Question:

Pure nitrogen is prepared in the laboratory by heating a mixture of

Updated On: Apr 27, 2024
  • $NH_4OH + NaCI$
  • $NH_4N0_3 + NaCI$
  • $NH_4CI + NaOH$
  • $NH_4CI + NaNO_2$
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The Correct Option is D

Solution and Explanation

In the laboratory dinitrogen is prepared by
heating an aqueous solution containing an
equivalent amount of ammonium chloride and
sodium nitrite
$NH_4 CI(aq) + NaNO_2 (aq)\, \xrightarrow{Heat} \, N_2 (g) $
$ \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, + 2H_2O(I) + NacI$
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Concepts Used:

P-Block Elements

  • P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
  • P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.

P block elements consist of: