Plotting a graph for momentum on the Y-axis and time on X-axis. slope of momentum- time graph gives

(a)

Impulsive force

(b)

Acceleration

(c)

Force

(d)

Rate of force

Mixing sugar in a glass of milk using a spoon is ______

(a)

force

(b)

momentum

(c)

inertia of motion

(d)

inertia of direction

The acceleration in a body is due to

(a)

balanced force

(b)

unbalanced force

(c)

equilibriant

(d)

couple

The value of g

(a)

increases as we go above the earth's surface

(b)

decreases as we go to the centre of the earth

(c)

remains constant

(d)

is more at equator and less at poles

Power of a lens is –4D, then its focal length is

(a)

4m

(b)

–40m

(c)

–0.25 m

(d)

–2.5 m

When light travels from rarer to denser medium, the refracted ray is ______  the normal.

(a)

bent away

(b)

along

(c)

bent towards

(d)

just grazes the surface of separation

Highly enlarged image is obtained by convex lens when object is at

(a)

infinity

(b)

F

(c)

below F & C

(d)

beyond 2F

The defect of myopia can be corrected by using

(a)

Concave

(b)

Convex

(c)

Combination of lenses

(d)

None

To increase the magnification of the telescope, the focal length of the ______

(a)

Objective lens is small and eye lens is large

(b)

Objective lens is large and eye lens is small

(c)

Objective lens and eye lens are small

(d)

Objective lens and eye lens are large

If a substance is heated or cooled, the change in mass of that substance is

(a)

positive

(b)

negative

(c)

zero

(d)

none of the above

Linear expansion is the change in _____ when object is heated or cooled.

(a)

length

(b)

area

(c)

volume

(d)

density

The resistance of material depends on.

(a)

Temperature

(b)

Length of conductor

(c)

Area of cross-section

(d)

All the above

A heating element used in the electric iron box and the electric heater is

(a)

Tungsten

(b)

Nichrome

(c)

Lead

(d)

All the above

When a sound wave travels through air, the air particles

(a)

vibrate along the direction of the wave motion

(b)

vibrate but not in any fixed direction

(c)

vibrate perpendicular to the direction of the wave motion

(d)

do not vibrate

Infrasound can be heard or produced by

(a)

dog

(b)

bat

(c)

rhinoceros

(d)

human beings

____________ isotope is used for the treatment of cancer.

(a)

Radio Iodine

(b)

Radio Cobalt

(c)

Radio Carbon

(d)

Radio Nickel

A chain reaction is continuous due to

(a)

large mass defect

(b)

large energy

(c)

production of more neutrons in fission

(d)

None of these

__________ is fissionable by neutrons of all energies.

(a)

U²³⁵

(b)

U²³⁸

(c)

U²³⁹

(d)

Np²³⁹

In the nucleus of ₂₀Ca⁴⁰, there are 

(a)

20 protons and 40 neutrons

(b)

20 protons and 20 neutrons

(c)

20 protons and 40 electrons

(d)

40 protons and 20 electrons

Mass of an electron is

(a)

9.1083 x 10^-31kg

(b)

9.1083 x 10^-24kg

(c)

1.67262 x 10^-27kg

(d)

1.67 x 10^-24gm

Volume of a gas at STP is 1.12 x 10^-7 cc Calculate the number of molecules in it:

(a)

3.01 x 10²⁰

(b)

3.01 x 10¹⁵

(c)

3.01 x 10²³

(d)

3.01 x 10²⁴

The number of components in a binary solution is _____________

(a)

2

(b)

3

(c)

4

(d)

5

40 g of sodium chloride in 100 g of water at 25⁰ C forms ________ solution.

(a)

Super saturated

(b)

Unsaturated

(c)

Saturated

(d)

Both (a) and (b)

An example for a solution containing liquid solute in gas solvent is ____________

(a)

soda water

(b)

cloud

(c)

cork

(d)

smoke

Which of the following represents a precipitation reaction?

(a)

A_(s) + B_(s) → C_(s) + D_(s)

(b)

A_(s) + B_(aq) → C_(aq) + D_(l)

(c)

A_(aq) + B_(aq) → C_(s) + D_(aq)

(d)

A_(aq) + B_(s) → C_(aq) + D_(l)

Which of the following reactions is not feasible?

(a)

Zn + CuSO₄ ⟶ ZnSO₄ + Cu

(b)

2Ag + Cu (NO₃)₂  ⟶ AgNO₃ + Cu

(c)

Fe + CuSO₄ ⟶ FeSO₄ + Cu

(d)

Mg + 2HCI ⟶ MgCl₂+ H₂

Which of the following are used as anaesthetics?

(a)

Carboxylic acids

(b)

Ethers

(c)

Esters

(d)

Aldehydes

The sodium salt of long chain fatty acid which helps in cleaning of clothes is ________________

(a)

vinegar

(b)

detergent

(c)

soap

(d)

both (b) and (c)

There are ________ pairs of cranial nerves and _______ pairs of spinal nerves.

(a)

12, 31

(b)

31, 12

(c)

12, 13

(d)

12, 21

_____ is called Stress hormone.

(a)

Auxin

(b)

Gibberellin

(c)

Cytokinin

(d)

ABA

_____ helps in the breakdown of glycogen to glucose in the liver.

(a)

Ephinephrine

(b)

Norepinephrine

(c)

Glucagon

(d)

Insulin

________is a disc shaped structure.

(a)

Uterus

(b)

Placenta

(c)

Ovary

(d)

Sperm

The region of the chromosome where the spindle fibres get attached during cell division

(a)

Chromomere

(b)

Centrosome

(c)

Centromere

(d)

Chromonema

_________ or sediments fill the hollow depression and forms a cast.

(a)

Rocks

(b)

Sand

(c)

Soil

(d)

Minerals

Metastasis is associated with

(a)

Malignant tumour

(b)

Benign tumour

(c)

Both (a) and (b)

(d)

Crown gall tumour