MCQ
From the following which compound on heating readily sublimes
- A$NaCl$
- B$MgC{l_2}$
- C$BaC{l_2}$
- ✓$AlC{l_3}$
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$(a)$ $U$ and $H$ each depends only on temperature
$(b)$ Compressibility factor $z$ is not equal to $1$
$(c)$ $C _{ P , m }- C _{ V , m }= R$
$(d)$ $d U = C _{ V } d T$ for any process
$MnCl _2+ K _2 S _2 O _8+ H _2 O \longrightarrow KMnO _4+ H _2 SO _4+ HCl$ (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 $g mol ^{-1}: Mn =55, Cl =35.5$ )