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:
Which of the statement is true for the above sequence of reactions?
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:
Diborane reacts with ammonia under different conditions to give a variety of products. Which one among the following is not fomed in these conditions?
Which of the following will be formed, if we heat an aqueous solution of AlCl₃ to dryness ?
The members of group 14 form tetrahalides of the type MX4. Which of the following halides cannot be readily hydrolysed by water ?
Boric acid is used in carrom boards for smooth gliding of pawns because:
Which one of the following is the correct statement ?
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
BCl₃ does not exist as a dimer but BH₃ exists as B₂H₆ because
Boron cannot form which one of the following anions? (a) BF⁻ (b) BH⁻
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® +
The main factor responsible for weak acidic nature of B—F bonds in BF₃ is:
Borazole, B₃N₃H₆ is related to benzene as:
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…
Which of the following is not matched correctly with its use ?
The power of halides of boron to act as Lewis acids decreases in the order:
Anodised aluminium is :
Boric acid has a polymeric layer structure in which planar BO₃ units are joined by
The correct order of atomic radii in group 13 elements is (NEET 2018)
On hydroloysis, diborane produces
H₃BO₃ is:
Which of the following compounds is used in cosmetic surgery? (Odisha NEET 2019)
The structure of diborane (B₂H₆) contains :