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Which of the following reactions is used...

Which of the following reactions is used in the preparation of `N_(2)(g)`?

A

`(NH_(4))_(2)Cr_(2)O_(7)overset("heat")(rarr)`

B

`NH_(3)+Ca(OCl)_(2)overset("heat")(rarr)`

C

`NH_(4)Cl+NaNO_(2)overset("heat")(rarr)`

D

All of these

Text Solution

Verified by Experts

The correct Answer is:
4
A cylinder of `N_(2)`is th eusual source of `N_(2)`in the laboratory ,but in the laboratory ,dinitorgen is prepared by warming a concentrated solution of a ammonium nitrite made in situ from ammonium chloride and sodium nitrite until it decomposes:
`NH_(4)Cl+NaNO_(3)rarrNaCl+NH_(4)NO_(2)overset("warm")rarrN_(2)+2H_(2)O`
it can also be obtained by the thermal decomposition fo ammonium dischromate:
`(NH_(4))_(2)Cr_(2)O_(7)overset(Delta)rarrN_(2)+4H_(2)O+Cr_(2)O_(3)`
`N_(2)` is also obtained by oxidizing `NH_(3)`with calcium hypocholrite.
`4NH_(3)+3Ca(OCl)_(2)rarr2N_(2)+3CaCl_(2)+6H_(2)O`
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Knowledge Check

  • Which of the following reaction(s) is/are used in the preparation of N_(2) ?

    A
    `NH_(4)CI+NaNO_(2) overset("heat")`
    B
    `(NH_(4))_(2)Cr_(2)O_(7) overset("heat")rarr`
    C
    `NH_(4)CI+NaNO_(3) overset("heat")`
    D
    `NaN_(3)overset("heat")rarr`

  • Stephens reaction is used in the preparation of

    A
    Carboxylic acids
    B
    Ketones
    C
    Alcohols
    D
    Aldehydes

  • Which of the following reactions are used in the preparation of alcohols ?

    A
    `CH_(3)CH_(2)Br+aq. KOH rarr`
    B
    C
    D
    `CH_(3)CH_(2)Cloverset(H_(2)O)rarr`

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