Chemistry Which type of radiations are absorbed by the upper layer of the atmosphere? Visible Radio-waves Infrared Ultraviolet Visible Radio-waves Infrared Ultraviolet ANSWER DOWNLOAD EXAMIANS APP
Chemistry Commercial nitric acid is coloured because it contains dissolved : Oxygen Coloured impurities Nitrous oxide Nitrogen dioxide Oxygen Coloured impurities Nitrous oxide Nitrogen dioxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Why is water not suitable for putting out a petrol fire ? Water, being heavy, slips below petrol which thus remains in contact with air and burns The oxygen content of water is isolated by petrol and thus it helps in burning The heat required for combustion of petrol is very low Petrol is too inflammable to be extinguished by water Water, being heavy, slips below petrol which thus remains in contact with air and burns The oxygen content of water is isolated by petrol and thus it helps in burning The heat required for combustion of petrol is very low Petrol is too inflammable to be extinguished by water ANSWER DOWNLOAD EXAMIANS APP
Chemistry 'Atomic theory' of matter was given by Avogadro Pascal Dalton Newton Avogadro Pascal Dalton Newton ANSWER DOWNLOAD EXAMIANS APP
Chemistry Who developed Hydrogen Bomb? Edward Teller Wernher Von Braun Samuel Cohen J. Robert Oppen Heimer Edward Teller Wernher Von Braun Samuel Cohen J. Robert Oppen Heimer ANSWER DOWNLOAD EXAMIANS APP
Chemistry Number of6.023 × 1020 atoms present in one mole of a gas at STP is '6.023 × 10–23 6.023 × 1020 6.023 × 1023 '6.023 × 10–20 '6.023 × 10–23 6.023 × 1020 6.023 × 1023 '6.023 × 10–20 ANSWER DOWNLOAD EXAMIANS APP
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