Choose the correct one

(a)

mm < cm < m < km

(b)

mm > cm > m > km

(c)

km < m < cm < mm

(d)

mm > m > cm > km

Rulers, measuring tapes and metre scales are used to measure

(a)

Mass

(b)

Weight

(c)

Time

(d)

Length

1 metric ton is equal to

(a)

100 quintals

(b)

10 quintals

(c)

1/10 quintals

(d)

1/100 quintals

Distance between Chennai and Kanyakumari can be found in

(a)

Kilometres

(b)

Metres

(c)

Centimetres

(d)

Millimetres

Which among the following is not a device to measure mass?

(a)

Spring balance

(b)

Beam balance

(c)

Physical balance

(d)

Digital balance

Slope of the velocity - time graph gives

(a)

speed

(b)

displacement

(c)

distance

(d)

acceleration

Which of the following graph represents uniform motion of a moving particle?

(a)

(b)

(c)

(d)

A body moving with an initial velocity 5ms^-1 and accelerates at 2ms^-2. Its velocity after 10s is

(a)

20ms^-1

(b)

25ms^-1

(c)

5ms^-1

(d)

22.55ms^-1

In a 100m race, the winner takes 10s to reach the finishing point. The average speed of the winner is

(a)

5ms^-1

(b)

20ms^-1

(c)

40ms^-1

(d)

10ms^-1

The area under velocity – time graph represents the

(a)

velocity of the moving object

(b)

displacement covered by the moving object

(c)

speed of the moving object

(d)

acceleration of the moving object

A car is being driven at a speed of 20 ms^-1 when brakes are applied to bring it to rest in 5 s. The decelaration produced in this case will be

(a)

+4 ms^-2

(b)

‒4 ms^-2

(c)

‒0.25 ms^-2

(d)

+0.25 ms^-2

Unit of acceleration is

(a)

ms^-1

(b)

ms^-2

(c)

ms

(d)

ms²

Which one of the following is most likely not a case of uniform circular motion?

(a)

Motion of the Earth around the Sun

(b)

Motion of a toy train on a circular track

(c)

Motion of a racing car on a circular track.

(d)

Motion of hours' hand on the dial of the clock

The force responsible for drying of clothes in a washing machine is

(a)

Centripetal force

(b)

Centrifugal force

(c)

Gravitational force

(d)

Electrostatic force

The centrifugal force is

(a)

Real force

(b)

The force of reaction of centripetal force

(c)

Virtual force

(d)

Directed towards the centre of the circular path.

The area under velocity time graph represents

(a)

Velocity of the moving object

(b)

Displacement covered by the moving object

(c)

Speed of the moving object

When a body starts from rest, the acceleration of the body after 2 second in _____________ of its displacement.

(a)

Half

(b)

Twice

(c)

Four times

(d)

One fourth

In a 100 m race, the winner takes 10 s to reach the finishing point. The average speed of the winner is ___________ ms^-1.

(a)

5

(b)

10

(c)

20

(d)

40

Force involved in uniform circular motion is given by _____________.

(a)

f = mv²/r

(b)

f = mvr

(c)

f = mr²/v

(d)

f = v²/r

The field of view is maximum for ________ 

(a)

plane mirror

(b)

concave mirror

(c)

convex mirror

A ray of light passes from one medium to another medium. Refraction takes place when angle of incidence is

(a)

0^o

(b)

45^o

(c)

90^o

(d)

120^o

_________ is used as reflectors in torchlight.

(a)

concave mirror

(b)

convex mirror

(c)

plane mirror

(d)

None of these

When the reflecting surface is curved outwards the mirror formed will be

(a)

concave mirror

(b)

convex mirror

(c)

plane mirror

(d)

spherical mirror

The focal length of a concave mirror is 5cm. Its radius of curvature is

(a)

5 cm

(b)

10 cm

(c)

2.5 cm

When a beam of white light passes through a prism it gets

(a)

Reflected

(b)

deviated and dispersed

(c)

only deviated

(d)

refracted

The speed of light is maximum in

(a)

vacuum

(b)

glass

(c)

diamond

(d)

graphite

A real and enlarged image can be obtained by using a

(a)

convex mirror

(b)

plane mirror

(c)

concave mirror

Which of the following statements about total internal reflection is true?

