The period and group numbers of the element having maximum electronegativity in the long form of periodic table respectively, are
2,17
3,17
1,18
2,16
$\mathrm{XeO}_3, \mathrm{SF}_4$
$\mathrm{BrF}_5, \mathrm{PF}_5$
$\mathrm{ClF}_3, \mathrm{SF}_4$
$\mathrm{PCl}_3, \mathrm{NH}_3$
Identify the set containing isoelectronic species
$\mathrm{N}_2, \mathrm{O}_2^{2-}, \mathrm{NO}^{+}$
$\mathrm{N}_2, \mathrm{CO}, \mathrm{NO}^{+}$
$\mathrm{F}_2, \mathrm{O}_2^{2-}, \mathrm{N}_2$
$\mathrm{N}_2, \mathrm{O}_2^{2+}, \mathrm{C}_2$
Choose the incorrect statement from the following.
At Boyle temperature a real gas obeys ideal gas law over an appreciable range of pressure.
Critical temperature of $\mathrm{CO}_2$ is $27.5^{\circ} \mathrm{C}$.
Above critical temperature, a real gas behaves like an ideal gas.
At room temperature and 1 atm pressure the compressibility factor $(Z)$ for $\mathrm{H}_2$ gas is greater than 1 .
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