Class 11ChemistryClassification of Elements and Periodicity in PropertiesMix Examples - Classification of Elements and Periodicity in Properties
DifficultWhich of the following statements is/are wrong?
- Avan der Waals' radius of iodine is more than its covalent radius
- BAll isoelectronic ions belong to same period of the periodic table
- C$I.E._1$ of $N$ is higher than that of $O$ while $I.E._2$ of $O$ is higher than that of $N$
- DThe electron affinity of $N$ is almost zero while that of $P$ is $74.3 \ kJ \ mol^{-1}$
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Similar Questions
Maximum number of electrons in the outermost shell of $s, p, d$,and $f$ block elements are respectively:
Medium
View SolutionWhich of the following statements are correct?
$(i)$ First ionisation enthalpy of $He < $ Second ionisation enthalpy of $Li$.
$(ii)$ $Li$ has the highest second ionisation enthalpy.
$(iii)$ All $d$-block elements are transition elements.
$(iv)$ The only alphabet not found in the periodic table is the letter '$J$'.
$(v)$ Francium concentration is $\sim 10^{-18} \ ppm$ on Earth.
$(i)$ First ionisation enthalpy of $He < $ Second ionisation enthalpy of $Li$.
$(ii)$ $Li$ has the highest second ionisation enthalpy.
$(iii)$ All $d$-block elements are transition elements.
$(iv)$ The only alphabet not found in the periodic table is the letter '$J$'.
$(v)$ Francium concentration is $\sim 10^{-18} \ ppm$ on Earth.
DifficultTS EAMCET 2018
View SolutionWhich element among the following is most probable to have the following values?
$\Delta_i H_1 = 419 \ kJ \ mol^{-1}$
$\Delta_i H_2 = 3051 \ kJ \ mol^{-1}$
$\Delta_{eg} H = -48 \ kJ \ mol^{-1}$
$\Delta_i H_1 = 419 \ kJ \ mol^{-1}$
$\Delta_i H_2 = 3051 \ kJ \ mol^{-1}$
$\Delta_{eg} H = -48 \ kJ \ mol^{-1}$
Which of the following is not correctly matched?
Medium
View SolutionIdentify the incorrect statement from the following:
MediumNEET 2026
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