Correct Answer: C. free and fair elections

Correct Answer: A) prevent condensed water from breaking the reaction flask

Explanation

(a) CH\(_3\)COONa\(_{(s)}\) + NaOH\(_{(S)}\) ----> Na\(_2\)CO\(_{3(S)}\) + CH\(_{4(g)}\)

(soda lime)

(b) Sodalime is simply the iron deliquescent form of sodium hydroxide and this is necessary to keep the medium of reaction dry.

Correct Answer: C. new wants always rise

Explanation

It means that people never get enough, that there's always something else that they would want or need. Unlimited wants and needs are one half of the fundamental problem of scarcity that has plagued humanity since the beginning of time. The other half of the scarcity problem is limited resources.

Correct Answer: (A)Apostasy

Correct Answer: D. quatrain

Explanation

(a) The incidence of taxes refers to where the burden of a tax finally rests.

(b)(i) Equity: Tax should be based on a person's ability to pay and there should be equality of sacrifice i.e. the burden of tax should be according to one's ability.

(ii) Certainty: Tax payers should know the amount they are expected to pay, when and how to pay it.

(iii) Convenience: The method and time of tax collection should be convenient to the tax payers.

(iv) Economy: The amount spent in the course of collecting the tax should be smaller than the amount of tax revenue collected

(v) Flexibility: The tax system should not be rigid

(vi) Neutrality: The tax should not unduly affect people's willingness to work, save and invest.

(vii) Simplicity: The tax laws should be easy to understand

Correct Answer: A. decreases

Correct Answer: D. A Scroll

Explanation

(a) Nucleons refer to the protons and neutrons that are found in the nucleus OR Nucleons are nuclear particles which are protons and neutrons.

(b) Graham's law of diffusion states that, at constant temperature and pressure, the rate of diffussion of a gas is inversely proportional to the square root of its density or molar mass or vapour density

(c) Aluminum oxide layer forms on the surface of the metal. The oxide layer forms a potective coating layer which does not flake off.

(d) — atomic radius, Ionic radius, ionization energy. —redox potentials, electronegativity, electron affinity. — melting point, boiling point, electrical conductivity.

(e) — Molecules of real gases have significant attractive forces between them.

— The volume of the molecules of real gases is not negligible.

--- Collision between the molecules are not perfectly elastic.

(f) — Separation of crude oil into its components / petroleurn refining. —Purification of ethanol. —Separation of liquefied air

(g) —Position of the ions in the electrochemical series —Concentration of the ions in the electrolyte —Nature of the electrodes used.

(h)(i) Substitution reaction. (ii) Addition reaction.

(i) — Carbon or soot, Carbon two oxide (carbon II oxide), Water.

(j) Filtration, Crystallisation, Evaporation, decantation, centrifugation