Which of the following is a chemical change?
1 Magnetization of iron
2 Melting of ice
3 Burning of sulphur
4 Melting of wax
What are the aluminium alloys that you supply?
The element required for solar energy conversion is 1 Germanium 2 Silicon 3 Uranium 4 None of these
What is the work of a patent engineer? Does the experience in working as patent engineer helps in finding a job in a refinery?
Which is the most famous comet?
precautions to be observed while using electrical equipment
the river tigris in which city
Which of the following elements is not-radioactive? 1 Uranium 2 Thorium 3 Plutonium 4 zirconium
The dark lines in the solar spectrum are due to 1 Absorption of corresponding wavelengths by the prism used in he spectrograph 2 Destructive interference between waves of certain definite wavelengths 3 Absorption of corresponding wavelengths by the outer layers of the sun 4 None of these
Which of the following is not a bleaching agent? 1 Sulphur dioxide 2 Carbon dioxide 3 Sodium hypochlorite 4 Chlorine
What is the Botany?
Which of the following is used as a lubricant? 1 Graphite 2 Silica 3 Diamond 4 Iron oxide
Marsh gas is 1 Hydrogen 2 Nitrogen 3 Methane 4 Ethane