Correct Answer: B. beige

Correct Answer: D. slow growth

Correct Answer: D. ΔH at 298 K is the activation energy

Explanation

the standard conditions of 1 atm pressure and 298K.

Correct Answer: A. Kingdom

Correct Answer: D. u > 30cm only

Explanation

Objects at a distance greater than two times of the focal length produces a real image, inverted and diminished in size.

→ 2 * 15 = 30cm

: At >30cm this is applicable

Explanation

(a)Cross elasticity of demand is the degree of responsiveness of demand for a commodity to changes in the price of another commodity. It is the proportionate change in the quantity of goods (x) demanded over the proportionate change in the price of another goods (y) demanded.

=% change in quantity demanded of commodity x

,% change in price of commodity y

or

change \(\frac{QX} {QX} \times \frac{PY} {DPY}\)

b(i) Cross elasticities of demand for bread and yam

Let X = Yam, Y = Bread

New demand = 200kg,

Initial demand = 150kg

Change in demand = 200 -150 = 50kg

Initial price = N15,

New price = N20

Change in price = 20 - 15 =N5

\(\frac{200-150} {150}\) x 100 = 33.3%

\(\frac{20 -15} {15}\) x 100 = 33.3%

or

changeQX xPY=50x15=750= 1

Py Qx 5 150 750

(ii) Beef and fish: Let x = fish, y = Beef

Initial demand = 1000kg,

New demand = 3000kg

Change in demand = 3000 - 1000 = 2000kg

Initial price = N25

New price = N40

Change in price = N40 - N25 = N15

Cross elasticity = change in \(\frac{Qx}{Qx} \times \frac{Py}{Py}\)

\(\frac{2000}{1000} \times \frac{25}{15}\)

= \(\frac{10}{3}\) = 3.3

or

\(\frac{3000-1000} {1000}\) x 100= \(\frac{200}{60}\) = 3.3

\(\frac{40-20} {25}\) x 100

iiiLet x = Margarine,

y = Butter

Initial demand = 250kg

New demand = 400kg

Change in demand = 400 - 250 = 150kg

Initial price = N100

New price = N150

Change in price = N150 - N100 = N50

Cross elasticity = \(\frac{-QX}{QX}\)

\(\frac{PY}{PY}\)

= \(\frac{150}{50} \times \frac{100}{50}\) = \(\frac{6}{5}\) = 1.2

or

\(\frac{400 - 250}{250}\) x 100

= \(\frac{60}{50}\) = 1.2

\(\frac{150 - 100}{100}\) x 100 =50

Correct Answer: A. potassium

Correct Answer: C. Provision of government subsidies to foreign investors

Correct Answer: C. Khurasan

Explanation

(a)A tax is a compulsory payment made by each eligible citizen to the government. The purpose of tax is to raise revenue for the government.

(b) The various tax systems are:

(i) Progressive tax system:This is a form of tax in which tax rate increases as income increases. It takes a larger percentage of income from people with larger incomes. A progressive tax reduces inequality of income distribution. A good example is the PAYE.

(ii) Proportional tax systems: The rate of tax is the same irrespective of the level of income. If a tax leads to both the rich and the poor paying the same proportion or percentage of their incomes as tax, then the tax is called a proportional tax.

(iii) Regressive tax: The higher the income, the lower is the rate of tax. In this type of taxation, a poor person pays a higher proportion of his income. Regressive tax is considered as unfair to the poor, e.g. poll tax.