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 Catalyst is a substance which None of these Increases the rate of the reaction Has no action on the rate of the reaction Decreases the rate of reaction None of these Increases the rate of the reaction Has no action on the rate of the reaction Decreases the rate of reaction ANSWER DOWNLOAD EXAMIANS APP
Chemistry When quick lime is added to water Heat is absorbed Temperature decreases No heat change takes place Heat is liberated Heat is absorbed Temperature decreases No heat change takes place Heat is liberated ANSWER DOWNLOAD EXAMIANS APP
Chemistry What is the element that is in the highest percentage in the composition of the earth ? Iron Silicon Magnesium Oxygen Iron Silicon Magnesium Oxygen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which among the following is used to dilute oxygen in the gas cylinders used by divers ? Argon Helium Neon Krypton Argon Helium Neon Krypton ANSWER DOWNLOAD EXAMIANS APP
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