19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
From B₂H₆, all the following can be prepared except:
What are X and Y in the reaction ? heat 3B H 6X 3[BH (X) ] [BH ] Y 12H + - + ® ¾¾¾® +
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?
Na B O X H BO . + ® What is X in the reaction ?
Thermite is a mixture of iron oxide and
Which of the following is correct?
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 ?
Na₂B₄O₇.10H₂O is correctly represented as:
Which one is the wrong statement ?
Which one of the following oxides is neutral ?
Darkening of surface painted with white lead is due to (CPMT 2009)
The structure of diborane (B₂H₆) contains :
In B₂H₆:
On hydroloysis, diborane produces
Borazole, B₃N₃H₆ is related to benzene as:
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:
Boric acid has a polymeric layer structure in which planar BO₃ units are joined by
Which of the following compounds is known as inor- ganic benzene?
Which of the following compounds are formed when BCl₃ is treated with water ?
The geometry of a complex species can be understood from the knowledge of type of hybridisation of orbitals of central atom. The hybridisation of orbitals of central atom in [B(OH)₄]– and the geometry of the complex a…
Which is the hardest compound of boron ?