MCQ
Acetophenone can be prepared
- ✓Oxidation of $1-$ phenyl ethanol
- BDistillation of calcium benzoate
- COxidation of $2$ phenyl ethanol
- DBenzene reacts with methanoyl chloride and $AlCl_3$
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Statement $I$: Aqueous solution of $K _2 Cr _2 O$, is preferred as a primary standard in volumetric analysis over $Na _2 Cr _2 O$, aqueous solution
Statement $II:$ $K _2 Cr _2 O$, has a higher solubility in water than $Na _2 Cr _2 O _7$
In the light of the above statements, choose the correct answer from the options given below:

$Ni^{2+} | Ni = -0.25\, V$ ;
$Cu^{2+} | Cu = 0.34\, V$
$Ag^+ | Ag = 0.80\, V$ ;
$Zn^{2+} | Zn = -0.76 \,V$
Which of the following reactions under standard condition will not take place in the specified direction