help arrive

(2) First person to treat the injured

(3) When doctor hear the case history

(4) Informing Police

B2 98 Fracture indicates 1

(1) Broken bone

(2) Bending of bone(3) Vitamin deficiency

(4) Growth of bone is not proper

B2 99 Scalding cause due to 1

(1) Contact with hot water

(2) Contact with fire

(3) Contact with sharp instrument

(4) Biting of insects

B2 100 Firemen wear cloths made up of 3

(1) Cotton fiber and fire proof substance

(2) Outer coating of metal

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(3) Both a and b

(4) None of these

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ies. STD 6

1. Wrong. Solid in not a fluid

2. Right. Fluid indicates flow. Liquid and gas

both are fluid

3. Wrong

4. Wrong

1. Wrong :

2. Right. Drag is fluid force

3. Wrong

4. Wrong

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1. here is no contact

2. here is no contact

3. Wrong : There is no contact

4. Right : There is a contact between 2 sliding

parts

Fact

1. Right

2. Wrong3. Wrong

4. Wrong

1. Right. To and fro movements

2. Wrong.

3. Wrong4. Wrong

The motion is relative

1. Right

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2. Wrong

3. Wrong

4. Wrong

As the object covers equal distances in equal

intervals of time, it is said to be in uniform

motion

1.Right Uniform distance is specific distance in

specific time

2. Wrong

3. Wrong

4. Wrong

1. Wrong

2. Wrong

3. Wrong

4. Right :

Because the force that each side exerting is

equal, the two forces cancel each other out

and the resulting force is zero. Therefore,

there is no change in motion.

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1. Wrong : Unbalanced force as there is very

less force opposite car sliding on ice.

2.Right :

3. Wrong : It is a unbalanced force as theforce of car are telephone pole is different

4. Wrong : Unbalanced force as there is very

less force opposite roller coaster going down

1. Wrong . It is Earths Pull

2. Right : Definition of force

3. Wrong

4. Wrong

Forces occur in pairs and can be either

balanced or unbalanced. Balanced forces donot cause a change in motion. They are equal

in size and opposite in direction. Because the

force that each of you is exerting is equal, the

two forces cancel each other out and the

resulting force is zero. Therefore, there is no

change in motion.

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1. Wrong : .

2. Wrong :

3. Right

4. Wrong :

1. Right. Definition of weight

2. Definition is related with size

3. Wrong : Definition is related with amount

of matter

4. Wrong : Definition is related with amountof space occupied

Speed=Distance/time 200/25=8

1. Wrong calculation

2. Right. Speed = Distance /Time

3. Wrong calculation4. Wrong calculation

Speed=Distance/time

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1. Right : . 120 km in 45 min. so in 60 min. 160

km




Distance=speed * time

1 Right : 800 *4 = 3200 km

2 Wrong calculation



Distance=speed * time




4. Right : . 80*4 =320 km

1. Wrong

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2. Right :

3. Wrong

4. Wrong

Time=Distance/Speed

1.Wrong calculation


3. Right 1500/7.5


Speed=Distance/time

1.Wrong calculation

2.Wrong calculation

3.Right : . 100/9.58

4.Wrong calculation

1. Wrong: . Distance/Time

2. Wrong : Distance /Time

3. Wrong: Distance /Time

4. Right : . Wrong unit of speed

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4. Right : . Right calculation

1. Wrong. correct statement

2. Wrong. Correct statement

3. Right. Wrong statement. Force can changedirection of moving object

4. Wrong. correct statement

1. Wrong. Random motion

2. Wrong. Random motion

3. Right : Vibration motion4. Wrong. Random motion

Grooves are used to bring down the speed of

car and also helps to stop the car.

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1. Wrong.

2. Wrong

3. Right

4. Wrong

1. Wrong

2. Right

3. Wrong4. Wrong

Satellites orbiting our Earth -- artificial

satellites or our Moon have circular motion.

The planets that orbit our Sun have Circular

motions. Playground merry go round is

another example of circular motion

1. Wrong : .

2. Right : Since the cycle wheel circulates in a

fixed axis it is circular

3. Wrong : There is no continuous vibration

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4. Wrong :

1. Wrong with scale we can measure up to 1

mm

2. Wrong with tape we can measure up to 1

cm

3. Right with Vernier caliper we can measure

up to 0.1 mm

4. Wrong

1. Wrong : Unit of length


3. Right : Unit of mass



2. Right calculation . 1 Ream =480 pages



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1. Wrong. It is quantity

2. Wrong It is quantity

3. Wrong It is quantity

4. Right. It is unit of mass

Capacity is liquid hold by container. And

Volume is space occupied by container

1. Right Definition

2. Wrong

3. Wrong

4 Wrong

1. Right

2. Right

3. Right

4. Right.

1. Wrong. Unit of area

2. Wrong Unit of area

3. Wrong Unit of area

4. Right Unit of volume

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Fact

1. Wrong conversion

2. Right

3. Wrong conversion

4. Wrong

1. Wrong conversion

2. Right

3 Wrong conversion4. Wrong

1. Right 0.1 mm =1/100 cm

2. Wrong conversion

3. Wrong conversion

4. Wrong

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Add the mixture of sawdust, sand and salt to

water. The sawdust will float and can be

skimmed form the surface. The salt will

dissolve in the water. The sand can be filtered

from the mixture which remains. The saltwater solution which remains can be heated

and the water will evaporate ( Vaporization)

leaving the salt behind.

