19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Na B O X H BO . + ® What is X in the reaction ?
Diborane reacts with ammonia under different conditions to give a variety of products. Which one among the following is not fomed in these conditions?
Na₂B₄O₇.10H₂O is correctly represented as:
Boric acid is used in carrom boards for smooth gliding of pawns because:
Which of the statement is true for the above sequence of reactions?
Reactivity of borazole is higher than that of benzene because:
What are X and Y in the reaction ? heat 3B H 6X 3[BH (X) ] [BH ] Y 12H + - + ® ¾¾¾® +
BCl₃ does not exist as a dimer but BH₃ exists as B₂H₆ because
The main factor responsible for weak acidic nature of B—F bonds in BF₃ is:
The power of halides of boron to act as Lewis acids decreases in the order:
Which of the following is a false statement ?
Which of the following is correct?
All members of group 14 when heated in oxygen form oxides. Which of the following is the correct trend of oxides ?
Which amont the following is not a borane? (AMU 2009)
On hydroloysis, diborane produces
The structure of diborane (B₂H₆) contains :
Boric acid has a polymeric layer structure in which planar BO₃ units are joined by
In B₂H₆:
What happens when a mixture of cobalt oxide and borax is heated in a flame on a loop of platinum wire ?
Boric acid H₃BO₃ and BF₃ have the same number of elec- trons. The former is a solid and the latter is a gas. The reason is:
H₃BO₃ is:
Borazole, B₃N₃H₆ is related to benzene as:
Which of the following is the electron deficient molecule ?
Which of the following compounds are formed when BCl₃ is treated with water ?
Which is the hardest compound of boron ?