Chemistry Question Bank

The percentage of p-character in the orbitals forming P–P bonds in P₄ is:

White phosphorus is more reactive than N₂ because

The reaction of P₄ with X leads selectively to P₄O₆. The X is:

Platinum reacts with aqua regia to produce chloroplatinic acid represented by the formula

On boiling phosphorus with KOH solution, product formed is

The true statement for the acids of phosphorus, H₃PO₂, H₃PO₃ and H₃PO₄ is

White phosphorus is kept under

Which of the following reactions gives reasonably pure NO?

At present, HNO₃ is industrially prepared by the

Liquid N₂O₄ self-ionizes as

Phosphorus reacts with concentrated HNO₃ to produce

FeSO₄ is a very good absorber for NO. The number of unpaired electrons in the new compound formed by this process is

Which of the following complexes is responsible for the brown colour of the ring formed in the ring test for the nitrates? (a)[Fe(CN)₅NO]3+ (b)[Fe(H₂O)₄NO]2+NO⁺

Iodine reacts with concentrated HNO₃ to produce

Which of the following oxides of nitrogen is a mixed anhydride of two acids?

Ammonia, on reaction with excess of chlorine, gives :

A solution of sodium in liquid ammonia is blue due to the presence of

In NO ion, the number of bond pairs and lone pair of electrons on nitrogen atom are

Which of the following oxides of nitrogen is solid?

Gold reacts with aqua regia forming

Which of the following oxoacids of phosphorus is a reducing agent and a monobasic acid as well?

In which of the following species, S-atom assumes sp3 hybrid state? (I) SO₃ (II) SO₂ (III) H₂S (IV) S₈

Which of the following oxides is the most acidic?

An aqueous solution of ammonia consists of

Among the following compounds of nitrogen and hydrogen, the most acidic compound is