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WorksheetsSK025 Post Lab Experiment 5
Total questions: 13
Worksheet time: 8mins
What is the observation for the reaction of 2-methyl-2-propanol with Lucas reagent?
Solution turns cloudy immediately
No change
Solution turns cloudy within 10 minutes
What is the observation for 2-butanol in Lucas test?
No change
Solution turns cloudy immediately
Solution turns cloudy within 10 minutes
Which test listed below is the confirmatory test for phenol?
Oxidation with sodium dichromate
Lucas Test
Bromine water
Lucas test is used to ……………………..
Detect methyl carbinol group
Detect carbonyl compound
Detect hydroxyl group
Differentiate the three classes of alcohols
An alcohol X, C6H6O produced white precipitate when reated with bromine solution.
State the name of chemical test involved:
Lucas test
Iodoform test
Bromine water
Hinsberg test
Give the observation when 2-methyl-1-propanol react with concentrated hydrochloric acid and anhydrous zinc chloride.
No cloudy solution formed after 10 minutes
Cloudy solution formed within 5 minutes
Cloudy solution formed after 10 minutes
Cloudy solution formed immediately
What is the observation for the above reaction?
No cloudy solution after within 15 minutes
Cloudy solution within 5 minutes
Cloudy immediately/instantly
Light yellow precipitate formed
2-butanol is __________ alcohol
primary
secondary
tertiary
What is Na2Cr2O7?
Potassium Permanganate
Sodium Dichromate
Sodium Permanganate
Lucas reagent is a mixture of concentrated ______(i)______ and anhydrous ______(ii)_______.
(i) hydrochloric acid (ii) zinc chloride
(i) sulphuric acid (ii) zinc chloride
Observation for reaction of propanol with hot, acidified sodium dichromate, Na2Cr2O7 is orange solution of Na2Cr2O7 turns to green.
True
False
Alcohol B turns the orange colour of hot acidified Na2Cr2O7 solution to green. The reaction of alcohol B with Lucas reagent gives cloudy solution within 10 minutes. Based on this observation, what is the class for alcohol B?
Primary alcohol
Secondary alcohol
Tertiary alcohol
Alcohol C turns the orange colour of hot acidified Na2Cr2O7 solution to green while no cloudiness is observed with Lucas reagent after 10 minutes Based on this observation, what is the class for alcohol C?
Primary alcohol
Secondary alcohol
Tertiary alcohol