(a)

angle of incidence should be greater than critical angle

(b)

light must travel from a medium of higher refractive index to a medium of lower refractive index

(c)

both (a) and (b)

The physical state of water at 373 K is

(a)

Solid

(b)

liquid

(c)

vapour

(d)

plasma

Among the following______is a mixture

(a)

Common Salt

(b)

Juice

(c)

Carbon dioxide

(d)

Pure Silver

When we mix a drop of ink in water we get a__________

(a)

Heterogeneous Mixture

(b)

Homogeneous Mixture

(c)

Compound

(d)

Suspension

The constituents that form a mixture are also called

(a)

Elements

(b)

Compounds

(c)

Alloys

(d)

Components

__________ has the same properties throughout the sample

(a)

Pure substance

(b)

Mixture

(c)

Colloid

(d)

Suspension

Difference in ________________is the principle used in fractional distillation

(a)

solubility

(b)

melting point

(c)

boiling point

(d)

adsorption

The separation of denser particles from lighter particles done by rotation at high speed is called ________

(a)

Filtration

(b)

sedimentation

(c)

decantation

(d)

centrifugation

______ is essential to perform separation by solvent extraction method.

(a)

Separating funnel

(b)

centrifuge machine

(c)

filter paper

(d)

sieve

Filtration method is effective in separating _______ mixture

(a)

Solid-solid

(b)

solid-liquid

(c)

liquid-liquid

(d)

liquid-gas

For a simple distillation process we need to have

(a)

an evaporating dish

(b)

a separating funnel

(c)

a filter with filter paper

(d)

a Liebig condenser

Among the following the odd pair is

(a)

₈O¹⁸,9F¹⁹

(b)

₁₈Ar⁴⁰,₇N¹⁴

(c)

₁₄Si³⁰, _15P³¹

(d)

₂₄Cr⁵⁴, ₁₉K³⁹

Change in the number of neutrons in an atom changes it to

(a)

an ion

(b)

an isotope

(c)

an isobar

(d)

another element

The term nucleons refer to

(a)

Protons and electrons

(b)

only Neutrons

(c)

electrons and neutrons

(d)

Protons and neutrons

The number of protons, neutrons and electrons present respectively in \(_{ 35 }^{ 80 }{ Br }\)

(a)

80, 80, 35

(b)

35, 55, 80

(c)

35, 35, 80

(d)

35, 45, 35

The correct electronic configuration of potassium is

(a)

2,8,9

(b)

2,8,1

(c)

2,8,8,1

(d)

2,8,8,3

A big tree falls in a forest but its roots are still in contact with the soil. The branches of this fallen tree straight up. This happens in response to __________

(a)

water and light

(b)

water and minerals

(c)

gravity and water

(d)

light and gravity

The tropic movement that helps the climbing vines to find a suitable support is ________. 

(a)

phototropism

(b)

geotropism

(c)

thigmotropism

(d)

chemotropism

The chemical reaction occurs during photosynthesis is ________. 

(a)

CO₂ is reduced and water is oxidized

(b)

water is reduced and CO₂ is oxidized

(c)

both CO₂ and water are oxidized

(d)

both CO₂ and water are produced

Transpiration is best defined as _________ 

(a)

loss of water by the plant

(b)

evaporation of water from the aerial surfaces from the plant

(c)

loss of water in the form of water vapour from the underground parts of the plant body

(d)

release of water from the plant into the atmosphere

The bending of root of a plant in response to water is called _________ 

(a)

thigmonasty

(b)

phototropism

(c)

hydrotropism

(d)

photonasty

A growing seedling is kept in the dark room. A burning candle is placed near it for a few days. The tip part of the seedling bends towards the burning candle. This is an example of ____________.

(a)

chemotropism

(b)

thigmotropism

(c)

phototropism

(d)

geotropism

The root of the plant is __________.
i) positively phototropic but negatively geotropic
ii) positively geotropic but negatively phototropic
iii) negatively phototropic but positively hydrotropic
iv)negatively hydrotropic but positively phototropic

(a)

(i) and (ii)

(b)

(ii) and (iii)

(c)

(iii) and (iv)

(d)

(i) and (iv)

The plant part which exhibits negative geotropism is __________.

(a)

root

(b)

stem

(c)

branch

(d)

leaves

The non-directional movement of a plant part in response to temperature is called ________.

(a)

thermotropism

(b)

Thermonasty

(c)

chemotropism

(d)

thigmonasty

Dandelion flowers open the petals in bright light during the day time but close the petals in dark at night. This response of Dandelion flowers is called ___________.

(a)

geonasty

(b)

thigmonasty

(c)

chemonasty

(d)

photonasty

During photosynthesis plants exhale _______. 

(a)

Carbon dioxide

(b)

oxygen

(c)

hydrogen

(d)

helium

Chlorophyll in a leaf is required for __________.

(a)

photosynthesis

(b)

transpiration

(c)

tropic movement

(d)

nastic movement

A plant is kept in a dark room for about 24 hours before conducting any experiment on photosynthesis in order to _______.

(a)

remove chlorophyll from the leaf

(b)

remove starch from the leaves

(c)

ensure that photosynthesis occurred

(d)

to prove transpiration

Transpiration takes place through _____________.

(a)

fruit

(b)

seed

(c)

flower

(d)

stomata

Which is not an insect?

