over a wide range of temperature
over a narrow range of temperature
at a lower temperature than the impure one
at the same temperature as the impure one
Correct answer is B
No explanation has been provided for this answer.
A mixture of sand, ammonium chloride and sodium chloride is best separated by?
sublimation followed by addition of water and filteration
sublimation followed by addition of water and evaporation
addition of water followed by filtration and sublimation
addition of water followed by crystallization and sublimation
Correct answer is A
No explanation has been provided for this answer.
The confirmatory test for alkanoic acids in organic qualitative analysis is the?
turning of wet blue litmus paper red
reaction with alkanols to form esters
reaction with sodium hydroxide to form salt and water
reaction with aqueous Na2COsp3 to liberate a gas which turns lime water milky
Correct answer is B
No explanation has been provided for this answer.
Which of the following represents saponification?
Reaction of carboxylic acids with sodium hydroxide
Reaction of alkanoates with acid
Reaction of alkanoates with alcohols
Reaction of alkanoates with sodium hydroxide
Correct answer is D
No explanation has been provided for this answer.
Catalytic hydrogenation of benzene produces?
an aromatic hydrocarbon
margarine
cyclohexane
D.D.T
Correct answer is C
No explanation has been provided for this answer.