MCQ
When a neutral atom is converted into cation, there is
- ADecrease in the atomic number
- BAn increase in the atomic number
- ✓A decrease in size
- DAn increase in size
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$C{S_2}(g) + 4{H_2}(g) \to C{H_4}(g) + 2{H_2}S(g)$

$MnCl _2+ K _2 S _2 O _8+ H _2 O \longrightarrow KMnO _4+ H _2 SO _4+ HCl$ (equation not balanced).
Few drops of concentrated $HCl$ were added to this solution and gently warmed. Further, oxalic acid ( $225 mg$ ) was added in portions till the colour of the permanganate ion disappeared. The quantity of $MnCl _2$ (in $mg$ ) present in the initial solution is. . . . . . . . . (Atomic weights in $g mol ^{-1}: Mn =55, Cl =35.5$ )