In Dumas method for the estimation of N 2, the sample is heated with copper oxide and the gas evolved is passed over :

Question

In Dumas method for the estimation of N 2, the sample is heated with copper oxide and the gas evolved is passed over : (A) Copper gauze (B) Pd (C) Ni (D) Copper oxide

Tardigrade Admin · Accepted Answer

Duma's method.
The nitrogen containing organic compound, when heated with

C u O

in a atmosphere of

C O_{2}

, yields free

N_{2}

in addition to

C O_{2}

and

H_{2} O

.

C_{x} H_{y} N_{z} + (2 x + \frac{y}{2}) C u O \to

x C O_{2} + \frac{y}{2} H_{2} O + \frac{z}{2} N_{2} + (2 x + \frac{y}{2}) C u

Traces of nitrogen oxides formed, if any, are reduced to nitrogen by passing the gaseous mixture over heated copper gauze.

Q. In Dumas method for the estimation of $N_{2}$ , the sample is heated with copper oxide and the gas evolved is passed over :

Copper gauze

$P d$

$N i$

Copper oxide

Q. In Dumas method for the estimation of N2​, the sample is heated with copper oxide and the gas evolved is passed over :

Copper gauze

Pd

Ni

Copper oxide

Q. In Dumas method for the estimation of $N_{2}$ , the sample is heated with copper oxide and the gas evolved is passed over :

$P d$

$N i$