On heating ammonium dichromate and barium azide separately we get

A brown ring is formed in the ring test for NO₃

– ion. It is due to the formation of

Elements of group-15 form compounds in +5 oxidation state. However, bismuth forms only one well characterisedcompound in +5 oxidation state. The compound is

In the preparation of HNO₃, we get NO gas by catalytic oxidation of ammonia. The moles of NO produced by the oxidation of two moles of NH₃ will be ______.

The oxidation state of central atom in the anion of compound NaH₂PO₂ will be ______.