19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
What are X and Y in the reaction ? heat 3B H 6X 3[BH (X) ] [BH ] Y 12H + - + ® ¾¾¾® +
Which of the statement is true for the above sequence of reactions?
Which of the following is correct?
Na B O X H BO . + ® What is X in the reaction ?
Alumina is:
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:
BCl₃ does not exist as a dimer but BH₃ exists as B₂H₆ because
Which of the following is a false statement ?
NaBH₄ + I₂ ® X + Y + Z BF₃ + NaH 450 K ¾¾¾® X + P BF₃ + LiAlH₄ ® X + Q + R X, Y, Z, P, Q and R in the reactions are X Y Z P Q R (a) Na₄B₄O₇ NaI HI HF LiF AlF₃ (b) B₂H₆ NaI H₂ NaF LiF AlF₃ (c) B₂H₆ BH₃ NaI B₃N₃H₆ Al₂F₆…
Boron cannot form which one of the following anions? (a) BF⁻ (b) BH⁻
Which one of the following is the correct statement ?
Na₂B₄O₇.10H₂O is correctly represented as:
The structure of diborane (B₂H₆) contains :
In B₂H₆:
On hydroloysis, diborane produces
Borazole, B₃N₃H₆ is related to benzene as:
Which of the following compounds is known as inor- ganic benzene?
Boric acid is used in carrom boards for smooth gliding of pawns because:
Boric acid has a polymeric layer structure in which planar BO₃ units are joined by
Alumina is:
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 of the following is the electron deficient molecule ?
The number of OH units directly linked to boron atoms in Na₂B₄O₇.10H₂O is: