19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
A mixture of boron trichloride and hydrogen is subjected to silent electric discharge to form ‘A’ and HCl. ‘A’ is mixed with NH₃ and heated to 200 °C to form ‘B’. The formula of ‘B’ is:
Which of the following is correct?
Which of the statement is true for the above sequence of reactions?
Na B O X H BO . + ® What is X in the reaction ?
From B₂H₆, all the following can be prepared except:
Thermite is a mixture of iron oxide and
Which one is the wrong statement ?
The power of halides of boron to act as Lewis acids decreases in the order:
Which of the following is a false statement ?
Na₂B₄O₇.10H₂O is correctly represented as:
Boric acid is used in carrom boards for smooth gliding of pawns because:
Al₂O₃ formation from aluminium and oxygen involves evolution of a large quantity of heat, which makes alu- minium used in:
Which of the following oxides can act as a reducing agent ?
The main reason that SiCl₄ is easily hydrolyzed as compared to CCl₄ is that (Kerala CEE 2009)
In B₂H₆:
Borazole, B₃N₃H₆ is related to benzene as:
The structure of diborane (B₂H₆) contains :
Which of the following compounds is known as inor- ganic benzene?
H₃BO₃ is:
Boric acid has a polymeric layer structure in which planar BO₃ units are joined by
On hydroloysis, diborane produces
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…
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…
The number of OH units directly linked to boron atoms in Na₂B₄O₇.10H₂O is:
Which of the following compounds are formed when BCl₃ is treated with water ?