When water was added to a white anhydrous substance X, the colour changed to blue. X is

• A. CuSO₄
• B. FeSO₄
• C. Na₂SO₄
• D. PbSO₄

Which of the following methods can be used to obtain pure water from a mixture of sand, water and methanoic acid?

• A) netralization with NaOHfoolowed by filtration
• B) neutralization with NaOH followed by distillation
• C) fractional distillation
• D) filtration followed by distillation

A final examination requires that a student answer any 4 out of 6 questions. In how many ways can this be done?

• A. 15
• B. 20
• C. 30
• D. 45

Which of the following are characteristics of manufacturing induitries in Tropical Africa? I. Export-oriented II. Labour intensive III. Consumer-oriented IV. Diversified production

• A. I and II only
• B. II and III only
• C. I and IV only
• D. I and III only

The smooth operation of the public service in Nigeria is being hampered by

• A. debt burden
• B. adequate training
• C. privatization
• D. bribery and corruption

The account where the profit are distributed to the partner in their profit sharing ratio in partnership

• A. trading account
• B. appropriation account
• C. balance sheet
• D. profit and loss account

Find the variance of 2, 6, 8, 6, 2 and 6

• A. 6
• B. 5
• C. √6
• D. √5

A business which requires a certificate of trading in order to commence operation is a?

• A. co-operative society
• B. private company
• C. sole propietorship
• D. public company

Which of the following activities does not clearly describe the art of mechanization?

• A. using milking machins on dairy animals
• B. clearing land with a cutlass
• C. harvesting maize with a harvester
• D. using a tractor to apply herbicides

Differentiate \(x^{2} + xy - 5 = 0\).

• A. \(\frac{-(2x + y)}{x}\)
• B. \(\frac{(2x - y)}{x}\)
• C. \(\frac{-x}{2x + y}\)
• D. \(\frac{(2x + y)}{x}\)