Chemistry Browning of paper in old books is caused by Lack of aeration Frequent use Collection of dust Oxidation of cellulose Lack of aeration Frequent use Collection of dust Oxidation of cellulose ANSWER DOWNLOAD EXAMIANS APP
Chemistry Catalyst is a substance which None of these Has no action on the rate of the reaction Decreases the rate of reaction Increases the rate of the reaction None of these Has no action on the rate of the reaction Decreases the rate of reaction Increases the rate of the reaction ANSWER DOWNLOAD EXAMIANS APP
Chemistry When quick lime is added to water No heat change takes place Heat is absorbed Temperature decreases Heat is liberated No heat change takes place Heat is absorbed Temperature decreases 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 ? Krypton Helium Neon Argon Krypton Helium Neon Argon ANSWER DOWNLOAD EXAMIANS APP
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