Sodium carbonate is produced by _________ ?
A. haber process
B. decons process
C. Amonia solvay process
D. lead chamber process
EVERYDAY SCIENCE
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Covalent network crystals have _________ ?
A. . hydrogen bonding
B. lower melting point then molecular crystals
C. discrete molecules linked by Van der waals forces
D. higher melting point then molecular crystals
What is a mixture of Potassium Nitrate Powdered Charcoal and Sulphur called ?
A. Paint
B. Gun Powder
C. Glaass
D. Cement
Diameter of an atom is in the order of __________ ?
A. 0.2nm
B. 0.2mm
C. 0.2am
D. 0.2pm
Electron was discovered by ?
A. Michael Faraday
B. J.J Thomson
C. Yuri Gagarin
D. James Maxwell
Radioactive isotope of hydrogen is called________?
A. protium
B. deuterium
C. tritium
D. ortho-hydrogen
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
Physics is one of the branches of___________?
A. Physical sciences
B. Biological sciences
C. Social science
D. Life sciences branch
Which is the outermost planet in the solar system?
A. Mercury
B. Pluto
C. Neptune
D. Uranus