How is Hydrogen stored physically ?

SO₂ pollution is indicated by

Which one among the following pairs of compound and chemical formula is NOT correctly matched?

If 1/14 gram of N₂ has 'n' molecules, how many molecules are present in 46 gm NO₂?

The formula of baking soda is :

During chemical weathering when minerals in feldspar change to kaolinite clays the process is termed as: