19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Carbon shows a maximum covalency of four whereas other members can expand their covalence due to
The stability of +1 oxidation state increases in the se- quence:
White phosphorus is kept under
White phosphorus is more reactive than N₂ because
Iodine reacts with concentrated HNO₃ to produce
Gold reacts with aqua regia forming
Phosphorus reacts with concentrated HNO₃ to produce
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?
Which of the following oxides of nitrogen is a mixed anhydride of two acids?
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⁺
Liquid N₂O₄ self-ionizes as
Which of the following oxides of nitrogen is solid?
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 reactions gives reasonably pure NO?
Ammonia, on reaction with excess of chlorine, gives :
Ammonia gas can be dried by
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
At present, HNO₃ is industrially prepared by the
The percentage of p-character in the orbitals forming P–P bonds in P₄ is:
An aqueous solution of ammonia consists of
Which of the following oxides is the most acidic?
Which of the following gases is the least reactive?
Which of the following is the increasing order of enthalpy of vaporization?