MCQ
The extent of darkness caused due to smog can be determined by the help of ?
- AHorizontal microscopes.
- BSmoke filters.
- ✓Ringelmann's charts.
- DAll of the above.
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| Item $-I$ (Mixture) | Item $-II$ (Separation method) |
| $(a)$ $H_2O :$ Sugar | $p.$ Sublimation |
| $(b)$ $H_2O :$ Aniline | $q.$ Recrystallization |
| $(c)$ $H_2O :$ Toluene | $r.$ Stem distillation |
| $s.$ Differential extraction |
$CaCO _{3( s )}+2 HCl _{( aq )} \rightarrow CaCl _{2( aq )}+ CO _{2( g )}+2 H _{2} O _{( l )}$
[Calculate upto second place of decimal point]