Chemistry Question Bank

White phosphorus reacts with concentrated HNO₃ to give

White phosphorus is kept under

White phosphorus is more reactive than N₂ because

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

Which of the following statements is correct regarding the behaviour of white phosphorus?

Phosphorus reacts with concentrated HNO₃ to produce

Iodine reacts with concentrated HNO₃ to produce

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

Gold reacts with aqua regia forming

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

Liquid N₂O₄ self-ionizes as

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⁺

Which of the following reactions gives reasonably pure NO?

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

The number of P–O–P bonds in the structure of phosphorus pentoxide and phosphorus trioxide are respectively (2005)

At present, HNO₃ is industrially prepared by the

Ammonia gas can be dried by

Ammonia, on reaction with excess of chlorine, gives :

Which of the following reactions is used in the preparation of N₂?

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

Which of the following gases is the least reactive?

Which of the following forms strong p - p bonding

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

N₂ is commercially prepared by

Which of the following is the increasing order of enthalpy of vaporization?