19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Heating an aqueous solution of aluminium chloride to dryness will give
Alumina may be converted into anhydrous aluminium chloride by:
The incorrect statement regarding above reactions is:
Select the true statements: (i) The formula of the corundum is Al2O3. (ii) The formula of cryolite is Na3AlF6. (iii) The formula of borax is Na2B4O7.10H2O (iv) The formula of bauxite is Al2O3.H2O
Na B O X H BO . + ® What is X in the reaction ?
Which of the statement is true for the above sequence of reactions?
Boric acid is used in carrom boards for smooth gliding of pawns because:
Which of the following is a false statement ?
The power of halides of boron to act as Lewis acids decreases in the order:
The main factor responsible for weak acidic nature of B—F bonds in BF3 is:
BCl3 does not exist as a dimer but BH3 exists as B2H6 because
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
Borax bead test is responded by:
The number of OH units directly linked to boron atoms in Na2B4O7.10H2O is: