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Byju's Answer

Standard XII

Chemistry

Nitric Acid

When concentr...

Question

When concentrated nitric acid is heated, it decomposes to give________.

O_{2}

and

N_{2}

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N_{2} O_{5}

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N O_{2}

and

O_{2}

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Solution

The correct option is E $N O_{2}$ and $O_{2}$
When conc. nitric acid is subjected to thermal or light decomposition, it gives nitrogen dioxide and oxygen.
$4 H N O_{3} \to 2 H_{2} O + 4 N O_{2} + O_{2}$

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Similar questions

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:

Q. In the formation of nitric acid,

N_{2}

and

O_{2}

are made to combine. Which of the following condition will favour the formation of

N O

N_{2} + O_{2} ⇌ 2 N O + H e a t

Choose the correct answer :

(a) The nitrate salt which does not give a mixture of $N O_{2}$ and $O_{2}$ on heating is :

(i) $A g N O_{3}$ , (ii) $K N O_{3}$ ,

(iii) $C u (N O_{3})_{3}$ , (iv) $Z n (N O_{3})_{2}$ .

(b) The chemical used in the brown ring test is :

(i) $C u S O_{4}$ , (ii) $F e S O_{4}$

(iii) $F e_{2} (S O_{4})_{3}$ (iv) $Z n S O_{4}$ .

(i) NO, (ii) $N_{2} O,$

(iii) $N O_{2}$ (iv) $N_{2} O_{5}$ .

Q. When

N_{2} O_{5}

is heated at temp. T, it dissociates as

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

. At the same time

N_{2} O_{3} ⇌ N_{2} O + O_{2}

. If initially 4.0 moles of

N_{2} O_{5}

are taken in 1.0 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:

Q. When

N H_{4} N O_{2}

and

N H_{4} N O_{3}

are heated, gaseous products obtained are:

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When concentrated nitric acid is heated, it decomposes to give________.

The correct option is E NO2 and O2When conc. nitric acid is subjected to thermal or light decomposition, it gives nitrogen dioxide and oxygen.4HNO3→2H2O+4NO2+O2

The correct option is E $N O_{2}$ and $O_{2}$
When conc. nitric acid is subjected to thermal or light decomposition, it gives nitrogen dioxide and oxygen.
$4 H N O_{3} \to 2 H_{2} O + 4 N O_{2} + O_{2}$