Jamb Chemistry Past Questions and Answers

Question 646:

• JAMB 1990

The label on a reagent bottle containing a clear organic liquid dropped off.The liquid was neutral to litmus and gave a colourless gas with metallic sodium. The liquid must be an?

A. Alkanoate
B. Alkaene
C. Alkanol
D. Alkane

Question 647:

• JAMB 1990

Alkaonic acids have low volatility compared with alkanols because they?

A. Are more polar than alkaonls
B. Have two oxygen atoms while alkanols have one
C. Form hydrogen bonds while alkanols do not
D. Form two hydrogen bonds while alkanols form one

Question 648:

• JAMB 1990

The octane number of a fuel whose performance is the same as that of a mixture of 55 g of 2,2,4- trimethly pentane and 45 g of n-heptane is ?

A. 45
B. 55
C. 80
D. 100

Question 649:

• JAMB 1990

Which of the following is formed when maltose reacts with concentrated tetraoxosulphate (VI) acid ?

A. Carbon (IV) oxide
B. Coal tar
C. Charcoal
D. Toxic fumes

Question 650:

• JAMB 1990

If a gas occupies a container of volume 146 cm³ at 18°C and 0.97`atm, its volume 146cm³ at s.t.p is?

A. 133
B. 146
C. 266
D. 292