11. What happens when? a) Magnesium burns in air. b) Nitrogen and Hydrogen react with each other at high temperature and pressure. c) Hydrogen peroxide is decomposed in the presence of manganese dioxide. d) Potassium reacts with hydrochloric acid. Calcium carbonate reacts with hydrochloric acid. f) Potassium is kept in water. 12 aninh ty
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a)it reacts with oxygen found inthe air to form magenisum oxide
b)they form ammonia gas
c)Mno2 catalyzes the breakdown of H202 to H20 and 02 gas
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