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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 26:

If an organic compound decolorizes bromine water then the compound is?

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A Saturated
B Supersaturated
C Unsaturated
D A solid
E Protonated

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Question 27:

When air is compressed?

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A Its density decreases
B It solidifies
C Its temperature decreases
D Its temperature increases
E Its temperature remains unchanged

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Question 28:

Fats and oils are?

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A Addition products of long chain fatty acids and alkali
B Addition products of long-chain fattyy acids and glycerol
C Condensation products of long-chain fatty acids and glycerol
D Condensation products of formaldehyde and glycerol
E Liquids at 20Â°C

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Question 29:

Which of the following statements about phosphorus is NOT correct?

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A Phosphorus is a solid mineral
B Phosphorus is obtained by oxidation reaction of phosphate
C Phosphorus exists in two allotropic forms
D Both forms of phosphorus are interconvertible
E Yellow phosporus ignites when rubbed on a rough surface

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Question 30:

28.8 cm³ of nitrogen at 15°C is cooled to O°C at constant pressure, the new volume of nitrogen is?

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A 17.4 cm³
B 14.7 cm³
C 27.3 cm³
D 31.7 cm³

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