19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following is correct?
Na B O X H BO . + ® What is X in the reaction ?
Which one is the wrong statement ?
From B₂H₆, all the following can be prepared except:
Alumina is:
The power of halides of boron to act as Lewis acids decreases in the order:
Which of the following is a false statement ?
The main factor responsible for weak acidic nature of B—F bonds in BF₃ is:
Na₂B₄O₇.10H₂O is correctly represented as:
Boron cannot form which one of the following anions? (a) BF⁻ (b) BH⁻
Which one of the following is the correct statement ?
BCl₃ does not exist as a dimer but BH₃ exists as B₂H₆ because
Boric acid is used in carrom boards for smooth gliding of pawns because:
In B₂H₆:
Borazole, B₃N₃H₆ is related to benzene as:
The structure of diborane (B₂H₆) contains :
Which of the following compounds is known as inor- ganic benzene?
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…
Which of the statement is true for the above sequence of reactions?
On hydroloysis, diborane produces
Catenation i.e., linking of similar atoms depends on size and electronic configuration of atoms. The tendency of catenation in Group 14 elements follows the order
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…
The number of OH units directly linked to boron atoms in Na₂B₄O₇.10H₂O is:
Which of the following compounds are formed when BCl₃ is treated with water ?
What happens when a mixture of cobalt oxide and borax is heated in a flame on a loop of platinum wire ?