MCQ
No. of electron in penultimate shell of $d-$ block elements
- ✓$9-18$
- B$19-32$
- C$1-10$
- D$9-32$
✓
Answer
Correct option: A.
$9-18$
a
$(\mathrm{n}-1) \mathrm{s}^{2} \mathrm{p}^{6} \mathrm{d}^{1-10} \mathrm{ns}^{0-2}$
$(\mathrm{n}-1) \mathrm{s}^{2} \mathrm{p}^{6} \mathrm{d}^{1-10} \mathrm{ns}^{0-2}$
(Penultimate) $=n-1$ shell
$\Rightarrow \quad 9 \quad-\quad 19$
Lower $\quad$ Higher
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
Rate of dehydration of alcohols follows the order
Total number of isomers (including stereoisomers) obtain on monochlorination of methylcyclohexane is $........$
→Which of the following relations are correct?
→$(A)$ $\Delta U = q + p \Delta V$
$(B)$ $\Delta G =\Delta H - T \Delta S$
$(C)$ $\Delta S =\frac{ q _{ rev }}{ T }$
$(D)$ $\Delta H =\Delta U -\Delta nRT$
Choose the most appropriate answer from the options given below :
In $K_4[Ni(OX)_3]$, what is the sum of coordination number and oxidation number of Nickel
→The following compounds differ in respect of
$KMnO _4$ oxidises $I ^{-}$in acidic and neutral/faintly alkaline solution, respectively to
→Product of the above Friedel-Craft reaction is
The number of endothermic process/es from the following is
→$A.$ $I _2( g ) \rightarrow 2 I ( g )$
$B.$ $HCl ( g ) \rightarrow H ( g )+ Cl ( g )$
$C.$ $H _2 O ( l ) \rightarrow H _2 O ( g )$
$D.$ $C ( s )+ O _2( g ) \rightarrow CO _2( g )$
$E.$ Dissolution of ammonium chloride in water
Which one of the following does not have a pyramidal shape?
Aspirin is also known as