Chemistry 2015 JAMB Past Questions

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A compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. If the molar mass of the compound is 180, Find the molecular formula [H = 1, C = 12, O = 16)

A. CH₂O
B. C₃H₆O₃
C. C₆H₁₂O₆
D. C₆H₁₂O₃

View Answer & Discuss (6) JAMB 2015

An oxidation state of Cr in K2Cr2O7

A. 7
B. 6
C. 5
D. 4

View Answer & Discuss (8) JAMB 2015

The elements that belong to the third period of periodic table are

A. Li, Be, Al and D
B. Na, P, O and Cl
C. B, C, N, and O
D. Na, Mg, S and Ar

View Answer & Discuss (10) JAMB 2015

When sugar is dissolve in tea, the reaction is accomplished by?

A. positive change
B. negative entropy change
C. no entropy change
D. a minimum entropy change

View Answer & Discuss (13) JAMB 2015

NH_3(g) + HCl_(s) → NH ₄Cl _(s)

The entropy change in the system above is

A. positive
B. zero
C. negative
D. intermediate

View Answer & Discuss (3) JAMB 2015

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Chemistry 2015 JAMB Past Questions

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