3 y 1. The most prevalent noble gas in our atmosphere is A) helium. B) neon argo

Question

3 y 1. The most prevalent noble gas in our atmosphere is A) helium. B) neon argon. D) krypton E) xenon. 2. The Com content of Earth's atmosphere is approximately 4% 0.04% (400 ppm) C) 0.4% (4000 ppm) D) 0.004% (40 ppm) E) 4 ppm which one of the following reactions is an example of nitrogen fixation? A N10s(g) Nos (g) NO2 (g) N2(g) O2 (g) 2NO(g) E) 2NH (g) 3H2(aq) N20g) One of the steps in the fixation of nitrogen by lightening is given belo In this reaction, is the element nitrogen oxidized or reduced? A) Nitrogen is oxidized in this reaction. B) Nitrogen is reduced in this reaction. C Nitrogen is oxidized and reduced in this reaction. D) itrogen is neither oxidized nor reduced in this reaction. which of the following reactions associated with nitrogen fixation by lightening is a disproportionation reaction? L N20g) O2(g) 2NO(g) II. 2NO(g) O2(g) 2No.(g) A) I, II, and III B) and III C) I and II D) I and III CE III only Page I

Explanation / Answer

Which one of the following reactions is an example of nitrogen fixation?

A. N2O5(g) ® NO3(g) + NO2(g)
B. N2(g) + O2(g) ® 2NO(g)-------------answer
C. 3NO2(g) + H2O(l) ® 2HNO3(aq) + NO(g)
D. 2NO(g) + O2(g) ® 2NO2(g)
E. 2NH3(g) ® 3H2(aq) + N2(g)

nitrogen fixation : the concoction forms by which environmental nitrogen is absorbed into natural mixes, particularly by specific microorganisms as a major aspect of the nitrogen cycle.

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One of the steps in the fixation of nitrogen by lightening is given below.?

2NO2(g) + H2O(l) ® HNO2(aq) + HNO3(aq)

In this reaction, is the element nitrogen oxidized or reduced?


Nitrogen is oxidized in this reaction.
Nitrogen is reduced in this reaction.
Nitrogen is oxidized and reduced in this reaction. -----answer

Nitrogen is neither oxidized nor reduced in this reaction

Nitrogen in the following

Oxidation number

Reactant

NO2

+IV

products side

HNO2

+III --------reduced

HNO2

+V ----------------oxidized

In NO2 the oxidation number of nitrogen is +4 and then on the products side in HNO2 it's +3 (reduced) and in HNO3 it's +5 (oxidised).

From equation and Oxidation number

2NO2(g) + H2O(l) ® HNO2(aq) + HNO3(aq)

It can concluded that Nitrogen is oxidized and reduced in reaction. -----answer

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Which of the following reaction associated with nitrogen fixation by lightening disproportionation reaction

ii2NO(g) + O2(g) ® 2NO2(g)

Iii, 2NO2(g) + H2O(l) ® HNO2(aq) + HNO3(aq)

Option B

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Nitrogen in the following

Oxidation number

Reactant

NO2

+IV

products side

HNO2

+III --------reduced

HNO2

+V ----------------oxidized

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