The area under velocity – time graph represents the

(a)

velocity of the moving object

(b)

displacement covered by the moving object

(c)

speed of the moving object

(d)

acceleration of the moving object

The velocity time graph is parallel to X-axis it shows _______.

(a)

uniform velocity of an object

(b)

non-uniform velocity

(c)

stationary position of an object

(d)

acceleration motion of an object

Change in the number of neutrons in an atom changes it to

(a)

an ion

(b)

an isotope

(c)

an isobar

(d)

another element

Elements which have valence electrons 1 or 2 or 3 are ____________

(a)

metal

(b)

non-metal

(c)

rare metal

(d)

valuable metal

Identify the emerald green sea slug________________.

(a)

Vaucheria litorea

(b)

Nepenthes

(c)

Droseta

(d)

Elysia chlorotica

Which is not a feature of chordates

(a)

Green glands

(b)

Sweat glands

(c)

Sebaceous gland

(d)

Mammary gland

The binomial name of star fish is_________.

(a)

Pila globosa

(b)

Asterias rubens

(c)

Hydra vulgaris

(d)

Amoebaproteus

Blood clot is prevented by the vitamin _________ .

(a)

A

(b)

D

(c)

E

(d)

K

Two cylinders of equal height and radius are made of copper and aluminium. Which of them conducts heat faster?

(a)

Copper rod

(b)

Aluminium rod

(c)

Both of them

(d)

None of them

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

Assertion (A): Non-metals are electronegative.
Reason (R) : Non-metal lose electrons to form cation

(a)

Both A & R are right

(b)

Both A & R are wrong

(c)

A is right R is wrong

(d)

A is wrong R is right

The element that would form anion by gaining electrons in a chemical reaction is ___________.

(a)

Potassium

(b)

Calcium

(c)

Fluorine

(d)

Iron

In a certain type of cell division the diploid number of chromosome is reduced to half. This kind of division occurs in

(a)

testis

(b)

ovary

(c)

both ovary and testis

(d)

all body cells

The function of phloem  fibres is__________

(a)

passage of food

(b)

store food

(c)

mechanical strength

(d)

preparation of food

The act of bringing swallowed food back to the mouth is called___________

(a)

egestion

(b)

ingestion

(c)

micturition

(d)

regurgitation

If the speed of a wave is 340 m s^-1 and its frequency is 1700 Hz, then wavelength λ for this wave in cm will be

(a)

34

(b)

20

(c)

15

(d)

0.2

Which of the following are infrasonic waves?

(a)

5 kHz

(b)

25 Hz

(c)

10 Hz

(d)

15000 Hz

In a covalent bond formation

(a)

transfer of electrons takes place

(b)

equal sharing of electrons between two atoms takes place.

(c)

electrons are shared by one atom only.

(d)

electrons are donated by one atom and shared by both atoms.

The antibiotic Penicillin is obtained from ___________ 

(a)

plant

(b)

microorganism

(c)

animal

(d)

sunlight

Which of the following are Indian cattle?
i. Bos indicus
ii. Bos domesticus
iii. Bos bubalis
iv. Bos vulgaris

(a)

i and ii

(b)

i and iii

(c)

ii and iii

(d)

iii and iv