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The variety of coal in which the deposit contains
recognizable traces of the orginal plant material is
1 Anthracite
2 Lignite
3 Peat
4 Bitumen
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Carbon tetrachloride fire extinguisher should not be used in closed rooms, because it produces a poisonous gas called 1 Carbon monoxide 2 Phosphine 3 Phosgene 4 None of these
meron po bang minerals ang astoroids po ba?
Why is it necessary to cook food ?
Permanent hardness of water may be removed by the addition of 1 Alum 2 Sodium carbonate 3 Lime 4 Potassium permanganate
the basic approach to science was established by:
Which of the following is not a neutral oxide? 1 Carbon monoxide 2 Sulphur dioxide 3 Nitric oxide 4 Water
What are the divisions of food according to the functions it performs ? Describe them
Galvanized iron sheets have a coating of 1 Tin lead 2 Zinc 3 Chromium 4 Lead
In a fast breeder reactor, U-238 gets converted to 1 U-235 2 U-237 3 Co-60 4 Plutonium-239
why our head's weight not feel our body?
Explain how you can integrate Life skills in Science Teaching
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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
Biological Sciences 
