19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Boron nitride can be represented by the given structure. The structure of BN is similar to
The bonds present in borazole are:
Which of the following compounds is known as inor- ganic benzene?
Borazole, B3N3H6 is related to benzene as:
In B2H6:
The structure of diborane (B2H6) contains :
In diborane, the two H – B – H angles are nearly :
The type of hybridization of boron in diborane is
In diborane,
On hydroloysis, diborane produces
Boric acid has a polymeric layer structure in which planar BO3 units are joined by
Boric acid is prepared from borax by the action of :
An aqueous solution of boric acid is found to be weakly acidic in nature. This acidic character arises due to the following reasons.
H3BO3 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:
What happens when a mixture of cobalt oxide and borax is heated in a flame on a loop of platinum wire ?
Which of the following compounds are formed when BCl3 is treated with water ?
Which of the following is the electron deficient molecule ?
Which is the hardest compound of boron ?
Borax is not used
Which is not the use of orthoboric acid ?
Which of the following statements about anhydrous alu- minium chloride is correct?
A gas other than HCl is obtained in : (a) Silent electric discharge BCl + H ¾¾¾¾¾® (b) LiAlH + BF ®
Identify X and Y in the following reaction. NaBH 140ºC C H Cl BCl NH Cl X Y + ¾¾¾¾® ¾¾¾¾®
The hardest substance is