1.Wrong : Distillation is for getting salt and

solvent . We do not want solvent

2. Wrong : . In decantation saw dust willnot settle at bottom

3. Wrong : Decantation will not useful

4. Right. Filtration will give saw dust and

vaporization will give back common salt.

1.Right. In Centrifugation principle is based

on suspended particles in liquid

2. Wrong : . Separating funnel is used

3.Wrong : . Evaporation is used

4. Wrong : . Filtration method is used

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Sublimation is a process of when a solid

changes to gas without entering liquid phase

1.Right : . Naphtha ball is a sublimating

substance

2. Wrong : liquid is needed

3. Wrong : . Liquid is needed

4.Wrong : . separation at least two substance

needed

1. Wrong : . Sugar is compound

2. Right. Mixture and compound

3. Wrong : . Lemmon juice is compound

,sugar is element

4. Wrong : . Lemmon juice is compound

,sugar is mixture

Sugar's composition is C12 H22 O11. Whenit's heated, it begins to melt, and it changes

it's composition while water and oxygen

escape, then it becomes pure carbon. That's

why it turns black.

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1. Wrong : If kept for a long time , carbon is

left behind

2.Wrong : .

3.Right : Black mass is carbon

4.Wrong : it is not sublimate substance

eg. when we add alum in water then light

particles become heavy and settle at bottom

1. Wrong

2. Right: Definition of loading

3. Wrong. Check definition of loading4. Wrong. Check definition of loading

1. Wrong. Distillation method

2. Right

3. Wrong. Filtration

4. Wrong: Distillation

1. Wrong: Melting

2. Wrong: Condensation

3. Right: Sublimation

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4. Wrong: Vaporization

Pure substances (unlike mixtures ) have

definite composition. This means that their

components are always the same and arealways combined in the same ratio by mass.

Because of this, they will always have a

constant melting point and boiling point

eg. Cu ,Al ,Fe

1. Right

2. Right

3. Right4. All 1,2,3 right.

1. Wrong : Based on separation of solid-solid



4. Right : Based on separation of solid-liquid

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1. Wrong : Sieving

2. Wrong : Hand Picking

3. Right Separate light material from heavy

material

4. Wrong : 3rd

option is right

1. Right. Difference in size of particle

2. Wrong : Winnowing

3. Wrong: Handpicking

4. Wrong : No relation with solubility ofsubstance

1. Right. i.e.. the method

2. Wrong Fine sand will be first in order

3. Charcoal will be second order

4. Fine sand has mentioned

Difference between sublimate and sublime

1. Wrong. Sublimate substance

2. Wrong. Sublimate substance

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3 Wrong . Sublimate substance

4. Right. sublimities substance

1. Wrong: Magnetic substance



4. Right: Non-magnetic substance

1. Wrong. Sieving2. Right. Centrifugation

3. Wrong. Hand Picking

4. Wrong. : Winnowing

1. Right

2. Wrong. First evaporation thencondensation

3. Wrong Second is condensation

4. Wrong. Crystallization is the part of

distillation process

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1. Wrong. In India we have enough pure

water supply

2. Wrong. In America they have enough pure

water supply

3. Right. Gulf countries they have less pure

water

4. Wrong. In Russia they have enough pure

water supply

1. Right: Iron is magnetic substance. so

Magnetic separation

2. Wrong : For Crystallization hot saturated

liquid is needed

3. Wrong: Condensation from gaseous to

liquid

4. Wrong: Sublimation is from solid to liquid

1. Wrong: Separation of minute light particle

from liquid

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2. Right. Definition of decantation

3. Wrong: Loading is a process in which solid

particles are made heavier

4. Wrong: From liquid to gas

1. Wrong: Homogenous : Mixed properly



4. Right: Heterogeneous. Can see both the

component

1. Wrong. Hand Picking method. cannot be

used at construction site2.Right.

3.Wrong : Filtering for Insoluble solid and

liquid substance

4. Wrong : There is no liquid for

sedimentation

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1. Wrong : . Homogeneous and

Heterogeneous

2.Wrong : Heterogeneous and

Heterogeneous

3.Right. Homogeneous and Homogeneous

4.Wrong: Heterogeneous and homogeneous

1.Wrong: It is called Solvent

2.Wrong: It is solvent in gaseous form

3.Wrong: Residue

4.Right: Solute

(1) Wrong: Residue

(2)Wrong: Solute

(3)Right: Filtrate

(4)Wrong: Solvent

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1.Right: Definition of Mixture

2.Wrong.

