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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 1:

A mixture is different from a compound because

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A The properties of a compound are those of its individual constituents while those of a mixture differ from its constituents
B A mixture is always homogeneous while a compound is not
C The constituent of a compound are chemically bound together while those of a mixture are not
D A mixture can be represented by a chemical formula while a compound cannot

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Question 2:

A mixture is different from a compound because

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A The properties of a compound are those of its individual constituents while those of a mixture differ from its constituents
B A mixture is always homogeneous while a compound is not
C The constituent of a compound are chemically bound together while those of a mixture are not
D A mixture can be represented by a chemical formula while a compound cannot

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Question 3:

What is the percentage of sulphur in sulphur (IV) oxide?

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A 66%
B 25%
C 40%
D 50%

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Question 4:

A gas X diffuses twice as fast as gas Y. if the relative molecular mass of X is 32, calculate the relative molecular mass of Y.

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A 128
B 8
C 16
D 64

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Question 5:

200 cm³ of a gas at 25^oC exerts a pressure of 700 mmHg. Calculate its pressure if its volume increase 350 cm³ at 75^oC.

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A 342.53 mmHg
B 1430.54 mmHg
C 467.11 mmHg
D 400.00 mmHg

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