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Standard VIII

Chemistry

Change of State

P + 5HNO3 → H...

Question

$P + 5 H N O_{3} \to H_{3} P O_{4} + H_{2} O + 5 N O_{2}$
What would be the volume of steam produced from 6.2 g of phosphorus at $S T P$ ?
$[H = 1; N = 14; O = 16; P = 31]$

11.25 L

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22.4 L

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112.5 L

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4.48 L

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Solution

The correct option is D 4.48 L
Atomic weight of P = 31 g
We know that 31 g of $P$ will give 22.4 lit $H_{2} O$ .
Therefore, 6.2 g of $P$ will give $= \frac{22.4}{31} \times 6.2 = 4.48 L H_{2} O$ .

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Similar questions

9.3 g of phosphorous was taken in the reaction shown:

P + 5 H N O_{3} ⟶ H_{3} P O_{4} + H_{2} O + 5 N O_{2}

Calculate the volume of

N O_{2}

produced at S.T.P..

[

H

= 1,

N

= 14,

P

= 31,

O

= 16]

Q. Concentrate nitric acid oxidises phosphorus to phosphoric acid according to the following equation:

P + 5 H N O_{3} (c o n c .) \to H_{3} P O_{4} + H_{2} O + 5 N O_{2}

9.3 g

of phosphorus was used in the reaction, calculate:
The volume of nitrogen dioxide produced at

S T P

[H = 1, N = 14, P = 31, O = 16]

9.3 g of phosphorous was used in the reaction shown.

P + 5 H N O_{3} ⟶ H_{3} P O_{4} + H_{2} O + 5 N O_{2}

Calculate the number of moles of phosphorus taken.

P + 5 H N O_{3} \to H_{3} P O_{4} + H_{2} O + 5 N O_{2}

The mass of phosphoric acid that can be prepared from 6.2 g of phosphorous and the mass of

H N O_{3}

that will be consumed at the same time is respectively :

(a) Concentrated nitric acid oxidises phosphorus to phosphoric acid according to the following equation:
P + 5HNO₃ $\overset{}{\to}$ H₃PO₄ + H₂O + 5NO₂
(i) What mass of phosphoric acid can be prepared from 6.2 g of phosphorus?
(ii) What mass of nitric acid will be consumed at the same time?
(iii) What will be the volume of steam at the same time measured at 760 mm Hg pressure and 373°C? (H = 1; N = 14; O = 16; P = 31)

(b) Ammonia may be oxidised to nitrogen monoxide in the presence of a catalyst according to the following equation:
4NH₃ + 5O₂ $\overset{}{\to}$ 4NO + 6H₂O
If 27 litres of reactants are consumed, what volume of nitrogen monoxide is produced at the same temperature and pressure?

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P+5HNO3→H3PO4+H2O+5NO2What would be the volume of steam produced from 6.2 g of phosphorus at STP ?[H=1;N=14;O=16;P=31]

The correct option is D 4.48 LAtomic weight of P = 31 gWe know that 31 g of P will give 22.4 lit H2O.Therefore, 6.2 g of P will give =22.431×6.2=4.48L H2O.

$P + 5 H N O_{3} \to H_{3} P O_{4} + H_{2} O + 5 N O_{2}$
What would be the volume of steam produced from 6.2 g of phosphorus at $S T P$ ?
$[H = 1; N = 14; O = 16; P = 31]$

The correct option is D 4.48 L
Atomic weight of P = 31 g
We know that 31 g of $P$ will give 22.4 lit $H_{2} O$ .
Therefore, 6.2 g of $P$ will give $= \frac{22.4}{31} \times 6.2 = 4.48 L H_{2} O$ .