19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following statements is correct regarding the behaviour of white phosphorus?
The reaction of P₄ with X leads selectively to P₄O₆. The X is:
Which of the following elements can have both positive and negative oxidation states?
On boiling phosphorus with KOH solution, product formed is
The mixture of concentrated HCl and HNO₃ made in 3 : 1 ratio contains (AIIMS 2013)
In which of the following species, S-atom assumes sp3 hybrid state? (I) SO₃ (II) SO₂ (III) H₂S (IV) S₈
A gas that cannot be collected over water is
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
Ammonia gas can be dried by
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 oxides of nitrogen is solid?
Gold reacts with aqua regia forming
Which of the following reactions is used in the preparation of N₂?
Among the following compounds of nitrogen and hydrogen, the most acidic compound is
Which of the following oxides is the most acidic?