50 Questions around this concept.
On heating, lead (II) nitrate gives a brown gas (A). The gas (A) on cooling changes to colourless soild/liquid (B). (B) on heating with NO changes to a blue soild (C). The oxidation number of nitrogen in solid (C) is:
Which one of the following acids does not exhibit optical isomerism ?
Among the oxides of nitrogen : $\mathrm{N}_2 \mathrm{O}_{3,} \mathrm{~N}_2 \mathrm{O}_4$ and $\mathrm{N}_2 \mathrm{O}_5$ ; the molecule(s) having nitrogen-nitrogen bond is/are :
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The reaction of zinc with dilute and concentrated nitric acid, respectively, produces :
"A" obtained by Ostwald's method involving air oxidation of upon further air oxidation produces "B". "B" on hydration forms an oxoacid of Nitrogen along with evolution of "A". The oxoacid also produces "A" and gives positive brown ring test. Identify A and B, respectively.
Which compound is manufactured by Ostwald process:
Which gases are used as a starting material in Birkland-Eyde process?
Which of the following acids disproportionates:
Which oxide of nitrogen is formed when zinc reacts with dilute HNO3
Oxidation state of 'N' in hydrazine is :
Nitrogen forms a number of oxides in different oxidation states. The names, formulas, preparation and physical appearance of these oxides are given in Table given below.

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