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Q49) Ammonia compound which on heating does not give NH3 [ Roorkee 1993]




SOLUTION

NH4NO2 → N2 + 2H2O
Answer: (c)


Q50) Which of the following is metaphosphoric acid? [ J and K CET 2002]




SOLUTION

Metaphosphoric acid is (HPO3)n hence H3P3O9
Answer: (a)


Q51) Among the trihalides of nitrogen which one is most basic? [ Punjab CET 1997]



SOLUTION

Basic strength of nitrogen trihalides follows the order
NF3 < NCl3 < NBr3 < NI3
Answer:(c)



Q52) N forms NCl3 whereas P can form PCl3 and PCl5 why? [ Orissa JEE 2004]



SOLUTION


Answer: (a)


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