WAEC Past Questions and Answers - Page 1624

8,116.

Two-organic substances are labelled K and L if K gave a blue-black colour with iodine solution and L gave a deep red precipitate with Million's reagent, it can be concluded that

A.

K is a carbhydrate and L is a protein

B.

K is alkaline and L is acidic

C.

K is unsaturated and L is a reducing sugar

D.

K is a reducing agent and L is an amino acid

Correct answer is A

No explanation has been provided for this answer.

8,117.

Which of the following needs to be hydrolysed before it shows reducing property?

A.

Glucose

B.

Maltose

C.

Sucrose

D.

Fructose

Correct answer is C

No explanation has been provided for this answer.

8,118.

Which of the following is correct about both compounds show below? CH3CH 2CH2OH;CH 3
CH 2CH(OH)CH3

A.

They have identical physical properties

B.

They are structural isomers

C.

Their general molecular formula is the same

D.

They are oxidized to alkanones

Correct answer is C

No explanation has been provided for this answer.

8,119.

The characteristic of draught animals which does not influence traction effort is

A.

Age

B.

Sex

C.

Breed of animal

D.

Meat quality

Correct answer is D

No explanation has been provided for this answer.

8,120.

Whivh of the following steps gives a correct sequence for surveying a farmstead?

A.

Reconnaissance → preliminary survey → mapping

B.

Mapping → reconnaissance → preliminary survey

C.

Preliminary survey → reconnaissance → mapping

D.

Preliminary survey → mapping → reconnaissance

Correct answer is C

No explanation has been provided for this answer.