3.Wrong

4.Wrong

1. Wrong : They are separated by fractionaldistillation

2. Wrong : They are miscible

3. Wrong : color property is useful in case of

miscible liquid

4. Right : Fractional distillation principle is

based on different boiling point

1. Wrong : It is mixture



4. Right : It is compound

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1. Wrong : Solid and liquid

2.Wrong :

3.Right : having different boiling point liquid

separated by fractional distillation

4.Wrong :

1.Wrong : It is miscible/soluble2.Wrong : It is miscible/soluble

3.Wrong : It is miscible/soluble

4.Right : soluble/Immiscible

Air is a mixture of only gases

1. Wrong

2. Wrong3. Wrong

4. Right

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1.Wrong : . Filtration technique

2.Right : Not an example of any separation

technique

3.Wrong : . Filtration technique.

4.Wrong : . Filtration technique. (keeps away

bacteria from air)

1. Right : . It is mixture

2.Wrong : It is compound

3.Wrong : It is element

4.Wrong : It is compound

1. Wrong : . Condenser used for converting

gas to liquid

2. Right :

3. Wrong : It will filter both

4. Wrong :

1.Wrong: Not related with magnetic property

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2.Right : Magnetic substance can be

separated



1.Wrong : Wire gauze is used

2.Wrong :Bunsen burner is used

3.Wrong : Evaporating basin is used

4.Right : In evaporation filter funnel is not

needed

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If two liquids can mix completely when they

are combined in any proportion the liquids

are said to be miscible. Examples of miscible

liquids are ethanol (also called ethyl alcohol)

and water and also vinegar and water. If two

liquids do not mix, the liquid with the lower

density forms a layer on top of the liquid with

the greater density, and the liquids are said to

be immiscible. Oil and water are immiscible

liquids. The oil forms a layer on top of the

water. Other immiscible liquids are gasoline

and water and also oil and vinegar.

1. Wrong

2. Wrong: Solids said to be soluble

3. Right

4. Wrong : No relation with combustion

1. Wrong :

2. Wrong :

3. Right : . Lighter particles separated by

centrifugation

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4. Wrong :

1.Wrong : . Liquid is a part of mixture

2.Wrong : . Liquid is a part of mixture

3.Wrong: Liquid is a part of mixture

4.Right : Iodine is sublimative substance

1. Wrong

2. Wrong: Costly slow process

3. Wrong: slow process

4. Right :

1. Right : Converts vapour into liquid state

2. Wrong :

3. Wrong :

4. Wrong

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1. Right. Heating is done in evaporation

2.Wrong. No heating is done

3.Wrong.: No heating is done

4.Wrong.

1.Right : . Definition of Sublimation

2.Wrong : . Wrong. Defn

3.Wrong : Wrong defn

4.Wrong : Wrong defn

1. Wrong : It will take long time

2. Wrong : Not related with chromatography

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3. Right : Ball bearing magnetic substance,

Faster method

4. Wrong : It will take longer time also he will

loose hot water

1.Wrong: Loading is used to make solid

particle heavy

2.Wrong: Chromatography is a techniqueused to separate two miscible liquid dissolved

in same solution in a small quantity

3.Right

4. Wrong

1. Right

2. Wrong

3. Wrong

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4. Wrong

1. Wrong. It is physical change


3. Right. It is chemical change


1. Wrong. Second statement is wrong

2. Wrong. First statement is right

3. Right

4. Wrong

1. Wrong :Reversible change2. Right

3. Wrong : slow process

4. Wrong : physical, reversible

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1. Wrong definition of pathogen


3. Right definition


1. Right definition

2. Wrong definition

3. Wrong definition

4. Wrong definition

1. Wrong:

2. Wrong:

3. Wrong:

4.Right

1. Right :

2. Wrong :

3. Wrong : Pneumonia affects lungs

4. Wrong : Typhoid affects

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1. Wrong :

2. Wrong :

3. Wrong :

4. Right :

1. Wrong: Affects Lungs

2. Right

3. Wrong: Affects Liver

4. Wrong: Affects intestine

1. Right :

2. Wrong : Affects Throat

3. Wrong : Affects Lungs

4. Wrong : Affects Intestine

The administration of vaccine capable ofevoking an immune response against a

specific antigen thereby making the individual

immune to it and protected from contracting

the disease

1. Wrong: We use Antibiotic

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2. Right.

3. Wrong

4. Wrong

1. Wrong :

2. Right : . Fact

3. Wrong :

4. Wrong :

1. Wrong : Injection

2. Wrong : Injection

3. Right : Given drops

4. Wrong : vaccination is available

1. Wrong : It is a place where vaccination isgiven

2.Wrong : It decides the location for

vaccination for public

3. Right : It is the exact department which

decides on vaccination

4. Wrong :

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1. Right : . Definition of First Aid

2. Wrong :

3. Wrong :

4. Wrong :

1. Right :

2. Wrong :

3. Wrong :

4. Wrong :

1. Right :

2. Wrong :

3. Wrong :4. Wrong :

1. Right :

2. Right :

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3. Right. Both 1,2 true

4. Wrong :

r2_answer

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