2020 WAEC (WASSCE) Commerce Past Questions

A nuclide $^{202}_{84} Y$ emits in succession an $\alpha-particle$ and a $\beta-particle$. The atomic number of the resulting nuclide is

1. A.198
2. B.83
3. C.82✓ Correct
4. D.80

From the words lettered A to D, choose the word that best completes each of the following sentences: His father has a .............

1. A.round wooden beautiful table
2. B.wooden round beautiful table✓ Correct
3. C.beautiful table
4. D.beautiful round wooden table

A plane inclined at an angle at 30o to the horizontal has an efficiency of 50%. The force parallel to the plane required to push a load of 120 N uniformly up the plane is

1. A.40√3N
2. B.60N
3. C.120N✓ Correct
4. D.200N
5. E.240N

The European imperialist penetration into West Africa was primarily motivated by the following considerations except

1. A.A. compassion
2. B.B. economic
3. C.C. social✓ Correct
4. D.D. military

Brass is a mixture of

1. A.Cu and Sn
2. B.Cu and Zn✓ Correct
3. C.Cu and Mg
4. D.Cu and Pb

From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences: I hate.........waiting,

1. A.to be keeping
2. B.have been kept
3. C.being kept
4. D.to have been kept✓ Correct

The major aim of youth empowerment programmes it to

1. A.A. tackle the problem of insecurity and lawlessnes
2. B.B. provide vocational skills to the youths
3. C.C. help the youths become good decision makers✓ Correct
4. D.D. provide attitudinal reorientation to the youths

An electric drill rated 400W is used to drill a hole in copper of mass 400g in 20s. Calculate the rise in temperature if all the heat produced is absorbed by the copper. [specific heat capacity of copper = 400Jkg-1K-1]

1. A.100oC
2. B.75oC✓ Correct
3. C.50oC
4. D.45oC

Which of the following processes takes place during the production of margarine from vegetable oils?

1. A.Esterification
2. B.Hydrolysis✓ Correct
3. C.Hydrogenation
4. D.Saponification

From the words lettered A to D, choose the word that best completes each of the following sentences. .............an ambulance, the child's life would have been saved

1. A.did we have
2. B.have we have
3. C.have we had✓ Correct
4. D.had we had