MCQ
The EMF of a galvanic cell is determined by using a:
- AVoltmeter.
- B1potentiometer.
- CCoulometer.
- DAmmeter.
Explanation:
EMF is measured by using a voltmeter while standard EMF by a potentiometer.
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$R - \mathop {\mathop C\limits^{||} }\limits^O - OH\xleftarrow{{{H_3}{O^ + }}}X\xrightarrow{{[H]}}RC{H_2}N{H_2};$
'$X$' is

$\begin{array}{*{20}{c}}
{{C_2}{H_5}MgBr + {H_2}C - C{H_2}\xrightarrow{{{H_2}O}}} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\backslash \,\,\,\,/} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O}
\end{array}A$