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Hydrides of Nitrogen

Which of the ...

Question

Which of the following oxides of nitrogen is solid at or below 273 K?

A

N O_{2}

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B

N_{2} O_{3}

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C

N_{2} O

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D

N_{2} O_{5}

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Solution

The correct option is D $N_{2} O_{5}$
$N_{2} O_{5}$ exists as colourless solid below 273 K. Above this temperature it starts decomposing.
$N_{2} O_{5} \to 2 N O_{2} + 1 / 2 O_{2}$

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Q. The nitrogen oxides that contain N – N bond(s) is:

Nitrogen forms largest oxides as it is capable of forming stable multiple bonds with oxygen. They range from

N_{2} O

(O.S of nitrogen +1) through

N O, N_{2} O_{3}, N_{2} O_{4}

N_{2} O_{5}

(O.S of nitrogen +5).

The following points are important regarding the oxides of nitrogen.

(a) All oxides of nitrogen except

N_{2} O_{5}

are endothermic because large amount of energy is required to dissociate the stable molecule of oxygen and nitrogen.

(b) The small electronegativity difference between oxygen and nitrogen makes N-O bond easily breakable to give oxygen and hence oxides of nitrogen are said to be better oxidizing agents.

N_{2} O_{5}

, all are gases at ordinary temperature.

N_{2} O_{3}

is stable only at a lower temperature (253 K).

N_{2} O

N O

which are neutral oxides, all are acidic oxides that dissolve in water forming corresponding oxyacids.

(e) They are also a good example of illustrating the concept of resonance.

The gas which is acidic in nature is ________.

N_{2} O_{3}

exists only in the solid state at low temperature. Above its melting point, it dissociates to

Q. Arrange the following in the order of increasing oxidation number of nitrogen:

N H_{3}, N_{3} H, N_{2} O, N O, N_{2} O_{5}

The valency of Nitrogen in the following is?

NO, NO2,N2O3

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