pBlock ElementsII - Result Question 123

####8. The compound that does not produce nitrogen gas by the thermal decomposition is

(2018 Main)

(a) Ba(N3)2

(c) NH4NO2

(b) (NH4)2Cr2O7

(d) (NH4)2SO4

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Solution:

  1. The thermal decomposition of given compounds is shown below

(NH4)2Cr2O7ΔN2+4H2O+Cr2O3 NH4NO2ΔN2+2H2O (NH4)2SO4Δ2NH3+H2SO4 Ba(N3)2Ba+3N2

Thus, only (NH4)2SO4 does not gives N2 on heating (It give NH3 ). While rest of the given compounds gives N2 on their thermal decomposition.



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