Question

Give the general method of preparation of N2 and it's type​

Answer 1

Answer:

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Answer 2

Explanation:

Preparation

1. commercially dinitrogen is produced by the liquifaction and fraction distilation method of air , when N2 distils the first .

2. Lab method ,:-

NH4CL (aq) + NaNO2 (aq) ---->N2(g) + 2H20(I) + Nacl(aq)

3.(NH4)3Cr2O7 ----------------->N2(g) + 4H20 + cr2O3

4 . Pure N2 can be obtained from sodium or barium azide .

Ba(N3)2---------->Ba+3N2

Properties :- Dinitrogen is a colourless , odourless , tasteless and non -toxic gas . it has two stable isotopes ;- 14N, 15N . it has very low solubility in water .

.Because high temperature, it directly combines with some metals to form largely ionic nitrides and with non - metals covalent nitrides .

6Li + N2 --Heat----> 2Li3N

3Mg + N2 ----Heat------>Mg3N2

Haber's process

N2 + 3H2 (g) --773K-------->2NH3 (g)

∆f ° H = -45.1KJ mol^-1

N2(g) + O2 (g) ----Heat------> 2NO(g)

Uses:-

(1) Manufacture of NH3 and calcium cyanamide

(2) To create an inert atmosphere

(3) Liquid N2 is used as refrigerant

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