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3. Write about the reaction of nitrogen with non-metals., , Nitrogen reacts with non-metals like hydrogen, oxygen etc., at high, temperature to form their corresponding nitrogen conipounds., Non-metal + Nitrogen 4, Nitrogen compound, , Example, 3H, + N, 4. 2NH; |, Hydrogen Nitrogen Ammonia, , 4. What is global warming?, , The increased greenhouse effect is caused due to increase in the air, pollutants and it results in the average increase of temperature of the, atmosphere. This is called as Global warming., , 5. What is dry ice? What are its uses?, , 1. Solid carbon dioxide, called as dry ice is used as a refrigerant., 2. The gas is so cold that moisture in the air condenses on it., creating a dense fog which is used in stage shows and movie effects.