19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration ? (NEET 2017)
The main factor responsible for weak acidic nature of B—F bonds in BF₃ is:
Which of the following compounds is known as inor- ganic benzene?
The power of halides of boron to act as Lewis acids decreases in the order:
What are X and Y in the reaction ? heat 3B H 6X 3[BH (X) ] [BH ] Y 12H + - + ® ¾¾¾® +
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 correct order of atomic radii in group 13 elements is (NEET 2018)
Boric acid has a polymeric layer structure in which planar BO₃ units are joined by
Borax is used as a cleansing agent because on dissolving in water, it gives (RPMT 2010)
On hydroloysis, diborane produces
H₃BO₃ is:
Graphite is a good conductor of electricity. Its electrical conductivity is due to the fact that (CPMT 2010)
The structure of diborane (B₂H₆) contains :
The number of OH units directly linked to boron atoms in Na₂B₄O₇.10H₂O is:
What happens when a mixture of cobalt oxide and borax is heated in a flame on a loop of platinum wire ?
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 stability of +1 oxidation state increases in the sequence (AIPMT 2009)
In B₂H₆:
Which of the following is not attacked by hot sodium hydroxide solution? (Manipal 2010)
Which is the hardest compound of boron ?
Which of the following is the electron deficient molecule ?
Which of the following compounds are formed when BCl₃ is treated with water ?
Which of the following statements about anhydrous alu- minium chloride is correct?
Borazole, B₃N₃H₆ is related to benzene as:
Which of the following is correct?