Which of the following metals react with nitrogen at room
temperature to form nitride?
1 Sodium
2 Potassium
3 Magnesium
4 None of these
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The inert gas which is substituted for nitrogen in the air, used by deep sea divers for breathing, is 1 Helium 2 Argon 3 Krypton 4 Xenon
An element that does not occur in nature but can be produced artificially is 1 Thorium 2 Radium 3 Plutonium 4 Uranium
Titanium is purified by 1 Zone refining 2 Electrolysis 3 Van Arkel method 4 Hydraulic washing
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2 Answers Competitive Exams, Stenographer,
The metal that is present in photo films is 1 Mercury 2 Platimnum 3 Magnesium 4 Silver
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A substance which changes readily into vapor without heating is called 1 Efflorescent 2 Synthetic 3 Volatile 4 Effervescent
exactly how does an RTD 3 wire or 4 wire device cancel out the resistance of the wires , opposed to a 2 wire RTD? Is it because you have resistors in parallel , or because something to do with the electronic circuit the RTD is connected to ?
Name the scientist who has been invited by the Srilankan Governement to have a Study on Employment development?
Soda-acid fire extinguisher involves the reaction between 1 Sodium hydroxide and nitric acid 2 Sodium bi carbonate and sulphuric acid 3 Sodium sulphate and carbonic acid 4 Sodium carbonate and hydrochloric acid
Caustic soda is 1 NaC1 2 Na2CO3 3 NaOH 4 NaHCO3
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