Correct Answer: B. crops rotation

Explanation

(i)Counter Trade: This is a system of international trade where countries instead of paying cash for the goods they purchase from other countries will pay with their own goods so that the seller is forced to buy their owns goods. (This is the exchange of goods for goods in international trade).

(ii)Entrepot Trade: This is a system of trade where goods imported into a country are re-exported while the goods are still in the same form as they were received.

(iii) Import Trade:This is a system of trade where goods produced in one country are brought into another country for sale.

(iv)Invisible Trade: This is a type of international trade involving intangible products such as services or banking, shipping services which require payment of money.

(b) Barriers to International Trade:

(i) Difference in currencies pose a barrier to international trade.

(ii) Language problems in the negotiation and hiring of interpreter.

(iii) Difference in Business laws and regulations among countries.

(iv) Trade restrictions by countries being created by trading partners when they discover they have adverse balance of trade or payment such as embargoes, duties, quota, cartel.

(v) Religious/cultural problems could also act as impediments to trade.

(vi) Problems of distance also affect international trade because of the additional cost and delay in delivery.

(vii) Differences in weight and measures in different countries affect international trade.

(viii) It requires a lot of documentation.

(ix) Government policies/political differences can affect trade between two countries.

Correct Answer: C) an epiphyte

Explanation

The question is asking for the name of a plant that grows on another plant without causing harm to the host plant. This type of plant is called an epiphyte. Epiphytes are plants that grow on other plants, usually trees, but they do not harm the host plant. Instead, they use the tree or other plant as a support structure to grow towards the sunlight. Epiphytes are common in rainforests where there is a lot of moisture in the air and on the tree trunks. They can also be found in other types of forests and even in gardens. It is important to note that epiphytes are not parasites, which are plants that grow on other plants and harm them by taking nutrients from them. For example, mistletoe is a parasitic plant. It grows on trees and takes nutrients and water from them, which can harm the tree. On the other hand, epiphytes do not harm the host plant. Saprophytes, another option listed in the question, are plants that obtain nutrients from dead or decaying organic matter. They are important in recycling nutrients in ecosystems. Predators and prey, the other options listed, are not relevant to this question as they refer to animals that hunt and are hunted in food webs. In conclusion, the correct answer to this question is Option C: an epiphyte, which is a plant that grows on another plant without causing harm to the host plant.

Correct Answer: A. in spite of

Correct Answer: C. \(35q^3x^4\)

Explanation

rth term of a binomial expansion = \(^nC_r - _1a^{n - (r - 1)} b^{r - 1}\)

n = 7, r = 5 ∴ r - 1 = 4

5th term = \(^7C_4 q^{7 - 4} x^4\)

= \(^7C_4 q^3x^4\)

\(\therefore 35q^3x^4\)

Correct Answer: D. composed

Explanation

nervous; easily agitated or alarmed.

composed; having one's feelings and expression under control; calm.

Correct Answer: B. fathers narrate animal stories

Correct Answer: A. his inability to secure Naboth's vineyard.

Explanation

King Ahab became sad and discontent in his palace as a result of A. his inability to secure Naboth's vineyard. This event is recorded in the Bible in 1 Kings 21. Ahab desired Naboth's vineyard, but Naboth refused to sell or exchange it. Ahab's discontent and sadness stemmed from his frustration at not being able to acquire the vineyard. This led to the events that unfolded with the involvement of Jezebel and the tragic fate of Naboth.

Correct Answer: C. 15

Explanation

(a)(i) Acid anhydride means acid without water. e.g. SO\(_2\), CO\(_2\), etc.

(ii) HCI react with metals more electropositive than hydrogen to liberate hydrogen gas.

-HCI reacts with bases or alkali to produce salt and water only.

-They react with trioxocarbonate (IV) and hydrogen trioxocarbonate (IV) to literate carbon (IV) oxide.

(b)(i) H\(_2\)SO\(_4\) can form a neutral salt and also an acid salt while NHO\(_3\) can only form a neutral salt.

(ii) Both copper and iron have low standard electrode potential and only iron reacts with the dilute acid because it is more active than copper

(iii) The zinc dust has larger area of contact for the reaction to take place unlike the zinc granules.

(c)(i) Activation energy in the combined energy which the reactant particles must have in order to react or for a reaction to occur.

(iii) The heat of reaction of the mineral acids with sodium hydroxide is constant because the only change that actually occurs during the reaction is the formation of water molecule which has an approximately constant value of- 57.4 kJmol\(^{-1}\)

(d)(i) Q\(_{(s)}\) has higher entrophy because the molecules of Q\(_{(s)}\) are free to move than that of Q\(_{(s)}\)

(ii) Decrease in temperature will favour the reverse reaction.