19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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
Which one of the following statements regarding BF3 is not correct?
BF3 is used as catalyst in several industrial processes due to its:
The decreasing order of power of boron halides to act as Lewis acids is (a) BF BCl BBr > > (b) BBr BCl BF > > (c) BCl BF BBr > > (d) BCl BBr BF > >
In BX3, B – X distance is shorter than what is expected theoretically because (X = F, Cl, Br, I)
Which is not the use of orthoboric acid ?
Borax is not used
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 one of the following is the correct statement ?
BCl3 does not exist as a dimer but BH3 exists as B2H6 because
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:
Which of the following is a false statement ?
Which of the following is not true regarding the nature of halides of boron ?
Na2B4O7.10H2O is correctly represented as:
In the structure of diborane
When strongly heated, orthoboric acid leaves a residue of:
o o Re d hot 100 C 160 C H BO X Y B O ; ¾¾¾® ¾¾¾® ¾¾¾® X and Y respectively are:
From B2H6, all the following can be prepared except:
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 200oC to form ‘B’. The formula of ‘B’ is:
When aluminium hydroxide dissolves in NaOH solution, the product is:
Which of the following does not show similarity between boron and aluminium ?
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 - ?