Who developed primary blue print programme?
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What is length and weight of arihant?
What are soaps? 1 Salts of silicates 2 Esters of heavy fatty acids 3 Sodium or potassium salts of heavier fatty acids 4 Mixture of glycerol and alcohols
How can we determine the no: of revolutions of earth around sun?
Diamond is harder than graphite because of 1 Difference of layers of atoms 2 Tetrahedral structure of diamond 3 Difference of crystalline structures 4 None of these
The first synthetic fiber made by man was 1 Rayon 2 Nylon 3 Polyester 4 Terycott
Brass gets discolored in air because of the presence of which of the following gases in air? 1 Carbon dioxide 2 Oxygen 3 Hydrogen sulphide 4 Nitrogen
The property of a substance to absorb moisture from the air on exposure is called 1 Osmosis 2 Dessication 3 Efflorescence 4 Deliquescence
Which synthetic fiber possesses a ‘drip-dry’ property? 1 Rayon 2 Nylon 3 Silk 4 Terylene
The metal that is present in photo films is 1 Mercury 2 Platimnum 3 Magnesium 4 Silver
Which of the following is used for removing air bubbles from glass during its manufacture? 1 Feldspar 2 Arsenious oxide 3 Potassium carbonate 4 Soda ash
what are the advantages and disadvantages of empirical knowledge?
In modern science, what is 'fourth dimension'?