Choose the correct one

(a)

mm < cm < m < km

(b)

mm > cm > m > km

(c)

km < m < cm < mm

(d)

mm > m > cm > km

Moment is equal to_________of an hour.

(a)

\(\frac{1}{40}\)

(b)

\(\frac{1}{80}\)

(c)

\(\frac{1}{60}\)

(d)

\(\frac{1}{20}\)

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

In which direction of the motion of the particles does centripetal force act?

(a)

parallel

(b)

radial

(c)

tangential

(d)

perpendicular

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

(a)

Filtration

(b)

sedimentation

(c)

decantation

(d)

centrifugation

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

Law of multiple proportions was proposed by _________

(a)

J. Ritcher

(b)

Rutherford

(c)

John Dalton

(d)

J.J Thomson

The plant part which exhibits negative geotropism is __________.

(a)

root

(b)

stem

(c)

branch

(d)

leaves

The animal without skull is

(a)

Acrania

(b)

Acephalia

(c)

Apteria

(d)

Acoelomate

Identify the single celled organism.

(a)

Fern

(b)

Rabbit

(c)

Cat

(d)

Pond algae

A device in which the loss of heat due to conduction, convection and radiation is minimized in

(a)

Solar cell

(b)

Solar cooker

(c)

Thermometer

(d)

Thermos flask

Transformer works on.

(a)

AC only

(b)

DC only

(c)

both AC and DC

(d)

AC nor effectively than DC

____________compounds have high melting and boiling points.

(a)

Covalent

(b)

Coordinate

(c)

Ionic

(d)

Coordinate

Aerenchyma is found in

(a)

epiphytes

(b)

hydrophytes

(c)

halophytes

(d)

xerophytes

Which one of the following substance is not a constituent of sweat?

(a)

Urea

(b)

Protein

(c)

Water

(d)

Salt

Which of the following statement best describes frequency?

(a)

the number of complete vibrations per second.

(b)

the distance travelled by a wave per second.

(c)

the distance between one crest of wave and the next one.

(d)

the maximum disturbance caused by a wave.

Diamond is not a good conductor of electricity because

(a)

it is very hard

(b)

it has no free electron

(c)

its structure is uniform

(d)

it is insoluble in water

Radiochemistry deals with

(a)

oxidants

(b)

batteries

(c)

isotopes

(d)

nanoparticles

Which one of the following is refered as red worms?

(a)

Eudrilus fetida

(b)

Eudrilus eugieniae

(c)

Perionyx excavatus

(d)

Lampito mauritii