Problem 91
When two species A and B form an electron pair bond and A does not provide its electrons for bonding, the bond present between \(\mathrm{A}\) and \(\mathrm{B}\) must be (1) ionie (2) covalent (3) dative (4) hydrogen
Problem 93
\(\mathrm{B} \mathrm{F}_{3}\) forms an adduct with \(\mathrm{NH}_{3}\) because (1) Nitrogen has high clectroncgativity. (2) Boron has high clectroncgativity. (3) Boron has an empty p-orbital and nitrogen has one lonc pair of clectrons. (4) Boron has clectropositive character.
Problem 94
Proton plays an important role in .......bonding. (1) electrovalent (2) hydrogen (3) covalent (4) coordinate
Problem 96
The type of bond formed during the hydration of cation is (1) ionic (2) covalent (3) electrostatic (4) dative bond
Problem 97
The bond order of a molecule is given by (1) Half the difference between number of bonding electrons and anti-bonding electrons. (2) The difference between the number of bonding electrons and anti-bonding electrons. (3) Twice the difference between the number of bonding electrons and anti- bonding electrons. (4) The total number of bonding electrons.
Problem 99
Bond order in the MO theory depends on the number of bonding electrons and anti-bonding electrons. The bond order (1) always has an integer value (2) can have only fractional valuc (3) is always equal to onc (4) can be zero, integral or fractional
Problem 102
Which of the following molecules do not exist? (1) \(\mathrm{II}_{2}\) (2) \(\mathrm{Bc}_{2}\) (3) \(\mathrm{C}_{2}\) (4) \(\mathrm{N}_{2}\)
Problem 103
Which one of the following molecule has the shortest bond length? (1) \(\mathrm{C}_{2}\) (2) \(\mathrm{O}_{2}\) (3) \(\mathrm{F}_{2}\) (4) \(\mathrm{N}_{2}\)
Problem 105
In which of the following pairs, both the species have the same bond order? (1) \(\mathrm{N}_{2}, \mathrm{~N}_{2}^{21}\) (2) \(\mathrm{O}_{2}, \mathrm{~F}_{2}\) (3) \(\mathrm{C}_{2}, \mathrm{O}_{2}\) (4) \(\mathrm{C}_{2}, \mathrm{~N}_{2}\)
Problem 106
In which set both species are paramagnetic? (1) \(\mathrm{B}_{2}, \mathrm{O}_{2}\) (2) \(\mathrm{N}_{2}, \mathrm{~T}_{2}\) (3) \(\mathrm{Be}_{2}, \mathrm{O}_{2}\) (4) \(\mathrm{N}_{2}, \mathrm{O}_{2}\)
