19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Diborane reacts with ammonia under different conditions to give a variety of products. Which one among the following is not fomed in these conditions?
From B₂H₆, all the following can be prepared except:
What are X and Y in the reaction ? heat 3B H 6X 3[BH (X) ] [BH ] Y 12H + - + ® ¾¾¾® +
Which of the following is correct?
Alumina is:
Which is not a method of preparing carbon monoxide on a commercial scale ? (a) 473 1273 K (s) (g) (g) 2(g) C H O CO H - + ¾¾¾¾¾® + (b) 1273 K (s) 2(g) 2(g) (g) 2(g) 2C O 4N 2CO 4N + + ¾¾¾® + (c) (g) (s) 2(g) 2C O 2CO …
Na B O X H BO . + ® What is X in the reaction ?
The main factor responsible for weak acidic nature of B—F bonds in BF₃ is:
Match the column I with column II and mark the appropriate choice. Column I Column II (A) Galena (i) Abrasive (B) Diamond (ii) Metal carbonyls (C) Carbon monoxide (iii) Hydrides of Si (D) Silanes (iv) An ore of lead
The power of halides of boron to act as Lewis acids decreases in the order:
BCl₃ does not exist as a dimer but BH₃ exists as B₂H₆ because
The reaction which is not involved in thermite process: (a) 3Mn O 8Al 9Mn 4Al O + ¾¾® + (b) Cr O 2Al 2Cr Al O + ¾¾® + (c) 2Fe Al O Fe O 2Al + ¾¾® + (d) B O 2Al 2B Al O + ¾¾® +
Which of the following is a false statement ?
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…
Boron cannot form which one of the following anions? (a) BF⁻ (b) BH⁻
Which one of the following is the correct statement ?
Which of the following is not matched correctly with its use ?
Na₂B₄O₇.10H₂O is correctly represented as:
Anodised aluminium is :
The structure of diborane (B₂H₆) contains :
The correct order of atomic radii in group 13 elements is (NEET 2018)
In B₂H₆:
On hydroloysis, diborane produces
Which of the following compounds is used in cosmetic surgery? (Odisha NEET 2019)
Borazole, B₃N₃H₆ is related to benzene as: