Jamb Chemistry Past Questions and Answers

Question 1826:

• JAMB 2015

What volume of 0.5mldm³ H₂SO₄ will exactly neutralize 20cm³ of 0.1moldm³ NaOH Solution?

A. 2.0cm³
B. 5.0cm³
C. 6.8cm³
D. 8.3cm³

Question 1827:

• JAMB 2015

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

Question 1828:

• JAMB 2015

An oxidation state of Cr in K2CrO7

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

Question 1829:

• 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

Question 1830:

• JAMB 2015

When sugar is dissolve in ten, the reaction is accomplished by

A. Positive change
B. Negative entropy change
C. No entropy change
D. A minimum entropy change