In diborane, the two H — B — H angles are nearly
60º, 120º
95º, 120º
95º, 150º
120ºº, 180ºº
Which of the following statement is correct about Group 13 elements?
They form only compounds
They form only covalent compounds
They form only co-ordinate compounds
They form both ionic and covalent compounds
The elements of Group 14
Form M4+ ions
Form M4- and M4+ ions
Exhibit oxidation state of +4
Exhibit oxidation states of +4 and +2
Which of the following is not a characteristic of carbon?
Catenation
Multiple bond formation
Availability of d-orbitals for bonding
Highest electronegativity in the Group
Catenation is a process for the formation of
Cations
Ionic compound
Covalent compound
Long chains of identical atoms
Boron behaves as a
Metal
Metalloid
Non-metal
Transition metal
PbF4 and PbCl4 exist, but PbBr4 and PbI4 do not exist, because of
Large size of Br- and I-
Low electronegativity of Br- and I-
Strong reducing character of Pb4+
Strong oxidising character of Pb4+
Which of the following statement is correct with respect to the property of elements with increase in atomic no. in the carbon family?
Their atomic size decreases
Their metallic character decreases
Their ionisation potential increases
Stability of +2 oxidation state increases
