Chemistry Which substance is used to retard the setting action of cement? Al2O3 CaSO4, 2H2O Na2O + K2O CaO Al2O3 CaSO4, 2H2O Na2O + K2O CaO ANSWER DOWNLOAD EXAMIANS APP
Chemistry The acid which fails to liberate carbon dioxide from sodium bicarbonate is : Sulphuric acid Acetic acid Formic acid Carbonic acid Sulphuric acid Acetic acid Formic acid Carbonic acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry The atomic number of carbon is 6 and its atomic mass is 12. How many are there protons in the nucleus of carbon ? Zero 6 18 12 Zero 6 18 12 ANSWER DOWNLOAD EXAMIANS APP
Chemistry The reaction intermediate formed during the preparation of diethylether from ethanol by treatment with H2SO4 is Carbocation Carbanion Carbene Free radical Carbocation Carbanion Carbene Free radical ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following is extensively used for sterilizing water ? Borax powder Alum Soda powder Bleaching powder Borax powder Alum Soda powder Bleaching powder ANSWER DOWNLOAD EXAMIANS APP
Chemistry The main active constituent of tea and coffee is nicotine aspirin caffeine chlorophyll nicotine aspirin caffeine chlorophyll ANSWER DOWNLOAD EXAMIANS APP
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