In an atomic nucleus, neutrons and protons are held together by
1 Gravitational forces
2 Magnetic forces
3 Exchange force
4 Coulombic forces
why is it important that sex cells have half the number of Chromosomes as body cells?
In which of the following processes, is vanadium pent oxide used as a catalyst? 1 Contact process 2 Haber’s process 3 Solvay process 4 None of these
Chemical formula for water glass is 1 Na2Sio3 2 Al2O3 3 NaA1O2 4 CaSiO3
The Contact Process is involved in the manufacture of 1 Nitric acid 2 Sulphuric acid 3 Ammonia 4 Caustic soda
The element required for solar energy conversion is 1 Germanium 2 Silicon 3 Uranium 4 None of these
What is the Organic Evolution ?
When a person sends a message to someone with the Internet, there are steps that happen to the recipient to receive the message. How does the recipient know that the message was not edited by someone else?
Why we use nhexane inplace of hexane in mobilepase preparation
Which of the following metals can displace hydrogen from dilute acids? 1 Zinc 2 Gold 3 Copper 4 Silver
What are pulsars?
NO OF PLANT IN ONGC
Which of the following is used as a lubricant? 1 Graphite 2 Silica 3 Diamond 4 Iron oxide