One sample of atmospheric air is found to have $0.03\%$ of carbon dioxide and another sample $0.04\%$. This is evidence that
- AThe law of constant composition is not always true
- BThe law of multiple proportions is true
- CAir is a compound
- DAir is a mixture
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What method can be used for the separation of two volatile liquids that have a significant difference in their boiling points?
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How is the pure liquid separated from a mixture obtained by vapour distillation?
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View SolutionThe correct match between items $I$ and $II$ is
Item-$I$ (Mixture) Item-$II$ (Separation method) $(a)$ $H_2O :$ Sugar $p.$ Sublimation $(b)$ $H_2O :$ Aniline $q.$ Recrystallization $(c)$ $H_2O :$ Toluene $r.$ Steam distillation $s.$ Differential extraction
| Item-$I$ (Mixture) | Item-$II$ (Separation method) |
| $(a)$ $H_2O :$ Sugar | $p.$ Sublimation |
| $(b)$ $H_2O :$ Aniline | $q.$ Recrystallization |
| $(c)$ $H_2O :$ Toluene | $r.$ Steam distillation |
| $s.$ Differential extraction |
Define an element and provide examples.
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