Rulers, measuring tapes and metre scales are used to measure

(a)

Mass

(b)

Weight

(c)

Time

(d)

Length

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

(a)

(b)

(c)

(d)

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 field of view is maximum for ________ 

(a)

plane mirror

(b)

concave mirror

(c)

convex mirror

______ 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

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 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

During photosynthesis plants exhale _______. 

(a)

Carbon dioxide

(b)

oxygen

(c)

hydrogen

(d)

helium

Dysentery is caused by

(a)

Entamoeba

(b)

Euglena

(c)

Plasmodium

(d)

Paramecium

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

Tube like alimentary canal is found in

(a)

Hydra

(b)

Earth worm

(c)

Starfish

(d)

Ascaris

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

_________ belongs to the generation IV of the computer

(a)

Microprocessor

(b)

Artificial intelligence

(c)

Transistor

(d)

Vaccum Tubes

Metre is the unit of ________

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length

1 kg of rice is weighed by ______

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common (beam) balance

Consider an object is rest at position x = 20m. Then its displacement – time graph will be straight line to _____________ the axis.

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Parallel to

In going from a rarer to denser medium, the ray of light bends _________

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  towards the normal

Large _________ mirrors are used to concentrate sunlight to produce heat in solar furnaces

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  concave

1500C = __________ K

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  1773.15 ^oK

Alcohol can be separated from water by _________________

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fractional distillation

Calcium and Argon are examples of a pair of __________

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isobars     

The number of neutrons present in \(_{ 3 }^{ 7 }{ Li }\) is ------

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  4 

__________ is positively hydrotropic as well as positively geotropic.

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Root

Plants inhale and exhale continuously through the __________.

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Stomata

The excretory opening of Porifera is________ 

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Ostia

Blue revolution is the rearing of ______________.

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Fishes

Deficiency diseases can be prevented by taking _______________ diet.

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balanced

The process of affecting the natural composition and the quality of food substance is known as _______________

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Adulteration

Motion with non uniform acceleration

(1)

Muscular fatigue

Constant retardation

(2)

Refraction

Coin inside water appearing slightly raised

(3)

9.31 x 10^-28g

Used as Dentist’s mirror

(4)

Concave mirror

Mass of electron

(5)

Charge of proton

(6)

II generation

Roots growing downwards into soil

(7)

Osteoporosis

Calcium

(8)

Potassium

(9)

1.6 x 10^-19C

Transistor

(10)

Positive geotropism

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

An object is placed at distance of 3 cm from a plane mirror. The distance of the object and image is 3 cm.

(a) True

(b) False

The distance from centre of curvature of the mirror to the pole is called the focal length of the mirror.

(a) True

(b) False

Aspirin is composed of 60% Carbon, 4.5% Hydrogen and 35.5% Oxygen by mass. Aspirin is a mixture.

(a) True

(b) False

Electrons have negligible mass and charge.

(a) True

(b) False

Scientific term used to represent the bending of roots towards water is called geotropism.

(a) True

(b) False

Fishes have two chambered heart.

(a) True

(b) False

Vitamins are required in large quantities for normal functioning of the body -

(a) True

(b) False