MCQ
The screening effect of $d$-electons is
- AEqual to that of $p$-electrons
- BMore than that of $p$-electrons
- ✓Less than $p$-electrons
- DSame as $f$-electrons
✓
Answer
Correct option: C.
Less than $p$-electrons
c
$(c)$ Screening effect of $d$ and $f$ block elements is nearly same.
$(c)$ Screening effect of $d$ and $f$ block elements is nearly same.
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
Consider the figure provided.
→$1 \mathrm{~mol}$ of an ideal gas is kept in a cylinder, fitted with a piston, at the position $\mathrm{A}$, at $18^{\circ} \mathrm{C}$. If the piston is moved to position $B$, keeping the temperature unchanged, then ' $x$ ' $L$ atm work is done in this reversible process.
$\mathrm{x}=$ . . . . . . $\mathrm{L} \mathrm{atm.} \mathrm{(nearest} \mathrm{integer)}$
[Given : Absolute temperature $={ }^{\circ} \mathrm{C}+273.15$, $\left.\mathrm{R}=0.08206 \mathrm{~L} \mathrm{~atm} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}\right]$
In bromination of Propyne, with Bromine $1,1,2, \;2-$tetrabromopropane is obtained in $27\%$ yield. The amount of $1,1,2,2$ tetrabromopropane obtained from $1\; g$ of Bromine in this reaction is $\dots \;\times10^{-1}\; g$. (Nearest integer)
→(Molar Mass : Bromine $=80\; g / mol$ )
Which of the following change will shift the reaction towards the product
$I_2(g) \rightleftharpoons 2I(g)$ $\Delta H_r^o(298\, K) = +150\, kJ$
→$I_2(g) \rightleftharpoons 2I(g)$ $\Delta H_r^o(298\, K) = +150\, kJ$
Strongest reducing agent is
The mass percentage of nitrogen in histamine is
The values of coefficients to balance the following reaction are
→$Cr{(OH)_3} + Cl{O^ - } + O{H^ - } \to CrO_4^{2 - } + C{l^ - } + {H_2}O$
$Cr{(OH)_3}$ $-$ $Cl{O^ - }$ - $CrO_4^{2 - }$ $-$ $Cl^-$
A solution is $500\, ml$ of $2\, M \,KOH$ is added to $500\, ml$ of $2\, M \,HCl$ and the mixture is well shaken.The rise in temperature $T_1$ is noted. The experiment is then repeated using $250\, ml$ of each solution and rise in temperature $T_2$ is again noted. Assume all heat is taken by the solution
→The magnetic quantum number for an electron when the value of principal quantum number is $2$ can have ............ $\mathrm{values}$
→The compound that is not a Lewis acid is
Potential energy of electron present in $He^+$ is
→