MCQ
Glacial acetic is obtained by
- ADistilling vinegar
- ✓Crystallizing separating and melting acetic acid
- CTreating vinegar with dehydrating agent
- DChemically separating acetic acid
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($A$) a high activation energy usually implies a fast reaction.
($B$) rate constant increases with increase in temperature. This is due to a greater number of collisions whose energy exceeds the activation energy.
($C$) higher the magnitude of activation energy, stronger is the temperature dependence of the rate constant.
($D$) the pre-exponential factor is a measure of the rate at which collisions occur, irrespective of their energy.
$Cr/Cr^{3+} (1.0\ M)\ ||\ Co^{+2} (1.0\ M)/Co$
$[E^o$ for $Cr^{3+}/Cr =\ -0.74\ V$ and $Co^{+2}/Co=\ -0.28\ V]$


