Multiple choice chemistry preparation of gases nitrogen gas component of air - nitrogen nitrogen Which of the following gives nitrogen on thermal decomposition? Ammonium nitrite Ammonia Ammonium dichromate Air Reveal answer Fill a bubble to check yourself A,C Correct answer Explanation $ { { (NH } _{ 2 }) } _{ 2 }{ Cr } _{ 2 }{ O } _{ 7 }\xrightarrow [ thermal\quad decomposition ]{ \Delta } { Cr } _{ 2 }{ O } _{ 3 }+{ N } _{ 2 }+4{ H } _{ 2 }O\ N{ H } _{ 4 }{ NO } _{ 2 }\xrightarrow [ thermal\quad decomposition ]{ \Delta } { N } _{ 2 }+2{ H } _{ 2 }O $ Ammonium nitrite and Ammonium dichromate both give nitrogen on thermal decomposition.