19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
In B₂H₆:
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…
Boric acid has a polymeric layer structure in which planar BO₃ units are joined by
On hydroloysis, diborane produces
The structure of diborane (B₂H₆) contains :
Boron cannot form which one of the following anions? (a) BF⁻ (b) BH⁻
The number of OH units directly linked to boron atoms in Na₂B₄O₇.10H₂O is:
What happens when a mixture of cobalt oxide and borax is heated in a flame on a loop of platinum wire ?
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…
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 is the hardest compound of boron ?
H₃BO₃ is:
Which one of the following is the correct statement ?
Which of the following compounds are formed when BCl₃ is treated with water ?
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 - ?
Which one of the following statements regarding BF₃ is not correct?
Glass and cement are two important examples of
Which of the following does not show similarity between boron and aluminium ?
BF₃ is used as catalyst in several industrial processes due to its:
Which of the following compounds are formed when boron trichloride is treated with water?
The main factor responsible for weak acidic nature of B—F bonds in BF₃ is:
When aluminium hydroxide dissolves in NaOH solution, the product is:
Identify X and Y in the following reaction. NaBH 140ºC C H Cl BCl NH Cl X Y + ¾¾¾¾® ¾¾¾¾®
Borax bead test is responded by:
Which of the following hydroxides is acidic ?