Which of the following is used as a lubricant?
1 Graphite
2 Silica
3 Diamond
4 Iron oxide
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difference between ancient age,middle age & modern age.
The property of a substance to absorb moisture from the air on exposure is called 1 Osmosis 2 Dessication 3 Efflorescence 4 Deliquescence
Which of the following substances exhibit the property of sublimation? 1 Ice 2 Wax 3 Camphor 4 Ethyl alcohol
what is the force that helping the earth to revolve by its own.
what does the haversian central canal in each osteon contains?
describe the function of muscles
Which of the following colors in he visible spectrum has maximum range? 1 Violet 2 Indigo 3 Orange 4 Red
it is not advisable to sleep under a tree at night becouse trees release
Which of the following acids is used for ‘etching glass’? 1 HBrO3 2 H2F2 3 HCIO4 4 HIO4
iS ELEMENT IRON RADIOACTIVE AND WHY?
Soap is a mixture of sodium or potassium salts of 1 Monocarboxylic acids 2 Glycerol’s 3 Dicarboxylic acids 4 Tricarboxylic acids
Which scientist made detailed study on novae?