19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Boron cannot form which one of the following anions? (a) BF⁻ (b) BH⁻
Na B O X H BO . + ® What is X in the reaction ?
Which of the following ions is the most stable ?
An aqueous solution of boric acid is found to be weakly acidic in nature. This acidic character arises due to the following reasons.
From B₂H₆, all the following can be prepared except:
Which of the following statements is correct regarding the behaviour of white phosphorus?
The percentage of p-character in the orbitals forming P–P bonds in P₄ is:
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
Ammonia, on reaction with excess of chlorine, gives :
Which of the following oxides of nitrogen is solid?
The reaction between urea and nitrous acid produces
Mg (NH₄)PO₄ and Na(NH₄) HPO₄ are heated separately. Which of the following statements is/are completely incorrect regarding the product obtained in the above process? (I) Same gas is evolved (II) Same type of phosphat…
Ammonia gas can be dried by
White phosphorus is kept under
N₂ is commercially prepared by
Which of the following reactions is used in the preparation of N₂?
Which of the following forms strong p - p bonding
Small quantities of very pure N₂ is obtained by carefully warming
Which of the following gases is the least reactive?
Which of the following compounds does not give N₂ on heating?
White phosphorus is more reactive than N₂ because
The reaction of P₄ with X leads selectively to P₄O₆. The X is:
Which one of the following compounds is most explosive?
Which of the following is the increasing order of enthalpy of vaporization?