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Bakelite:
It is thermosetting plastics which are most widely used and the most important plastics.
Preparation:
It is formed by condensation reaction of phenol and formaldehyde.
Properties:
1. It possesses outstanding electrical and mechanical properties.
2. It is resistant to heat, water and many chemicals.
3. It decomposes by concentrated caustic alkalis, sulphuric acid and nitric acid.
Uses:
1. Uses for making switch boards, aircraft accessories, automobile and telephone.
2. Asbestos is added to increase resistance to heat and chemicals. Moulded sheets having many uses are made by impregnating paper sheets in resins.
(a) Given the values below, calculate the concentration of benzoyl peroxide required to prepare polystyrene with a number average molar mass of 400,000 by bulk free radical polymer
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This of the following occurs when two hydrogen atoms bond with each others: (1) Potential energy is lowered (2) Kinetic energy is lowered (3) Electronic motion ceases
Q. Consumption of marine oils results in: Consumption of marine oils result in decrease in plasma lipids by reduced synthesis of fatty acids and low density lipoproteins.
what is the modern purpose of this reaction?
Two kg Ammonia (mA) at P A = 300 kPa and T A = -10ºC and 1 kg Ammonia (m B ) at P B = 300 kPa and T B = 100ºC are mixed in a constant pressure and adiabatic process. Find th
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given the mobility of hydrogen ion and cl to be 0.0000003623 and 0.0000000791 respectively. calculate the transference number of proton in the 0.001M solution of hydrocholric acid
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