Correct Answer: D. accrual accounting

Correct Answer: B) Visible imports exceeds visible exports

Explanation

An unfavorable balance of trade occurs when a country imports more goods and services than it exports. This means that the country is spending more money on imports than it is earning from exports. In this question, option B is the correct answer because it states that visible imports (meaning physical goods) exceed visible exports (meaning physical goods).

An unfavorable balance of trade can have negative effects on a country's economy because it means that the country is not able to produce enough goods to meet its needs, and must rely on other countries to supply them. This can lead to a trade deficit and an increase in the country's debt. In contrast, a favorable balance of trade occurs when a country exports more goods and services than it imports. This means that the country is earning more money from exports than it is spending on imports, which can have a positive effect on the economy.

To learn more about this topic, please read the relevant sections of your Commerce textbook.

Correct Answer: A. are extracted by reduction methods

Correct Answer: A. pursue specific and narrow objectives

Correct Answer: C. 50

Correct Answer: B. phosphorus

Explanation

Option B is correct because when plant is lacking phosphorus, its leaves become yellow.

Explanation

(a) Removal of permament hardness in water

(i) Physical method - by distillation.

Chemical method - addition of washing soda and the use of ion-exchange resin.

(ii) Removal of CaCO\(_3\) Physical method ---Filtration.

Chemical method - Bubbling CO\(_2\) into the mixture for a long time or addition of an acid.

(ii) Disadvantages of hard water

- Waste soap

- causes furring in pans and kettles

- results in burst pipe narrow tubes in boilers.

(b)(i) The crystals lose their water of crystallization to the atmosphere.

(ii) Each mole of CaCl\(_2\) ionizes to give two moles of Cl\(^-\) - whereas one mole of NaCl produces one mole of CL\(^-\) on ionization.

(iii) With the iron filings, a greater surface area is exposed than in the nails and since raa increases with increase in surface area.

(c)(i) (i) Amphoteric oxides - ZnO (ii) Neutral oxide - CO (iii) Adidic oxide - NO\(_2\)

(ii) (i) Acid Anhydride (H\(_2\)CO\(_3\)) is CO\(_2\)

(ii) Acid Anhydride (H\(_2\)SO\(_4\)) is SO\(_3\) (iii) COCl\(_2\) is cobalt (II) chloride Mg(NO\(_3\))\(_2\) is magnesium trioxonitrate (V)

(d)(i) Chlorofluorocarbon are aerosols etc.

(ii) 1 mole of O\(_2\) occupies 22.4 dm\(^3\) at s.t.p; 0.125 mole O\(_2\) occupies (22.4 x 0.125) dm\(^3\) at s.t.p.

from \(\frac{P_1V_1}{T_1}\) = \(\frac{P_2V_2}{T_2}\) = 28 dm\(^3\)

= \(\frac{28 \times 1.01 \times 10^5}{273}\)

= \(\frac{v^2 \times 2.02 \times 10^5}{300}\)

\(v^2 = \frac{2.8 \times 1.01 \times 300}{273 + 2.02} = 154dm^3\)

(iii) Fractional distillation of liquid air or electrolysis of water

Correct Answer: B. outrage which Oduche committed against the sacred python

Correct Answer: C. 44°

Explanation

2x + m = 180

x + m = 112

x = 122 - m

2(112 - m) + m = 180

224 - 2m + m = 180

224 - m = 180

224 - 180 = m

m = 44\(^o\)

Correct Answer: B. are agriculturally more productive