2025 JAMB Commerce Past Questions

The length of oestrus cycle (in days) in goat is

1. A.A. 16 - 17
2. B.B. 18 - 21
3. C.C. 19 - 20✓ Correct
4. D.D. 20 - 22

Citizenship of a state by descent requires that______

1. A.A. one is born and bred in the state✓ Correct
2. B.B. one’s mother was born in the state
3. C.C. one’s grand parents were citizens of that state
4. D.D. one is domiciled in that state

Calculate the percentage by mass of nitrogen in calcium trioxonitrate (V) [Ca = 40, N = 14, O = 16]

1. A.8.5%
2. B.13.1%✓ Correct
3. C.17.1%
4. D.27.6%

An instrument used for measuring the intensity of light

1. A.thermometer
2. B.photometer✓ Correct
3. C.anemometer
4. D.hygrometer

The exclusive right given to authors to protect their works from unlawful production is

1. A.a constitutional provision
2. B.a copyright✓ Correct
3. C.an authority to write
4. D.an author's right

PQR is a triangle such that |PQ| = |QR| = 8cm and QPR = 60º. Find the area of $\angle$ PQR

1. A.16$\sqrt{3}cm^2$
2. B.16$\sqrt{2}cm^2$
3. C.8$\sqrt{3}cm^2$
4. D.16$\sqrt{2}cm^2$✓ Correct

Incomplete oxidation of ethanol yields

1. A.CH3COOH
2. B.CH3COCH3
3. C.CH3CH2OCH2CH3
4. D.CH3CHO✓ Correct

What mass of silver is deposited during electrolysis when a current of 0.8 A flows for 25 minutes?

1. A.0.22 g✓ Correct
2. B.1.86 g
3. C.0.14 g
4. D.1.34g

If a car runs at a constant speed and takes 4.5 hrs to run a distance of 225 km, what time will it take to run 150 km?

1. A.2 hrs
2. B.4 hrs
3. C.3 hrs✓ Correct
4. D.1 hr

The best control ensure for rinderpest disease in cattle is

1. A.A. sanitation✓ Correct
2. B.B. vaccination
3. C.C. use of antibiotics
4. D.D. eradication of infected stock