The element which is essential in nitrogen fixation is

  • A
    Zinc
  • B
    Copper
  • C
    Molybdenum
  • D
    Boron

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What is a $p$-block element? Discuss the gaseous elements and metallic properties of $p$-block elements.

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The $P-P-P$ bond angle in white phosphorus is

$Cu +$ conc. $HNO_3$ (hot) $\rightarrow Cu(NO_3)_2 + X$ (oxide of nitrogen);
then $X$ is

When orthophosphoric acid is heated to $600\,^oC$,it forms .................. .

What is the product of the reaction between $HNO_3$ and $P_4O_{10}$?

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