p-Block Element...

Consider the following statements regarding the B-F bond in BF₃.

(A) The strength and bond length of BF₃ may be explained on the basis of pπ-pπ interactions between boron and fluorine.
(B) BF₃ is highly soluble in water.
(C) All the three B-F bond lengths are equal and less than the sum of the covalent radii of boron and fluorine.
(D) The bond order of the B-F is 1.33.

The correct order of initials T (true) and F (false) for the above statements is

Consider the following statements about borax:

(a) It is used as a flux for soldering.
(b) It is used in making enamels and pottery glaze.
(c) It is used as a styptic to stop bleeding.
(d) It is used for making optical glasses.

Which of the following is not the use of borax?

Alum helps in purifying water by

Which of the following statements are correct?

(A) Diborane is a coloured gas and stable at low temperature.
(B) The members of B_nH_n+6 series are less stable than those of B_nH_n+4 series.
(C) The reaction of diborane with oxygen is endothermic in nature.
(D) It has banana bonds.

A solid element 'X' is a good conductor of electricity and forms two chlorides - XCl_n (a colourless volatile liquid) and XCl_{n - 2} (a colourless solid). To which group of periodic table does the element 'X' belong?