MCQ
When ethanol is mixed with acetone
- ✓Heat is absorbed
- BHeat is released
- CHeat neither absorbed nor released
- DCan't be predicted
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$Zn | ZnSO_4 \,(0.01\, M) | | CuSO_4\,(1.0\, M) | Cu$
When the concentration of $ZnSO_4$ is $1.0\,M$ and that of $CuSO_4$ is $0.01\,M$, the $emf$ changed to $E_2$ What is the relation between $E_1$ and $E_2$?
$MnO_4^ - \, + \,x{e^ - }\,\xrightarrow[{(Alkaline\,\,medium)}]{}MnO_4^{2 - }$
$MnO_4^ - \, + \,y{e^ - }\,\xrightarrow{{(Acidic\,\,medium)}}M{n^{2 + }}$
$MnO_4^ - \, + \,z{e^ - }\,\xrightarrow{{(Neutral\,\,medium)}}Mn{O_2}$
| Column $-I$ (various solutions) |
Column $-II$ (Their freezing point ) |
||
| $a$ | $0.1\,M$ $BaCl_2$ solution | $p$ | $271\,K$ |
| $b$ | $0.1\,M$ $NaCl$ solution | $q$ | $270\,K$ |
| $c$ | $0.1\,M\, K_3 [Fe(CN)_6]$ solution | $r$ | $268\,K$ |
| $d$ | $0.1\,M\, Al_2 (SO_4)_3$ solution | $s$ | $269\,K$ |
Given : Freezing point of $0.1\,M$ sucrose solution $= 272\,K$ and $F.pt.$ of water $= 273\,K$
Which of the following option show correct matches ?