Jamb Chemistry Past Questions and Answers

Question 1741:

• JAMB 2014

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

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

Question 1742:

• JAMB 2014

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.

A. 128
B. 8
C. 16
D. 64

Question 1743:

• JAMB 2014

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.

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

Question 1744:

• JAMB 2014

An element X has electron configuration 1s² 2s² 2p⁶ 3s² 3p⁵. Which of the following statements is correct about the element?

A. Lt has a completely filled p-orbital
B. Lt has 5 electrons in its outermost shell.
C. Lt belongs to group ll on the periodic table
D. Lt is a halogen

Question 1745:

• JAMB 2014

Beryllium and aluminium have similar properties because they

A. Are both metals
B. Belong to the same group
C. Belong to the same period
D. Are positioned diagonally to each other