A. Trade
B. Cyclonic
C. Monsoon
D. Polar (more…)
The Sun’s mass is mainly consist of which of the following?
A. Hydrogen
B. Nitrogen
C. Carbon dioxide
D. Silicon (more…)
‘Christian Friedrich Schönbein’ discovery is___________?
A. Ozone
B. Radium
C. Chlorine
D. Neutron
Weather describes the condition of ______ at anytime.
A. The earth
B. The land surface
C. The Atmosphere
D. The ionosphere (more…)
Which scientist discovered the radioactive element radium?
A. Isaac Newton
B. Albert Einstein
C. Benjamin Franklin
D. Marie Curie
Nail polish remover contains___________?
A. Acetone
B. Benzene
C. Acetic acid
D. Petroleum ether
The soul of chemistry is dealing with___________?
A. Internal structural changes in matter
B. Composition of matter
C. Properties of matter
D. Composition and properties of matter
Which of the following is the most toxic gas?
A. Carbon dioxide
B. Carbon monoxide
C. Nitrogen
D. Hydrogen
Radon is___________?
A. germon radio
B. radio active gas
C. artificial fibre
D. an explosive