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Classify the following as amorphous or c...

Classify the following as amorphous or crystalline solids: polyurethane, naphtalene, benzoic acid, teflon, potassium nitrate, cellophane, polyvinyl chloride, fibre glass, copper.

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amorphos : polyurethane, teflon, cellophane, polyvinyl chloride, crystalline : naphthalene, benzoic acid, potassium nitrate, fibre glass, copper
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Classify the following as amorphous or crystalline solids: Polyurethane, naphthalene, benzoic acid, teflon, potassium nitrate, cellophane, polyvinyl chloride, fibre glass, copper.

Classify the following as amorphous or crystalline solids : Polyurethane, naphthalene, benzoic acid, teflon, potassium nitrate, cellophane, polyvinyl chloride, fibre glass and copper.

Knowledge Check

  • An organic base (X) reacts with nitrous acid at 0^(@)C to give a clear solution. Heating the solution with KCN and cuprous cyanide followed by continued heating with conc. HCl gives a crystalline solid. Heating this solid with alkaline potassium permanganate gives a compound which dehydrates on heating to a crystalline solid. "X" is :

    A
    B
    C
    D

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    Classify the following as amorphous or crystalline solids: Polyurethane, naphthalene, benzoic acid , teflon , potassium niturate, cellophone, polyvinyl chloride , fibre glass, copper.

    Classify the following solids into amorphous or crystalline solids. Bakelite, Platinum , Camphor , Oxalic acid , Melamine formaldehyde, Alum , Neoprene, Sugar , Solid CO_2 , Polythene.

    How many among the following are purely synthetic polymers? Nylon, teflon, nucleic acid, bakelite, terylene, polyethylene, wool and polyvinyl chloride.

    How do you count for the following observations ? (a) Though alkaline potassium permanganate and acidic potassium permanganate both are used as oxidants, yet in the manufacture of benzoic acid from toluene we use alcoholic potassium permanganate as an oxidant. Why ? Write a balanced redox equation for the reaction. (b) When concentrated sulphuric acid is added to an inorganic mixture containing chloride, we get colourless pungent smelling gas HCl, but if the mixture contains bromide then we get red vapour of bromine. Why ?

    How do you count for the following observations ? (a) Though alkaline potassium permanganate and acidic potassium permanaganate both are used as oxidatns yet in the manufacture of benzoic acid from tolurene we use alcoholic ptoassum permanganate as an oxidant why write a balaced redox equation for the reaction (b) When concentrated suphuric acid is added to an inorganic mixutre containing chloride we get pungent smelling gas HCI but if the mixture contains bromide then we get red vapour of bromine why?

    How do you count for the following observations ? (a) Though alkaline potassium permanganate and acidic potassium permanaganate both are used as oxidatns yet in the manufacture of benzoic acid from tolurene we use alcoholic ptoassum permanganate as an oxidant why write a balaced redox equation for the reaction (b) When concentrated suphuric acid is added to an inorganic mixutre containing chloride we get pungent smelling gas HCI but if the mixture contains bromide then we get red vapour of bromine why?

    Write the formulae of salts given below: Potassium sulphate, sodium sulphate, calcium sulphate, magnesium sulphate, copper sulphate, sodium chloride, sodium nitrate, sodium carbonate, ammonium carbonate and ammonium chloride. Identify the acids and bases from which the above salts may be obtained .How many families can you identify among these salts?

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