The first `(Delta_(i)H_(1)` and second `(Delta_(i)H_(2)` ionization enthalpies (in kJ/mol) and electron gain enthalpy (in kJ/mol) of few elements are given below:
`{:("Elements",Delta_(i)H_(1),Delta_(i)H_(2),Delta_(eg)H),(I,520,7300,-60),(II,1681,3374,-328),(III,899,1757,+48),(IV,2372,5251,+48):}`
Which of the following is likely to be an alkali metal?

The first (Delta_(i)H_(1)) and second (Delta_(i)H_(2)) ionisation enthalpies ("in" kJ mol^(-1)) and the (Delta_(eg)H^(ө)) electron gain enthalpy ("in" kJ mol^(-1)) of a few elements are given below: {:("Elements",(Delta_(i)H_(1)),(Delta_(i)H_(2)),Delta_(eg)H^(ө)),(I,520,7300,-60),(II,419,3051,-48),(III,1681,3374,-328),(IV,1008,1846,-295),(V,2372,5251,+48),(VI,738,1451,-40):} Which of the above elements is likely to be a. the least reactive element. b. the most reactive metal. c. the most reactive non-metal. d. the least reactive non-metal. e. the metal which can form a stable binary halide of the formula MX_2 (X=halogen). f. the metal which can form a predominantly stable covalent halide of the formula MX(X=halogen).

The first (Delta_(i)H_(1)) and second (Delta_(i)H_(2)) ionisation enthalpies ("in" kJ mol^(-1)) and the (Delta_(eg)H^(ө)) electron gain enthalpy ("in" kJ mol^(-1)) of a few elements are given below: {:("Elements",(Delta_(i)H_(1)),(Delta_(i)H_(2)),Delta_(eg)H^(ө)),(I,520,7300,-60),(II,419,3051,-48),(III,1681,3374,-328),(IV,1008,1846,-295),(V,2372,5251,+48),(VI,738,1451,-40):} Which of the above elements is likely to be a. the least reactive element. b. the most reactive metal. c. the most reactive non-metal. d. the least reactive non-metal. e. the metal which can form a stable binary halide of the formula MX (X=halogen). f. the metal which can form a predominantly stable covalent halide of the formula MX(X=halogen).

The first (Delta_iH_1) and the second (Delta_iH_2) ionisation enthalpies in "kJmol"^(-1) and the electron gain enthalpy (Delta_(eg)H) in "kJmol"^(-1) of a few elements are given below: {:("Elements",Delta_iH_1,Delta_iH_2,Delta_(eg)H),("(P)",520,7300,-60),("(Q)",419,3051,-48),("(R)",1681,3374,-328),("(S)",1008,1846,-295),("(T)",2372,5251,+48),("(U)",738,1451,-40):} Which one of the above elements is least reactive?

The first ( Delta_(i), H_(1) ) and the second ( Delta, H_(2) ) ionisation enthalpies (in kJ mo l^(- 1) ) and the (Delta_(eg)H ) electron gain enthalpy (in kJ mo l^(-1) ) of a few elements are given below : Which of the above elements is likely to be : a reactive metal

The first ( Delta_(i), H_(1) ) and the second ( Delta, H_(2) ) ionisation enthalpies (in kJ mo l^(- 1) ) and the (Delta_(eg)H ) electron gain enthalpy (in kJ mo l^(-1) ) of a few elements are given below : Which of the above elements is likely to be : the least reactive element?