Problem 72
The false statement among the following is (1) Electron affinity of noble gases is almost zero. (2) The halogen with highest electron affinity is fluorine. (3) Electron affinity values are obtained indirectly by Born-Haber Cycle. (4) lonisation potential of Na would be numerically the same as electron affinity of \(\mathrm{Na}^{+}\).
Problem 74
The process requiring absorption of energy is (1) \(\mathrm{F} \rightarrow \mathrm{F}^{-}\) (2) \(\mathrm{H} \rightarrow \mathrm{H}^{-}\) (3) \(\mathrm{Cl} \rightarrow \mathrm{Cl}^{-}\) (4) \(0 \rightarrow O^{2-}\)
Problem 75
Arrange \(0, S\) and Se in the increasing order of their electron affinity. (1) \(\mathrm{Se}<\mathrm{S}<\mathrm{O}\) (2) \(\mathrm{O}<\mathrm{Se}<\mathrm{S}\) (3) \(\mathrm{S}<\mathrm{O}<\mathrm{Se}\) (4) \(\mathrm{S}<\mathrm{Se}<\mathrm{O}\)
Problem 77
The correct statement among the following is (1) Electron affinity of \(X^{-}\) ion is cqual to ionisation energy of \(X\) atom. (2) The sccond clectron gain cnthalpy is more than the first clectron gain enthalpy. (3) Among the metals gold has maximum clectron affinity. (4) Electron affinity of fluorine is more than that of chlorinc duc to lower size.
Problem 78
Which among the following statements is false? (1) Pauling electronegativity scale is based on the experimental value of bond energies. (2) Electronegativity is a measure of the capacity of an atom to attract shared pair of electrons. (3) The atom with high electronegativity generally has high ionisation potential. (4) The electronegativity difference between the atoms gives an idea about bond length.
Problem 79
The wrong statement among the following is (1) The element with outer electronic configuration \(n s^{2} n p^{5}\) is more electronegative. (2) The units of electronegativity are eV. (3) The element with higher electronegativity value may act as an oxidising agent. (4) The atom of an electronegative element becomes an ion by gaining electrons.
Problem 80
Pauling scale of electronegativity of elements helps to determine (1) covalent nature of an clement (2) position of an clement in EMF series (3) dipole moment of molecules (4) polarity of bond
Problem 81
Electronegativity of beryllium is approximately equal to that of (1) Aluminium (2) Boron (3) Magnesium (4) Sodium
Problem 83
The electronegativity of the following elements increases in the order (1) \(\mathrm{C}, \mathrm{N}, \mathrm{S} i, \mathrm{P}\) (2) \(\mathrm{N}, \mathrm{Si}, \mathrm{C}, \mathrm{P}\) (3) \(\mathrm{Si}, \mathrm{P}, \mathrm{C}, \mathrm{N}\) (4) \(\mathrm{P}, \mathrm{Si}, \mathrm{N}, \mathrm{C}\)
Problem 84
According to Mulliken, the electronegativity of an clement is the (1) Product of electron affinity and ionisation potential values (2) Difference of electron affinity and ionisation potential values (3) Sum of the electron affinity and ionisation potential values (4) Average of the electron affinity and ionisation potential values
