Jamb Chemistry Past Questions and Answers

Question 1926:

• JAMB 2017

A sample of orange juice is found to have a PH of 3.80. What is the concentration of the hydroxide ion in the juice?

A. 1.6 \(\times\) 10^-4
B. 6.3 \(\times\) 10^-11
C. 6.3 \(\times\) 10^-4
D. 1.6 \(\times\) 10^-11

Question 1927:

• JAMB 2017

Incomplete oxidation of ethanol yields

A. CH₃COOH
B. CH₃COCH₃
C. CH₃CH₂OCH₂CH₃
D. CH₂CHO

Question 1928:

• JAMB 2017

The salt formed from a weak acid and a strong base hydrolyzes in water to form

A. A saturated solution
B. An acidic solution
C. A buffer solution
D. An alkaline solution

Question 1929:

• JAMB 2017

The ideal gas laws and equations are true for all gases at

A. Low pressures and lower temperatures
B. Low temperatures and high pressures
C. High pressures and high temperatures
D. Low pressure and high temperatures

Question 1930:

• JAMB 2017

When ΔH is negative, a reaction is said to be

A. Endothermic
B. Exothermic
C. Reversible
D. Ionic