MCQ
Find the odd one out.
- ASodium benzoate
- Bsalt of sorbic acid
- Cacetic acid
- ✓sodium bi carbonate
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| LIST I | LIST II |
| A. Phthalo blue pigment | 1. antitumor drug |
| B. EDTA | 2. Printing ink |
| C. $Ni ( DMG )_2$ | 3. Softening of hard water |
| D. Cis-platin | 4. Metal ion estimation |
The button cell used in watches functions as follows.
$Zn _{( s )}+ Ag _2 O _{( s )}+ H _2 O _{( l )} \rightleftharpoons 2 Ag _{( s )}+ Zn _{( aq )}^{2+}+2 OH _{( aq )}^{-}$
the half cell potentials are
$Ag _2 O _{( s )}+ H _2 O _{( l )}+2 e ^{-} \longrightarrow 2 Ag _{( s )}+2 OH _{( aq )}^{-}$
$E ^0=0.34 V$ The cell potential will be