Physics
Chemistry
Biology
Random1
Random2
100

the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other is known as _______

friction

100

Supporter of Combustion

Oxygen

100

The male gametes of humans are 

sperms

100

The type of friction which is the strongest friction

Static friction

100

the angle of incidence and angle of reflection of light is _________

equal

200

The number of oscillations per second (chapter-Sound)

frequency

200

The substances undergoing combustion are termed as combustible substances or ________

fuels

200

The process of removing the chaff from grains

threshing

200

The light ray that comes back from the surface after reflection is known as the ____________

Reflected ray

200

Petrol and Diesel are obtained from a natural resource called ________

Petroleum

300

Audible sound for human (range in Hz) is ___________

20Hz-20000Hz

300

Calorific value of(in kj):(100 for each correct)

1)Kerosene

2)Methane

3)Hydrogen


Kerosene-45000kj

Methane-50000kj

Hydrogen-150000kj

300

Animals reared at home or farm on a large scale is known as ________

Animal Husbandry

300

The light ray which strikes any surface is called the ____________

Incident Ray

300

An electroscope is a device which is used to find if an object is __________.

a)Magnetic

b)Charged

c)Hot

b)Charged

400

The force that acts on an object due to the earth's gravitational pull is called

Weight

400

The British chemist who discovered electrolysis of water

William Nicholson

400

Four major groups of microorganisms are

Bacteria, fungi, protozoa, algae

400

The black, thick liquid with an unpleasant smell, a mixture of about 200 substances. It is __________ 

coal tar

400

The earth's plate responsible for causing earthquakes is _____________

the crust of the earth

500

Pressure exerted by a gas depends on ___________

volume and temperature (250 for each correct)

500

The reaction at cathode and anode during electrolysis of water(chemical reaction)(chemical equations)

cathode:2H+-2E- = H2

anode:4OH--4E- = O2+2H2O

500

Robert Koch in 1876 discovered the bacterium ______ which causes ________ disease.

1(Bacillus anthracis)               

  2 (anthrax)

500

A tough, porous and black substance which is almost a pure form of carbon and is used in the manufacture of steel and in the extraction of many metals. It is ________

coke

500

The boundaries of the earth's plate is known as 

Seismic Zone

Fault Zone

(250 point for each correct)