Lithium (Li) is the strongest reducing agent in the periodic table.
Who discovered the Gamma Rays?
A. Alfred Marshall
B. Paul Villard
C. Bohar
D. Jabar bin Hayan
Water is heated in a kettlE. The inside water is heated by convection. A person sitting near the fire receives heat by ________?
A. Conduction
B. Convection
C. Radiation
D. Reflection
E. None of these
Approximately, how many times each day do our heart valves open and close normally?
A. 10,000
B. 1,00,000
C. 1,50,000
D. 2,00,000
A. Sublimation of iodine
B. Heating a platinum wire in a Bunsen flame
C. Heating of mercuric oxide powder
D. Evaporation of alcohol
Vacuum tubes have been replaced by__________?
A. Conductors
B. Diodes
C. Transistors
D. None of these
A. Tungsten
B. Aluminium
C. Copper
D. Nickel