Chemistry Browning of paper in old books is caused by Collection of dust Oxidation of cellulose Frequent use Lack of aeration Collection of dust Oxidation of cellulose Frequent use Lack of aeration ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ultra purification of a metal is done by : Zone melting Smelting Slugging Leaching Zone melting Smelting Slugging Leaching ANSWER DOWNLOAD EXAMIANS APP
Chemistry Milk tastes sour when it is left in open for some time. This happens due to the formation of Lactic acid Carbonic acid Acetic acid Citric acid Lactic acid Carbonic acid Acetic acid Citric acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry The term 'brown air' is used for Acid fumes Sulphurous smog Industrial smog Photochemical smog Acid fumes Sulphurous smog Industrial smog Photochemical smog ANSWER DOWNLOAD EXAMIANS APP
Chemistry When iron rusts, its weight Increases First increases and then decreases Decreases Remains the same Increases First increases and then decreases Decreases Remains the same ANSWER DOWNLOAD EXAMIANS APP
Chemistry When cathode rays strike a target of high atomic weight, they give rise to X-rays Positive rays ? and ? rays ?-rays X-rays Positive rays ? and ? rays ?-rays ANSWER DOWNLOAD EXAMIANS APP
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