19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
From B2H6, all the following can be prepared except:
o o Re d hot 100 C 160 C H BO X Y B O ; ¾¾¾® ¾¾¾® ¾¾¾® X and Y respectively are:
Which one of the following is the correct statement ?
The hardest compound of boron is:
Boron cannot form which one of the following anions? (a) BF- (b) BH-
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 Al2F…
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 ?
Borax bead test is responded by:
The number of OH units directly linked to boron atoms in Na2B4O7.10H2O is:
In BX3, B – X distance is shorter than what is expected theoretically because (X = F, Cl, Br, I)