1.

Which of the following compounds do not exist?N_(4), P_(4), PCI_(5), NCI_(3), P_(2)O_(5) ,NO_(2), PO_(2)

Answer»

`N_(4)` ,`NCI_(5)`, `NO_(2)`
 `N_(4)`, `NCI_(5)`, `PO_(2)`
 `PCI_(5)`, `NCII_(5)`, `PO_(2)`
All of these

Answer :B


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