Deuterium differs from Hydrogen in having:
A. Different atomic number but same atomic weight
B. Different atomic number and different atomic weight
C. Same atomic number and different atomic weight
D. None
The chemical name of quartz is:
A. Silicon dioxide
B. Stannous oxide
C. Aluminium oxide
D. None
The atmosphere of moon consists of______________?
A. 90% hydrogen, 10% nitrogen
B. 80%nitrogen, 20% hydrogen
C. 60% nitrogen, 40%inert gases
D. None
Albatros is__________?
A. A sea bird
B. A beetle
C. A fruit
D. None
Who proposed this concept “All motion is relative”?
A. Albert einstein
B. John kepler
C. Galileo galilie
D. None
Coulomb is the scientific unit to measure?
A. Velocity
B. Temperature
C. Mass
D. None of these