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