MCQ
Name the gas released at the cathode when acidulated water is electrolysed.
- ✓Hydrogen
- BNitrogen
- COxygen
- DNone of the above
✓
Answer
Correct option: A.
Hydrogen
Acidulated water is a mixture of cold water and small amount if vinegar, lemon juice or lime juice. it's just used as a soak to prevent discoloration of some fruits and vegetables that darken quikly when their cut surfaces are exposed to air. During electrolysis of acidulated water, hydrogen gas $(H_2)$ is liberated at cathode.
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
Reagent($s$) which can be used to bring about the following transformation is(are)
→($A$) $\mathrm{LiAlH}_4$ in $\left(\mathrm{C}_2 \mathrm{H}_5\right)_2 \mathrm{O}$
($B$) $\mathrm{BH}_3$ in $THF$
($C$) $\mathrm{NaBH}_4$ in $\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$
($D$) Raney $\mathrm{Ni} / \mathrm{H}_2$ in $\mathrm{THF}$
Electronegativity of inert gases is :
Main reason for brown ring test of $NO_3^-$ is
→In a mixture of $1\,gm $ ${H_2}$ and $8\,gm $ ${O_2}$, the mole fraction of hydrogen is
→The given reaction is :
→$C_6H_5-CHO + C_6H_5CHO$ $\xrightarrow{{N{a_2}[Fe{{(CO)}_4}]}}$ $\begin{array}{*{20}{c}}
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{{C_6}{H_5} - C - O - C{H_2}{C_6}{H_5}}
\end{array}$
Why $NH_3$ can’t be dried by $H_2SO_4,\, P_2O_5$ , and $CaCl_2$
→Ziegler-Natta catalyst is an organometallic compound of which metal
The 'spin only' magnetic moment value of $\mathrm{MO}_4{ }^{2-}$ is . . . . . BM. (Where $\mathrm{M}$ is a metal having least metallic radii. among $\mathrm{Sc}, \mathrm{Ti}, \mathrm{V}, \mathrm{Cr}, \mathrm{Mn}$ and $\mathrm{Zn}$ ).
→(Given atomic number: $\mathrm{Sc}=21, \mathrm{Ti}=22, \mathrm{~V}=23$, $\mathrm{Cr}=24, \mathrm{Mn}=25$ and $\mathrm{Zn}=30)$
The acidity of alpha hydrogen of the carbonyl group is due to:
Fomaldehyde is the starting material for the manufacture of :