MCQ
Which solution has the highest $pH $ value
- ✓$1\,M\,KOH$
- B$1\,M\,{H_2}S{O_4}$
- CChlorine water
- DWater containing carbon dioxide
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{C{H_3}{\text{ }} - {\text{ }}CH{\text{ }} = {\text{ }}CH{\text{ }} - {\text{ }}C{H_3}\xrightarrow{{{H_3}{O^ + }}}\,C{H_3} - C{H_2} - CH - C{H_3}}
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In the chemical reaction
$Mn{O_2} + 4HCl \to MnC{l_2} + 2{H_2}O + C{l_2}$
$(1)$ Manganese ion is oxidised
$(2)$ Manganese ion is reduced
$(3)$ Chloride ion is oxidised
$(4)$Chloride ion is reduced.
Which of these statements are correct