MCQ
Charge required to liberate $11.5\,g $ sodium is
- ✓$0.5\,F$
- B$0.1\,F$
- C$1.5\,F$
- D$96500$ coulombs
✓
Answer
Correct option: A.
$0.5\,F$
a
(a) $N{a^ + } + {e^ - } \to Na$
(a) $N{a^ + } + {e^ - } \to Na$
Charge (in $F$) $=$ moles of $e^-$ used $=$ moles of $Na$ deposited
$ = \frac{{11.5}}{{23}}\;gm = 0.5\,Faraday$.
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
A co-ordination complex compound of cobalt has the molecular formulae containing five ammonia molecules, one nitro group and two chlorine atoms for one cobalt atom. One mole of this compound produces three mole ions in an aqueous solution on reacting with excess of $AgN{O_3},$ $AgCl$ precipitate. The ionic formula for this complex would be:
→For strong electrolyte ${ \wedge _m} = \wedge _{_m}^o - 10\sqrt C $ . Then calculate ${ \wedge _m}$ at $0.01$ $M$ if its value at $0.16$ $M$ is $200\ Scm^2 mol^{-1}$ ................ ${\rm{S}}\,{\rm{c}}{{\rm{m}}^2}{\rm{mo}}{{\rm{l}}^{ - 1}}$
→What is the concentration of nitrate ions if equal volumes of $0.1\, M$ $AgN{O_3}$ and $0.1\, M $ $NaCl$ are mixed together
→The minimum energy that must be possessed by photons in order to produce the photoelectric effect with platinum metal is $....\,\times 10^{-19} \,J$
→[Given: The threshold frequency of platinum is $1.3$ $\times 10^{15} \,s ^{-1}$ and $h =6.6 \times 10^{-34} \,J \,s$.]
Arrange the following compounds in order of increasing dipole moment.
→(I) Toluene
(II) $m - $dichlorobenzene
(III) $o - $dichlorobenzene
(IV)$p - $dichlorobenzene
$[Image]$
→Consider the above reaction, the product $'X'$ and $'Y'$ respectively are :
If the solubility of a sparingly soluble salt of the type $B{A_2}$ (giving three ions on dissociation of a molecule) is $x$ moles per litre, then its solubility product is given by
→An organic compound is subjected to chlorination to get compound A using $5.0\, \mathrm{~g}$ of chlorine. When $0.5\, \mathrm{~g}$ of compound $\mathrm{A}$ is reacted with $\mathrm{AgNO}_{3}$ [Carius Method], the percentage of chlorine in compound $A$ is $.....$ when it forms $0.3849$ $g$ of $\mathrm{AgCl}$. (Round off to the Nearest Integer)
→(Atomic masses of $\mathrm{Ag}$ and $\mathrm{Cl}$ are $107.87$ and $35.5$ respectively)
Reimer-Tiemann reaction involves a
What changes does not occur when $K_2Cr_2O_7$ react with $H_2O_2$ solution
→