When copper metal is treated with cold and dilute nitric acid, it forms

  • A
    $NO$
  • B
    $N_2O$
  • C
    $N_2O_5$
  • D
    $NO_3$

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The most common minerals of phosphorus are

The number of $H$ atoms directly attached to the $P$ atom in hypophosphorous acid is:

The oxidation number of phosphorus varies from

The products formed by complete hydrolysis of $PCl_3$ are

Assertion $(A)$: In group $15$ elements, nitrogen does not form pentahalides.
Reason $(R)$: Nitrogen can exhibit $+5$ oxidation state.
The correct option among the following is:

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