Chemistry 2017 Jamb Past Questions and Answers

Question 16 :

• JAMB 2017

When few drops of concentrated trioxonitrate(V) acid is added to an unknown sample and wanned an intense yellow colouration is observed. The likely functional group present in the sample is

A. NH₃—C—C=O
B. CHO
C. CO
D. CNH₂

Question 17 :

• 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 18 :

• JAMB 2017

Incomplete oxidation of ethanol yields

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

Question 19 :

• 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 20 :

• 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