MCQ
Which of the following is not representative element ?
- ATellurium
- ✓Tantalum
- CThallium
- DAstatine
✓
Answer
Correct option: B.
Tantalum
b
From left to right in periodic table :-
From left to right in periodic table :-
Metallic character decreases
Non-metallic character increases
$\Rightarrow$ It is due to increase in ionization enthalpy and increase in electron gain enthalpy.
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
Colour of the bead in borax bead test is mainly due to the formation of
Dimethyl phthalate
→Number of moles $(x)$ of Grignard reagent consumed in the above reaction is
Which of the following compounds is most reactive towards SN2 reaction.
If the shortest wavelength of $H-$ atom in Lyman series is $x$ , then longest wavelength in Balmer series of $He^+$ is
→Assume that the radius of the first Bohr orbit of hydrogen atom is $0.6 \mathring A$. The radius of the third Bohr orbit of $He ^{+}$is $..................$ picometer. (Nearest Integer)
→Calculate $\Lambda _{HOAc}^\infty $ using appropriate molar conductances of the electrolytes listed above at infinite dilution in ${H_2}O$ at $25\,^o\, C$
→|
Electrolyte : |
$KCl$ |
$KNO_3$ |
$HCl$ |
$NaOAc$ |
$NaCl$ |
|
$\Lambda ^\infty (Scm^2mol^{-1}) $: |
$149.9$ |
$145.0$ |
$426.2$ |
$91.0$ |
$126.5$ |
Potassium permanganate acts as an oxidant in neutral, alkaline as well as acidic media. The final products obtained from it in the three conditions are, respectively
Among the following which is the strongest oxidising agent ?
An aqueous pink solution of Cobalt $(II)$ chloride changes to deep blue on addition of excess of $HCl$ this is because
→The equivalent mass of iodine in the following reaction is ${I_2} + 2{S_2}O_3^{ - 2} \longrightarrow 2{I^\Theta } + {S_4}O_6^{-2 }$
→