Unit of time is_________.

(a)

km

(b)

mm

(c)

second

(d)

cm

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

Mirrors having spherical surface of reflection are __________________

(a)

plane mirror

(b)

lenses

(c)

spherical mirrors

(d)

prism

Gel are______solutions with liquid dispersed in solid

(a)

True

(b)

Suspension

(c)

Colloid

(d)

Homogeneous

Among the following the odd pair is

(a)

₈O¹⁸,9F¹⁹

(b)

₁₈Ar⁴⁰,₇N¹⁴

(c)

₁₄Si³⁰, _15P³¹

(d)

₂₄Cr⁵⁴, ₁₉K³⁹

The plant which respond to gravity is termed as_________________.

(a)

Gravitropism

(b)

Thermotropism

(c)

Seismotropism

(d)

Phototropism

___________________% of water is used to produce carbohydrates by the plants.

(a)

0.01%

(b)

0.001%

(c)

0.1%

(d)

0.6%.

Poikilothermic organisms are

(a)

Fish, Frog, lizard, man

(b)

Fish, Frog, lizard, cow

(c)

Fish, Frog, lizard, snake

(d)

Fish, Frog, lizard, crow

Find the incorrect pair.
 

(a)

 Earth worm - Metamerism

(b)

Round worm - Pseudocoelom

(c)

Hydra Polyp - Medusa

(d)

Star fish - Asymmetrical

The body of soft bodied animals are covered by__________.

(a)

Spicules

(b)

Scales

(c)

Bristles

(d)

Mantle

Vitamin E is otherwise known as _________ .

(a)

Riboflavin

(b)

Thiamine

(c)

Tocopherol

(d)

Calciferol

Ice does not melt rapidly because of

(a)

high specific heat capacity

(b)

high latent of fusion

(c)

high heat capacity

(d)

high latent heat of fusion

An electric generator converts

(a)

electrical energy into mechanical energy

(b)

mechanical energy into heat energy

(c)

electrical energy into electrical energy

(d)

mechanical energy into electrical energy

Oxidising agents are also called as____________because they remove electrons form other substances.

(a)

electron donors

(b)

electron acceptors

(c)

reducing agents

(d)

Ionic agents

The pH value of neutral solution is______

(a)

=7

(b)

<7

(c)

none of the above

(d)

-7

Unstriated muscles are found in

(a)

blood vessels

(b)

gastrointestinal tract

(c)

urinary bladder

(d)

all of these

Which of the following is not a part of female reproductive system?

(a)

Ovary

(b)

Uterus

(c)

Testes

(d)

Fallopian tube

A musical instrument is producing continuous note. This note cannot be heard by a person having a normal hearing range. This note must then be passing through

(a)

wax

(b)

vacuum

(c)

water

(d)

empty vessel

The cathode of an electrochemical reaction involves ____________

(a)

oxidation

(b)

reduction

(c)

neutralisation

(d)

catenation

Which one of the following is refered as red worms?

(a)

Eudrilus fetida

(b)

Eudrilus eugieniae

(c)

Perionyx excavatus

(d)

Lampito mauritii