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

Speed is never ______

(a)

fraction

(b)

negative

(c)

zero

(d)

positive

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

(a)

Heterogeneous Mixture

(b)

Homogeneous Mixture

(c)

Compound

(d)

Suspension

Protons and neutrons are collectively called as ________

(a)

mesons

(b)

neutrino

(c)

Nucleons

(d)

Positrons

The plant part which exhibits negative geotropism is __________.

(a)

root

(b)

stem

(c)

branch

(d)

leaves

Excretory organ of tape worm is

(a)

Flame cells

(b)

Nephridia

(c)

Body surface

(d)

Solenocytes

The first systematic approach to the classification of living organisms was made by________.

(a)

Hooker

(b)

Carolus Linnaeus

(c)

Robert

(d)

Lister

The polysaccharide found in liver and muscles is ___________ .

(a)

Starch

(b)

Cellulose

(c)

Chitin

(d)

Glycogen

____________ is an electronic device which stores data and information

(a)

Telescope

(b)

Television

(c)

Computer

(d)

Radio

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

When we heat one end of an iron rod, its other end also get heated. Can you say, Which one of the following is behind this?

(a)

Convection of heat

(b)

Radiation of heat

(c)

Insulation of heat

(d)

Conduction of heat

If the electronic configuration of an element is 1s² 2s² 2p⁶ 3s² 3p¹, then it will occupy___________ block of the periodic table.

(a)

s

(b)

p

(c)

d

(d)

f

Statement (A) : Covalent compounds are bad conductor of electricity.
Reason (B) Covalent compounds contain charged particles (ions)

(a)

B explains A

(b)

B does not explain A

(c)

Both A & B are right

(d)

Both A & B are wrong

A meristematic tissue consists of

(a)

Immature cells which are in a state of division and growth

(b)

Mature cells

(c)

Non-living cells

(d)

Sclerenchyma cells

To prevent the entry of food into the trachea, the opening is guarded by__________

(a)

epiglottis

(b)

glottis

(c)

hard palate

(d)

soft palate

Lysozyme is seen in_______

(a)

gastric juice

(b)

intestinal juice

(c)

Bile

(d)

saliva

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.

Which of the following are infrasonic waves?

(a)

5 kHz

(b)

25 Hz

(c)

10 Hz

(d)

15000 Hz

Which of the following is highly toxic?

(a)

Carbon dioxide

(b)

Carbon monoxide

(c)

Calcium carbonate

(d)

Sodium bicarbonate

Which one of the following is not an exotic breed of cow?

(a)

Jersey

(b)

Holstein-Friesan

(c)

Sahiwal

(d)

Brown Swiss