Why is ice wrapped in gunny sacks to prevent it from melting
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The filament of an electric bulb is made of 1 Iron 2 Nichrome 3 tungsten 4 Graphite
9 Answers Germanium, Google, Graphite India, Tungsten,
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Please can someone tell me, how many times during a 12 hour period, do the hands of a clock face opposite each other? I believe its 11. Also, would this be the same, no matter WHAT the starting time? i.e. if the 12 hour period started at 6 o clock, would it still be 11 times? Many thanks for your help.
Which of the following is a chemical change? 1 Magnetization of iron 2 Melting of ice 3 Burning of sulphur 4 Melting of wax
The element required for solar energy conversion is 1 Germanium 2 Silicon 3 Uranium 4 None of these
Water is a compound because 1 It exists as a solid, a liquid or a gas 2 It contains hydrogen and oxygen 3 It contains two different elements joined by chemical bonds 4 It cannot be split up into simpler substances by chemical means
If today is Saturday what day will it be from 500 days?
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
A moderator is used in nuclear reactors in order to 1 Increase the number of neutrons 2 Decrease the number of neutrons 3 Slow down the speed of neutrons 4 Accelerate the neutrons
Which of the following materials are used for preparing blur-black ink? 1 Gallic acid 2 Tannic acid 3 Ferrous sulphate 4 All of these
Epoxy resins are used as 1 Moth repellants 2 Insecticides 3 Detergents 4 Adhesives
WHY WE SMELL A SCENT AFTER RAIN?? BUT RAIN WATER IS PUREST FORM OF WATER WHICH IS ODOURLESS.