(a)

House fly

(b)

Bedbug

(c)

Mosquito

(d)

Spider

Find the group having only marine members

(a)

Mollusca

(b)

Porifera

(c)

Coelenterata

(d)

Echinodermata

Mesoglea is present in

(a)

Porifera

(b)

Coelenterata

(c)

Annelida

(d)

Arthropoda

Dysentery is caused by

(a)

Entamoeba

(b)

Euglena

(c)

Plasmodium

(d)

Paramecium

Which one of the following pairs is not a poikilothermic animal?

(a)

Fishes and Amphibians

(b)

Amphibians and Aves

(c)

Aves and Mammals

(d)

Reptiles and mammals

Identify the animal having four chambered heart

(a)

Lizard

(b)

Snake

(c)

Crocodile

(d)

Calotes

Which is not a feature of chordates

(a)

Green glands

(b)

Sweat glands

(c)

Sebaceous gland

(d)

Mammary gland

The bilaterally symmetrical larvae which transform into radially symmetrical adult is

(a)

Bipinnaria

(b)

Trochophore

(c)

Tadpole

(d)

Polyp

The animal without skull is

(a)

Acrania

(b)

Acephalia

(c)

Apteria

(d)

Acoelomate

Choose the correct terms related for Hemichordate

(a)

Vermiform, unsegmented, triploblastic, ciliary feeders

(b)

Vermiform, segmented, triploblastic, ciliary feeders

(c)

Vermiform, unsegmented, diploblastic, ciliary feeders

(d)

Vermiform, unsegmented, triploblastic, filter feeders

Hermaphrodite organisms are

(a)

Hydra, Tape worm, Earthworm, Amphioxus

(b)

Hydra, Tape worm, Earthworm, Ascidian

(c)

Hydra, Tape worm, Earthworm, Balanoglossus

(d)

Hydra, Tape worm, Ascaris, Earthworm

Poikilothermic organisms are

(a)

Fish, Frog, lizard, man

(b)

Fish, Frog, lizard, cow

(c)

Fish, Frog, lizard, snake

(d)

Fish, Frog, lizard, crow

Excretory organ of tape worm is

(a)

Flame cells

(b)

Nephridia

(c)

Body surface

(d)

Solenocytes

Tube like alimentary canal is found in

(a)

Hydra

(b)

Earth worm

(c)

Starfish

(d)

Ascaris

During ecdysis which of the following is shed off

(a)

Chitin

(b)

Mantle

(c)

Scales

(d)

Operculum

Cephalization is related to

(a)

Head formation

(b)

Gut formation

(c)

Coelom formation

(d)

Gonad formation

The nutrient required in trace amounts to accomplish various body functions is ____________.

(a)

Carbohydrate

(b)

Protein

(c)

Vitamin

(d)

Fat

The physician who discovered that scurvy can be cured by ingestion of citrus fruits is  ______________

(a)

James Lind

(b)

Louis Pasteur

(c)

Charles Darwin

(d)

Isaac Newton

The sprouting of onion and potatoes can be delayed by the process of _______________

(a)

irradiation

(b)

freezing

(c)

Salting

(d)

Canning

Food and Adulteration Act was enforced by Government of India in the year __________.

(a)

1964

(b)

1954

(c)

1950

(d)

1963

An internal factor responsible for spoilage of food is ___________.

(a)

Wax coating

(b)

Contaminated utensils

(c)

Moisture content in food

(d)

Synthetic preservatives

____________ is an electronic device which stores data and information

(a)

Telescope

(b)

Television

(c)

Computer

(d)

Radio

_________ belongs to the generation IV of the computer

(a)

Microprocessor

(b)

Artificial intelligence

(c)

Transistor

(d)

Vaccum Tubes

Data processing involves________ steps

(a)

seven

(b)

four

(c)

six

(d)

eight

1. Abacus belongs to the first generation of the computer
2. ENIAC was used in the American military

(a)

Both the statements are correct

(b)

Statement 1 is wrong but 2 is correct

(c)

Statement 1 is correct but 2 is wrong

(d)

Both the statements are wrong.

The motion of a city bus in a heavy traffic road is an example for uniform motion

(a) True

(b) False

Acceleration can get negative value also.

(a) True

(b) False

Distance covered by a particle never becomes zero but displacement becomes zero

(a) True

(b) False

The velocity – time graph of a particle falling freely under gravity would be a straight line parallel to the x axis

(a) True

(b) False

If the velocity – time graph of a particle is a straight line inclined to X-axis then its displacement – time graph will be a straight line?

(a) True

(b) False

The angle of deviation depends on the refractive index of the glass

(a) True

(b) False

If the object is at infinity in front of a convex mirror the image is formed at infinity.

(a) True

(b) False

The convex mirror always produces a virtual, diminished and erect image of the object.

(a) True

(b) False

When an object is at the centre of curvature of concave mirror the image formed will be virtual and erect.

(a) True

(b) False

The reason for brilliance of diamonds is mainly due to total internal reflection of light.

(a) True

(b) False