19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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?
Boric acid has a polymeric layer structure in which planar BO₃ units are joined by
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
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 ?
Identify X and Y in the following reaction. NaBH 140ºC C H Cl BCl NH Cl X Y + ¾¾¾¾® ¾¾¾¾®
Which of the following statements about anhydrous alu- minium chloride is correct?
Which is the hardest compound of boron ?
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:
Which of the following does not show similarity between boron and aluminium ?
The exhibition of highest co-ordination number depends on the availability of vacant orbitals in the central atom. Which of the following elements is not likely to act as central atom in MF - ?
When aluminium hydroxide dissolves in NaOH solution, the product is:
The correct order of atomic radii in group 13 elements is (NEET 2018)
Which one of the following statements regarding BF₃ is not correct?
BF₃ is used as catalyst in several industrial processes due to its:
H₃BO₃ is: