Jamb Chemistry 2012 Past Questions and Answers

Question 41:

• JAMB 2012

Carbohydrates are large molecules with the molecular formula C\(_x\)(H\(_2\)O)\(_y\). In which of the following pairs is x not equal to y?

A. Glucose and starch
B. Maltose and starch
C. Sucrose and fructose
D. Maltose and starch

Question 42:

• JAMB 2012

A compound contains 40.0% C, 6.7% H 53.3% O. If the molecular mass of the compound is 180, its molecular formula is [C =12, H =1,O]

A. CH₂O
B. C₃H₆O₃
C. C₆H₆O₃
D. C₆H₁₂O₆

Question 43:

• JAMB 2012

The saponification of an alkanoate to produce soap and alkanol involves

A. Dehydration
B. Esterification
C. Hydrolysis
D. Oxidation

Question 44:

• JAMB 2012

2 - methyl propan -2- ol is an example of a

A. Primary alkanol
B. Secondary alkanol
C. Tertiary alkanol
D. Quartenary alkanol

Question 45:

• JAMB 2012

Ethanol reacts with concentrated tetraoxosulphate (V) acid at a temperature above 170 ^oC to form

A. Ethanone
B. Ethene
C. Ethyne
D. Ethanal