A) Positron

B) Electron

C) Alpha particle

D) Neutron

A) clouds strike against impurities in air and the friction burns up these impurities

B) Similar charges of electricity rush towards each other and then get repelled

C) water vapour produces electricity in the clouds

D) strong opposite charges in different clouds break down the resistance offered by the intervening air

A) X–rays

B) Electrocardiograph

C) Encephalograph

D) Anti polio vaccine

A) 10

B) 40

C) 20

D) 80

A) Polymes are macromolecules

B) Polymers are large molecules composed of small monomeric units

C) All the above

D) Polymers are complex molecules composed of random sequences of atoms

A) decreases

B) increases

C) first increases and then decreases

D) remains the same

A) it will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down

B) the ball will travel towards the center of the circle and fall down

C) none of these

D) it will fall down at the same place where the string breaks

A) Bolometer

B) Barkometer

C) Barometer

D) Spectrometer

A) Nickel

B) an alloy of Tin and Lead

C) an alloy of Nickel and Lead

D) Copper

A) Spherical

B) Diverging

C) Achromatic

D) Converging

A) Proxemics communication

B) Haptics communication

C) Chronemics communication

D) Semantics communication

A) Gradient

B) Velocity

C) Meandering

D) Discharge

A) Torque

B) Velocity

C) Displacement

D) Acceleration

A) Rolling to Sliding

B) Static to Dynamic

C) Sliding to Rolling

D) Dynamic to Static

A) towards you

B) away from you

C) None of the above

D) Both A & B

A) the sample can conduct electricity

B) atoms in the sample react with oxygen

C) the sample melts at 1768k

D) each atom in the sample has 29 protons

A) Neutron

B) Electron

C) Deutron

D) Proton

A) The number of electrons is equal to the number of neutrons.

B) The atomic mass is equal to the atomic number.

C) The atomic mass is equal to the number of electrons.

D) The number of protons is equal to the number of electrons.

A) newton second per square meter

B) coulomb

C) joule per kilogram per Kelvin

D) watt per meter per degree celcius

A) M. Schleiden

B) T. Schwann

C) Rudolf Virchow

D) J. E. Purkinje