Correct Answer: D. 10 x 1024 x 1024 x 8

Correct Answer: D. elections

Explanation

(a) Boiling point of a liquid is the temperature at which saturated vapour pressure of a liquid equals the external atmospheric pressure.

(b) Fill a round bottom flask partially with water, then pump out the air gradually with a vacuum pump. At a state when the saturation vapour pressure equal atmospheric pressure, the water is observed to be boiling.

(c) Application of i expansion of metals are in:

- Riveting two or more metal plates.

- Fixing of metal rims on metal wheels.

- Fusing of platinum wire through walls of glass vessels.

- Automatic fire alarms and

- Thermostat.

(d)(i) Volume = \(\frac{Mass}{Density} = \frac{250}{1.25}\)

= 200\(m^2\)

But volume = Ibh

h = \(\frac{v}{Ib} = \frac{200}{7 \times 10}\)

= 2.86m

(ii) Q = mc\(\theta\)

V = 250 x 1010(34 - 24)

= 252500 or 2.525 x 10\(^6\)

(iii) The actual energy value will be higher in value than the calculated value because --Part of heat is extracted. from the walls in the room and other materials. he room also is not airtight, there are heat leakages in and out of the room.

Explanation

a.

• Accreditation of higher institutions to teach Marketing in tertiary institutions
• The separation of Marketing from other business disciplines for it to have its autonomous status
• The discovery of crude oil in large quantities in Nigeria requiring the oil companies to market their products worldwide
• The emergence of automation which resulted to mass production requiring companies to sell their products and this demanded the application and practice of marketing
• The lifting of embargo on imported goods resulting in mass importation of products which required firms to apply marketing principles in selling these products.
• The establishment of professional, bodies charged with the responsibility of standardizing professional marketing practice in Nigeria.
• Advancement in technology that resulted in the introduction of electronic marketing of products otherwise known as internet marketing.

b.

• It enhances the identification of market opportunities by companies
• It encourages buyer-seller relationship
• It provides storage for goods between the time of production and consumption
• lt enhances the standardization and grading of products
• It provides Vital information to the society on the type of products, price and where the products are found
• It is involved in the movement of products from manufacturers.

Correct Answer: A. confederal government

Explanation

(a)(i) Definition of crop rotation: Crop rotation is the planting of different types of crops on the same piece of land in a definite sequence. (ii) Design of a 4-year crop rotation system using yam, cassava, maize and Groundnut.

NB: - For the purpose of the 4 crops given:

- Yam and cassava must not follow each other

- Groundnut and maize must not follow each other

(b) Reasons why weeds are difficult to control

- Weeds are aggressive and persistent in their growth/vigorous growth

- Weeds have high reproductive capacity

- Most weed seeds have long periods of viability

-Weeds have efficient dispersal methods

- Weeds have efficient means of propagation

-Weed seeds have long period of dormancy

-Some we seeds mature at the same time as the crops and are harvested and stored along with the crops Waiting for the next cropping season (

-Weeds have modified parts, leaves, stems, roots and seeds that help them survive very adverse environmental conditions/wide adaptation

- Most weeds produce many seeds/are prolific

-Short life cycle

(c) Effects of diseases on crop production

Reduction in yield/productivity, Increases the cost of production, Reduction in quality of crops, Causes death -of whole plants, Leads to retarded growth in crops, -Delayed maturity, Causes reduction in the income of the farmers, Damage to crop parts/reduction in photosynthesis

Correct Answer: B. Sudan Savanna

Explanation

(a) Three reasons why air is classified as a mixture include:

(i) The composition of air variables

(ii) The components can be easily obtained/separated by physical means

(iii) The constituents of air still retain their individual properties.

(b) The two methods include (i) Sublimation (ii) Magnetization

Explanation

(a)(i)Primary production: This involves the extraction of raw materials in their natural form from land, sea and air e.g. products from agriculture, mining,quarrying, fishing

(ii)Secondary production: This entails the conversion of basic raw materials or semi-finished commodities to their final forms that are acceptable to the consumers, i.e. the raw materials extracted from soil and sea are processed and transformed into garri, clothes, houses, motor cars etc.

(iii)Tertiary production: This type of production includes commercial and professional services. All those who provide commercial services such as wholesalers, retailers and transporters are involved in the tertiary production. It also includes persons who perform direct or professional services such as doctors, lawyers and barbers.

(b)(i) inadequate capital

(ii) low technology

(iii) shortage of relevant skills

(iv) inadequate infrastructure

(v) inadequate entrepreneurial capacity

(vi) small market size

(vii) lack of research support to push the

secondary and tertiary sectors

Correct Answer: A. Mesosphere