A mixture of salt and sand can be separated by
1 Sublimation
2 Dissolving in water
3 Gravity separation
4 Dry distillation
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Quartz crystals normally used in quartz clocks etc. is chemically 1 Sodium silicate 2 Germanium oxide 3 Silicon dioxide 4 None of these
what is the force that helping the earth to revolve by its own.
Which of the following characteristics is not-shown by hydrogen? 1 It burns in air to form water 2 It supports combustion 3 It combines with almost all the metals forming hydrides 4 None of these
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
The element required for solar energy conversion is 1 Germanium 2 Silicon 3 Uranium 4 None of these
The metallic constituents of hard water are 1 Magnesium, calcium and tin 2 Iron, tin and calcium 3 Calcium, ,magnesium and iron 4 None of these
WHAT IS AMBER
What is voltage? ?? What type of of show voltage. ?? Practillay how's voltage?
Explain the Aesthetic and Moral values of Science
0 Answers Mahatma Gandhi University,
What is the Genetics?
The wavelength of X-ray is of order of 1 1 cm 2 1m 3 1 Angstrom 4 10 micron
Which of the following substances undergoes chemical change on heating? 1 Sodium chloride 2 Silica 3 Lead nitrate 4 Platinum wire