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4. TO DETERMINE THE MIXTURE MELTING POINT OF WAX BY THE COOLING CURVE METHOD.

APPARATUS REQUIRED i) Hard glass test tube containing wax. ii) Centigrade thermometer

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

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

THEORY: The presence of carbon dioxide in air can be shown by