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- 1. Multiple Choice
The chromatogram shows that the -------------- spot is a mixture.
red
orange
green
black
- 2. Multiple Choice
The diagram below shows a chromatogram obtained when a sample X was analysed together with four other known dyes P, Q, R and S. Dye Q was known to cause cancer. Which of the following dye(s) is/are safe for use?
P only
S only
P and S
P and X
- 3. Multiple Choice
A substance is soluble if it can be dissolved.
In paper chromatography, the most soluble solute _____________________ .
does not move from the start point
stays closest to the start point
travels furthest away from the start point
can be found in the middle of the chromatogram
- 4. Multiple ChoiceThe Rf value for the blue component is0.30.7103
- 5. Multiple ChoiceThe Rf value for the red component is0.30.7107
- 6. Multiple ChoiceA separation technique which uses a fractionating column to separate different liquid components in a mixture with different boiling points by heating mixture is calledFractional distillationfiltrationcrystallizationevaporation
- 7. Multiple ChoiceWhich letter in the diagram of Industrial Crude Oil Fractions identifies 'Petroleum Gas'?ABCD
- 8. Multiple ChoiceWhich letter in the diagram of Industrial Crude Oil Fractions identifies 'Diesel'?BDGH
- 9. Multiple ChoiceWhich letter in the diagram of Industrial Crude Oil Fractions identifies 'Bitumen'?BDGH
- 10. Multiple ChoiceHow does the temperature change from top to bottom?IncreasesDecreasesIt does not changeCannot be determined
- 11. Multiple ChoiceWhat does the viscosity of a hydrocarbon tell you?How easily it flowsHow easily it sets alightWhat its boiling point isHow long the hydrocarbon is
- 12. Multiple ChoiceThe longer the hydrocarbon, the ________ the flammability?LowerHigher
- 13. Multiple ChoiceThe longer the hydrocarbon, the _________ the viscosity?LowerHigher
- 14. Multiple ChoiceWhat is kerosene used for?Fuel for shipsFuel for lorriesFuel for airplanesMaking roads
- 15. Multiple ChoiceWhat is the correct order for the fractions that come out of crude oil?fuel gases, petrol, kerosene, diesel, fuel oil, residuefuel gases, petrol, diesel, kerosene, fuel oil, residuefuel gases, kerosene, petrol, diesel, fuel oil, residuefuel gases, diesel, kerosene, petrol, fuel oil, residue
- Answer choicesTagsAnswer choicesTags