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Standard XII

Chemistry

Nitrous Oxide

Which oxide i...

Question

Which oxide is colourless and neutral ?

N_{2} O_{3}

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N_{2} O

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N_{2} O_{4}

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N_{2} O_{5}

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Solution

The correct option is B $N_{2} O$
$N_{2} O_{3}$ is a blue solid but other oxides are colourless. Among the others only $N_{2} O$ (nitrous oxide, also called laughing gas) Is neutral to litmus.

Note: Acidic character of oxides generally increases as the number of oxygen atom increases.

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Similar questions

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

Q. How many of the following compounds has XX bonds i.e. single covalent bond between two same elements in their molecules :

H_{2} S_{2} O_{4}, H_{2} S_{2} O_{7}, H_{2} S_{2} O_{8}, N_{2} O, N_{2} O_{3}, N_{2} O_{4}, N_{2} O_{5}, {(H P O_{3})}_{3}

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).

(d) Except

N_{2} O

and

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 ________.

Q. Anhydride of an acid is formed by dehydration and oxidation number of central atom remains unchanged.
Acid :

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

Anhydride :

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

Correct match of acid with its anhydride is

Q. When

N_{2} O_{5}

is heated at temperature T, it dissociates as

N_{2} O_{5} ⇌ N_{2} O_{3} + O_{2}, K_{e} = 2.5

. At the time

N_{2} O_{3}

also decomposes as:

N_{2} O_{3} ⇌ N_{2} O + O^{2}

. If initially

4

moles of

N_{2} O_{5}

are taken in

1

litre flask and allowed to attain equilibrium, concentration of

O_{2}

was formed to be

2.5 M

. Equilibrium concentration of

N_{2} O

is:

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Which oxide is colourless and neutral ?

The correct option is B N2ON2O3 is a blue solid but other oxides are colourless. Among the others only N2O (nitrous oxide, also called laughing gas) Is neutral to litmus. Note: Acidic character of oxides generally increases as the number of oxygen atom increases.

The correct option is B $N_{2} O$
$N_{2} O_{3}$ is a blue solid but other oxides are colourless. Among the others only $N_{2} O$ (nitrous oxide, also called laughing gas) Is neutral to litmus.

Note: Acidic character of oxides generally increases as the number of oxygen atom increases.