Correct Answer: C. 1

Explanation

\(\frac{25 \frac{2}{3} \div 25 \frac{1}{6}}{( \frac{1}{5})^{-\frac{7}{6}} \times ( \frac{1}{5})^{\frac{1}{6}}}\) = \(\frac{25^{4 - \frac{1}{6}}}{(\frac{1}{5})^{-7 + \frac{1}{6}}}\)

= \(\frac{25^{\frac{1}{2}}}{(\frac{1}{5})^{-1}}\)

= \(\frac{(5^2)^{\frac{1}{2}}}{(5^{-1})^{-1}}\)

= \(\frac{5}{5}\)

= 1

Correct Answer: B. -1, 2

Correct Answer: D) chromatography

Explanation

In this question, we are asked to determine the best method to separate a mixture of ink containing cobalt (III), copper (II), and iron (II) ions. The correct answer is chromatography.

Chromatography is a separation technique used to separate the components of a mixture based on their different affinities towards a stationary phase and a mobile phase. In the case of ink, the components have different affinities towards a stationary phase (usually a solid or a coated paper) and a mobile phase (usually a solvent or a gas).

Let's briefly discuss the other options and why they are not suitable for this separation:

Option A: Fractional crystallization is a method used to separate components of a mixture based on their solubilities. While it can be effective for separating certain mixtures, it may not be the best method for separating ink components, as the ions may have similar solubilities and thus would not separate efficiently.

Option B: Fractional distillation is used to separate components of a mixture based on their boiling points. This method is more suitable for separating mixtures of liquids (such as different components in crude oil) rather than ink components, which are usually solids dissolved in a liquid.

Option C: Sublimation is the process of a solid transitioning directly into a gas without passing through a liquid phase. This method is not suitable for separating the ink components, as cobalt (III), copper (II), and iron (II) ions are not known to undergo sublimation.

In conclusion, chromatography is the most appropriate method for separating the components of a mixture of ink containing cobalt (III), copper (II), and iron (II) ions, as it is based on their different affinities towards a stationary phase and a mobile phase, making it a highly effective and precise separation technique.

Correct Answer: A) taxes to government

Explanation

On the other hand, options B, C, and D are not examples of social responsibility. Dividends are payments made to shareholders as a return on their investment in the company. Interest on loans is the cost of borrowing money from a lender. Premium for insurance is the amount paid by a company to an insurance company to protect against potential risks. While these activities are important for the financial health of a company, they do not necessarily have a direct impact on the well-being of society.

In conclusion, paying taxes to the government is an example of social responsibility in business. To learn more about this, please read the relevant sections of the recommended textbooks

Correct Answer: B. meiosis

Correct Answer: B. waybill

Correct Answer: B. 624 A. H

Explanation

(a) A demand schedule is a table which shows the different quantities of a commodity which consumers are willing to buy at various prices at a particular time.

(b) The law of demand states that at a higher price, less is demanded and at a lower price, more is demanded,other things being equal.

(c)(i)Competitive demand: This applies to commodities which can be used interchangeably. Demand for substitute goods is thus competitive e.g Milo and bournvita, meat and fish, turkey and chicken e.t.c

(ii)Derived demand: This is demand for a commodity which is not needed for direct satisfaction, but rather for the production of other goods e.g the demand for labour and other factors of production.

(iii) Joint or complementary demand: This refers to demand for commodities which are needed to together to satisfy a want. There is joint demand for two commodities when they are such that without one, the other cannot satisfy a want e.g car and petrol, torch and batteries e.t.c.

(iv)Composite demand: This refers to the total or aggregate demand for a commodity which has several uses. The composite demand for cassava for instance comprises the demand for cassava for its various uses e.g making garri, for making industrial starch, for making fufu, e.t.c.

Correct Answer: C. His transformation from a persecutor to a proclaimer of the Gospel

Explanation

The Apostle Paul's life in Acts exemplifies God's sovereignty through his transformation from a persecutor to a proclaimer of the Gospel. Before his conversion, Paul (then known as Saul) was a zealous persecutor of Christians. However, after his encounter with Jesus on the road to Damascus, he became one of the most fervent proclaimers of the Gospel (Acts 9:1-22).

Correct Answer: D. Termination

Explanation

UAG, UAA, and UGA are stop codons so when they enter the A site of a ribosome they will initiate the termination of translation.