Correct Answer: C. SiO₃

Explanation

The correct answer is C (intended as SiO_2, silica/sand).

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• Haematite is an iron ore mainly composed of iron(III) oxide (Fe_2O_3).

• The major gangue (impurity) present in haematite is silicon dioxide (silica, SiO_2), which is typically written as Option C (with a common typographical error of SiO_3).

• In the blast furnace, limestone (CaCO_3) is added as a flux. It decomposes into CaO, which then reacts with this acidic impurity (SiO_2) to form calcium silicate slag (CaSiO_3):

CaO + SiO_2 \rightarrow CaSiO_3

Explanation

(a) (i) Name major export items from your country The main export items include:

(a) Petroleum

(b) Cocoa

(c) Rubber

(d) Tin

(e) Columbite

(f) Soya beans

(g) hides and skin

(h) Natural gas

(i) Beverages

(j) Texti

(ii) Name major Import items to your country The items include: motor vehicle, machinery, electronics, tractors, computer, textile, pasteries, drinks, food (rice) et

(iii) Name major trading partners of your Country:The trading partners include: Japan, Britain, China, USA, Canada, Germany, Italy, South Korea, Spain, Taiwan, Belgium.

(b) Benefits of trading with other countries

(a) Fosters international cooperation

(b) Provision of foreign exchange

(c) Provision of employment

(d) Generation revenue to government

(e) Generation of income to individual

(f) Encourage specialisation in production

(g) Bring about diffusion of ideas / innovation

(h) Provision of new products

(i) Improves standard of living

(j) Stimulates production of export goods

(k) Stabilizes world prices

(I) Leads to growth of industries

(c) Problems of International Trade

(1) Political instability

(2) Low level of currency

(3) Inadequate capital

(4) Inadequate foreign exchange

(5) inadequate production of goods

(6) High cost of transportation

(7) Port congestion

(8) Low demand for products

(9) High tariffs goods

(10) Strained international relations

(11) Smuggling / economic sabotage Question

Correct Answer: B. 45

Explanation

\(^{3^2 + 1}\)C\(_{3+5}\)

\(^{9 + 1}\)C\(_{3+5}\)

\(^{10}\)C\(_{8}\) = \(\frac{10!}{8! 2!}\)

\(\frac{10 * 9 * 8!}{8! 2!}\) = \(\frac{10 * 9}{2}\)

= 45

Correct Answer: C. ordinary partnership

Correct Answer: D. pirates

Explanation

The correct word to complete the sentence is 'pirates'. Pirates are known for intercepting and robbing ships at sea.

Correct Answer: (c) 3rd closest to the sun

Correct Answer: B. Demetrius of Hermia's flight

Explanation

This was because he was being abandoned.

Correct Answer: B. p = 5, q = -3

Explanation

If \(\begin{pmatrix} p+q & 1\\ 0 & p-q \end {pmatrix}\) = \(\begin{pmatrix} 2 & 1 \\ 0 & 8 \end{pmatrix}\)

Find the values of p and q

If \(\begin{pmatrix} p+q & 1\\ 0 & p-q \end {pmatrix}\) = \(\begin{pmatrix} 2 & 1 \\ 0 & 8 \end{pmatrix}\)

Find the values of p and q

p + q = 2

p - q = 8

\(\overline{\frac{2p}{2} = \frac{10}{2}}\)

p = 5

from p + q = 2

5 + q = 2

q = 2 - 5

= -3

Correct Answer: D. rigid

Correct Answer: A. calcium and phosphorus