Chemical Reactivity
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The first (ΔiH1) and the second (ΔiH) ionization enthalpies (in kJ mol–1) and the (ΔegH) electron gain enthalpy (in kJ mol–1) of a few elements are given below:
Elements | ΔiH | ΔiH | ΔegH |
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 MX2, (X=halogen).
(f) the metal which can form a predominantly stable covalent halide of the formula MX (X=halogen)?
Basic Character increases down the group.
True
False
If x denoted the number of valence electrons of a representative element then its valence is equal to:
1) x-82) x
2) x
3) 8-x
4) Both option 2 and option 3
Dioxygen> Super oxide > Peroxide
Dioxygen> Peroxide > Super oxide
Super oxide > Peroxide >Dioxygen
Peroxide >Dioxygen> Super oxide
The electro negativity of group 14 elements are:
Same/equal as of group 13 elements
Slightly more than as of group 13 elements
Slightly less than as of group 13 elements
Similar as of group 13 elements
A lonization enthalpy
B Basicity of oxides
C Solubility of hydroxides
Which of the following formula does not correctly represent the bonding capacity of the atom involved