Chemical Process Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C. 15-30 250-300 90-100 15-30 250-300 90-100 ANSWER DOWNLOAD EXAMIANS APP
Chemical Process Chrome tanning and vegetable tanning are done for Neither light nor heavy leather Light & heavy leather respectively Heavy & light leather respectively Both light & heavy leather Neither light nor heavy leather Light & heavy leather respectively Heavy & light leather respectively Both light & heavy leather ANSWER DOWNLOAD EXAMIANS APP
Chemical Process Concentration of sulphide ores is done usually by Smelting Electro magnetic separation Froth floatation Roasting Smelting Electro magnetic separation Froth floatation Roasting ANSWER DOWNLOAD EXAMIANS APP
Chemical Process Impurities present in brine is normally removed by treatment with Lime and soda ash NH₃ and CO₂ All of these Lime, ammonia and carbon Lime and soda ash NH₃ and CO₂ All of these Lime, ammonia and carbon ANSWER DOWNLOAD EXAMIANS APP
Chemical Process Manufacture of phthalic anhydride uses __________ as a catalyst. Ni Al₂O₃ Cr V₂O₅ Ni Al₂O₃ Cr V₂O₅ ANSWER DOWNLOAD EXAMIANS APP
Chemical Process Fat splitting catalyst is CaCO₃ Al2O₃ Fe ZnO CaCO₃ Al2O₃ Fe ZnO ANSWER DOWNLOAD EXAMIANS APP
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