19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which one is the wrong statement ?
BCl₃ does not exist as a dimer but BH₃ exists as B₂H₆ because
Which of the following is a false statement ?
The purest form of coal is
Identify the incorrect statement.
Boron cannot form which one of the following anions? (a) BF⁻ (b) BH⁻
Glass and cement are two important examples of
Which one of the following is the correct statement ?
Na₂B₄O₇.10H₂O is correctly represented as:
The structure of diborane (B₂H₆) contains :
In B₂H₆:
The hardest substance is
On hydroloysis, diborane produces
Borazole, B₃N₃H₆ is related to benzene as:
Buckminsterfullerence is
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:
In graphite, the layers of carbon atoms are held by
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?
Identify the wrong example from the following for the group 14 elements.
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…
Al₂O₃ formation from aluminium and oxygen involves evolution of a large quantity of heat, which makes alu- minium used in:
The number of OH units directly linked to boron atoms in Na₂B₄O₇.10H₂O is: