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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 |
Answer» Correct Answer - 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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