Choose the correct one

(a)

mm < cm < m < km

(b)

mm > cm > m > km

(c)

km < m < cm < mm

(d)

mm > m > cm > km

1 metric ton is equal to

(a)

100 quintals

(b)

10 quintals

(c)

1/10 quintals

(d)

1/100 quintals

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

(a)

Centripetal force

(b)

Centrifugal force

(c)

Gravitational force

(d)

Electrostatic force

Force involved in uniform circular motion is given by _____________.

(a)

f = mv²/r

(b)

f = mvr

(c)

f = mr²/v

(d)

f = v²/r

_________ is used as reflectors in torchlight.

(a)

concave mirror

(b)

convex mirror

(c)

plane mirror

(d)

None of these

A real and enlarged image can be obtained by using a

(a)

convex mirror

(b)

plane mirror

(c)

concave mirror

The physical state of water at 373 K is

(a)

Solid

(b)

liquid

(c)

vapour

(d)

plasma

The constituents that form a mixture are also called

(a)

Elements

(b)

Compounds

(c)

Alloys

(d)

Components

Among the following the odd pair is

(a)

₈O¹⁸,9F¹⁹

(b)

₁₈Ar⁴⁰,₇N¹⁴

(c)

₁₄Si³⁰, _15P³¹

(d)

₂₄Cr⁵⁴, ₁₉K³⁹

The term nucleons refer to

(a)

Protons and electrons

(b)

only Neutrons

(c)

electrons and neutrons

(d)

Protons and neutrons

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

(a)

phototropism

(b)

geotropism

(c)

thigmotropism

(d)

chemotropism

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

(a)

thermotropism

(b)

Thermonasty

(c)

chemotropism

(d)

thigmonasty

During ecdysis which of the following is shed off

(a)

Chitin

(b)

Mantle

(c)

Scales

(d)

Operculum

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

(a)

Carbohydrate

(b)

Protein

(c)

Vitamin

(d)

Fat

Data processing involves________ steps

(a)

seven

(b)

four

(c)

six

(d)

eight

1 kg of rice is weighed by ______

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common (beam) balance

Speed is a ____________ quantity whereas velocity is a ____________ quantity

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  scalar, vector

All distances parallel to the principal axis are measured from the ____________ of the mirror

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  pole

In petroleum refining, the method of separation used is _______

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Fractional distillation

Total Number of electrons that can be accommodated in an orbit is given by_________.

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   2n²

The shoot system grows upward in response to ___________.

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Light

Hydrotropism : Response towards water Phototropism : ___________

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response towards sunlight

The raw materials for photosynthesis are _________ and _______.

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CO₂, H₂O and Chlorophyll & Light

The binomial name of our National Bird is ______________.

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Pavo cristatus

Dehydration is based on the principle of removal of ____________.

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water/ moisture content

Constant retardation

(1)

Magnification

Used in hairpin bends in mountains

(2)

Mirage

(3)

Negative phototropism

Charge of proton

(4)

Total internal reflection

Shoots growing towards the light

(5)

Positive phototropism.

Roots growing downwards away from light

(6)

1.6 x 10^-19C

Iodine

(7)

Convex mirror

Text, number

(8)

Goitre

Ratio of height of image to height of object.

(9)

Motion of a body covering equal distances in equal interval of time

(10)

Information

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

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

(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

Photosynthesis is important in releasing oxygen to keep the atmosphere in balance.

(a) True

(b) False

Bipinnaria is the larva of Mollusca

(a) True

(b) False

Wings of birds are the modified forelimbs

(a) True

(b) False

Vitamin C is a water soluble Vitamin

(a) True

(b) False

Mention the differences between stomatal and lenticular transpiration

Give an example for the movement plant part which is very quick and can be observed easily

What is the full form of SI system?

Convert: 300 K into Celsius scale,

Name the spherical mirror(s) that has/have 
i) Virtual principal focus
ii) Real principal focus

A few drops of ‘Dettol’ when added to water the mixture turns turbid. Why?

Write the need of a standard unit.

The speed of a particle is constant. Will it have acceleration? Justify with an example.

State the direction of incident ray which after reflection from a spherical mirror retraces its path. Give reason for your answer.

How is the reproductive characters of mammals different from those of Aves?

Explain any two methods of food preservation.

Differentiate data and information.

A train travelling at a speed of 90 kmph. Brakes are applied so as to produce a uniform acceleration of ‒0.5 ms^-2. Find how far the train will go before it is brought to rest?

Light enters from air into a glass plate having refractive index 1.5. What is the speed of light in glass? (Speed of light in vacuum is 3 × 10⁸ ms^-1).

Calculate the mass of a proton, given its charge = + 1.60 \(\times\)10⁻¹⁹ C charge / mass = 9.58 \(\times\) 10⁷ C kg^-1

How are vitamins useful to us? Tabulate the sources, deficiency diseases and symptoms of fat soluble vitamins

List out the generations of computer