A 15 gm bullet is fired from a 7.5 kg gun at 380 m/s. The momentum of the gun will be:

• A) 2850 Ns
• B) 5700 Ns
• C) 2850000 Ns
• D) 5.7 Ns

The removal of undigested matter from body is called ________.

• A) Elimination
• B) Absorption
• C) Assimilation
• D) Indigestion

Through ---------- material, light can pass but scattered in different directions

• A) Transparent
• B) Refraction
• C) Reflection
• D) Translucent

The fundamental unit of mass is:

• A) ounce
• B) kilogram
• C) gram
• D) pound

-------------is combined with iron to make steel

• A) Iodine
• B) Sulphur
• C) Magnesium
• D) Carbon

A single living thing

• A) none of the these
• B) community
• C) organism
• D) population

Rusting of iron is an example of _________ reaction.

• A) Neutralization
• B) Reduction
• C) Oxidation
• D) Hydrogenation

A car travels at 10 km/hr for 2 hours and then at 13 km/hr for 1 hour. What is the value of average speed in km/hr?

• A) 17km/hr
• B) 11km/hr
• C) 8km/hr
• D) 15km/hr

The atom, which provides the electron pair, is called_________

• A) accepter
• B) receiver
• C) Donor
• D) gainer

In hot dip method, sheets of iron are dipped in molten

• A) Sodium
• B) Tin
• C) Zinc
• D) Mercury

Which of the following is a derived unit:

• A) Ampere
• B) Newton
• C) Kilogram
• D) Kelvin

The reaction in which one substance is replaced by another substance is called _________.

• A) Neutralization reaction
• B) Elimination reaction
• C) Substitution reaction
• D) Addition reaction

The post house of a cell is known as ________.

• A) Nucleus
• B) Golgi apparatus
• C) Centrioles
• D) Lysosomes

Air can enter the body and travel to the lungs...

• A) through the oesophagus and gullet
• B) through the mouth and the nose
• C) through the nose and the nervous system
• D) through the windpipe and the pores

A motor pumps 4,000 kg of water from a ground tank to an overhead tank 50 m up in one hour. The power of the motor is:

• A) 33,333 W
• B) 250 W
• C) 55.5 W
• D) 555 W

Due to anomalous expansion liquid-water has a volume increase as it cools below:

• A) 4 ºC
• B) –10 ºC
• C) –4 ºC
• D) 10 ºC

Simple thermostat works on:

• A) Thermal expansion
• B) Specific heat
• C) The second law of thermodynamics
• D) Condensation

Normally when heat is added to a body it properties i.e. energy, temperature and volume changes, which line could best represent this:
energy temperature volume

• A) gains falls contracts
• B) gains rises expands
• C) loses rises contracts
• D) loses falls expands

Some of energy radiated by sun is captured by earth but the normal surface temperature of earth remains about 300K. Why does not the earth’s temperature rise as it captures the sun’s energy?

• A) The earth reflects the sun’s light.
• B) The earth radiates an amount of energy into space equal to the amount it receives.
• C) The heat is carried away from the earth by convection currents
• D) The energy only raises the temperature of the upper atmosphere and never reaches the surface.

Matter can exist in four states (i) gas, (ii) plasma, (iii) Solid and (iv) liquid. For a particular element normally the states arranged in order of falling temperature (highest to lowest) are:

• A) (i), (ii), (iii) and (iv)
• B) (ii), (i), (iv) and (iii
• C) (iv), (iii), (ii) and (i)
• D) (iii), (iv), (i) and (ii)