19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The main factor responsible for weak acidic nature of B—F bonds in BF₃ is:
The power of halides of boron to act as Lewis acids decreases in the order:
Na B O X H BO . + ® What is X in the reaction ?
Which of the following compounds is known as inor- ganic benzene?
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…
Borazole, B₃N₃H₆ is related to benzene as:
Boron cannot form which one of the following anions? (a) BF⁻ (b) BH⁻
Which one of the following is the correct statement ?
From B₂H₆, all the following can be prepared except:
In B₂H₆:
AlCl₃ on hydrolysis gives:
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 ?
What happens when a mixture of cobalt oxide and borax is heated in a flame on a loop of platinum wire ?
Identify X and Y in the following reaction. NaBH 140ºC C H Cl BCl NH Cl X Y + ¾¾¾¾® ¾¾¾¾®
Which of the following statements about anhydrous alu- minium chloride is correct?
Which is the hardest compound of boron ?
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:
The exhibition of highest co-ordination number depends on the availability of vacant orbitals in the central atom. Which of the following elements is not likely to act as central atom in MF - ?
Which one of the following statements regarding BF₃ is not correct?
BF₃ is used as catalyst in several industrial processes due to its:
H₃BO₃ is:
Match the column I with column II and mark the appropriate choice. Column I Column II (A) Coal gas (i) CO + H₂ (B) Synthesis gas (ii) CH₄ (C) Producer gas (iii) H₂ + CH₄ + CO (D) Natural gas (iv) CO + N₂
The structure of diborane (B₂H₆) contains :