MCQ
The highest first ionisation energy among the following elements.
- A$\ce{Cs}$
- ✓$\ce{Cl}$
- C$\ce{I}$
- D$\ce{Li}$
✓
Answer
Correct option: B.
$\ce{Cl}$
The first ionisation energy of nonmetals is very high and as we move down the group, it decreases so $\ce{Cl}$ have highest first ionisation energy among all.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The hydrocarbon obtained by treating sodium ethanoate with soda lime is $ ..........$
→$Xe{F_6}$ is
→If the nitrogen atom had electronic configuration $1s^7,$ it would have energy lower than of the normal ground state configuration $1s^2 ,2s^2 ,2 p^3$ because the electron would be closer to the nucleus. Yet $1s^7$ is not observed because it violates
→${H_2} + \frac{1}{2}{O_2} \to {H_2}O;\,\Delta H = - 68.39\,kcal$
→$K + {H_2}O + $Water $ \to KOH(aq) + \frac{1}{2}{H_2};\,\Delta H = - 48\,kcal$
$KOH + $Water $ \to KOH(aq);\,\Delta H = - 14\,kcal$
The heat of formation of $KOH$ is (in kcal)
In the reaction$C{O_2}(g) + {H_2}(g) \to CO(g) + {H_2}O(g);\,\Delta H = 80\,kJ$$\Delta H$ is known as
→Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following :
In which of the following compounds, $H-$ bonding is strongest in the liquid phase?
→Which expression is correct for the work done in adiabatic reversible expansion of an ideal gas
The acidic buffer $(HX + NaX)$ can be best used to maintain the $pH$ in the range $(4 -6)$ then find $pk_b$ of $X^-$
→A hypothetical electromagnetic wave is show below.
→(Image)
The frequency of the wave is $\mathrm{x} \times 10^{19} \mathrm{~Hz}$. $x=$ . . . . (nearest integer)