A. the minimum amount of fissile material required in nuclear reactor
B. a large number of citizens who appear opposed to the policies of the ruling party
C. the absolutely minimum amount of mass in a substance
D. none of the above

A. proton
B. atom
C. molecule
D. electron

A. chemicals of soap change
B. it increases surface tension of the solution.
C. it absorbs dirt
D. it lowers the surface tension of the solution

A. John Napier
B. Alfred Nobel
C. Volta
D. Jean Picard

A. bad material used
B. liquid being very hot
C. poor workmanship
D. uneven expansion

A. a metal but in liquid form
B. liquid at room temperature
C. extremely sensitive to temperature variations
D. rarely available
E. Both a, b & C

A. similar charges of electricity rush towards each other
B. opposite charges in different clouds break down the resistance offered by the intervening air
C. clouds strike against impurities in air and result in a gigantic frictional flare-up
D. earth exerts a pull on the floating clouds

A. activated by man
B. naturally activated
C. chemically activated
D. absolutely inactivated

A. a negative charge
B. a positive charge
C. no charge
D. both the charges

A. Boyle’s law
B. Charles’ law
C. Archimedes principle
D. None of above