Chemistry Practical class XI, XII (11,12)

25. TO DETECT THE PRESENCE OF DISSOLVED SOLIDS IN THE GIVEN AQUEOUS SOLUTION, AND TO RECOVER THE SOLVENT FROM THE SOLUTION.

THEORY: Distillation is the process of converting a liquid into its vapour by the application of heat, and then condensing the vapour into the same

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35. TO PERFORM SOME CHEMICAL REACTIONS AND TO REPRESENT THEM IN BALANCED CHEMICAL EQUATIONS.

1. The more electropositive metals displace less electropositive metals from their compounds in aqueous solution. Take some dilute CuSO4 solution

34. TO SEPARATE A MIXTURE OF DYES IN INK OR UNIVERSAL INDICATOR BY PAPER CHROMATOGRAPHY AND TO DETERMINE THEIR Rf VALUES.

THEORY: Chromatography is a simple technique of separating micro-quantities of substances in a mixture. It was first discovered by a

33. TO SHOW THE PRESENCE OF OXYGEN IN AIR AND TO DETERMINE ITS PERCENTAGE BY VOLUME.

THEORY: Burning is one of the most familiar examples of chemical changes. The fact that air is essential for burning

32. TO SHOW THE PRESENCE OF CARBON DIOXIDE IN AIR.

THEORY: The presence of carbon dioxide in air can be shown by its action on lime water. Carbon dioxide turns

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