Correct Answer: B. associational

Explanation

(a)(i) Acetylene

(ii) Ethene

(b) The structural formula of acetylene (ethyne) is CH=CH. The process of converting acetylene to neoprene rubber is polymerization.

(i) The product of complete dehydration of potatoes is mainly starch.

(ii) the conversion of potatoes to ethanol involves the following process. Pressure cook the potatoes to release the starch granules. Treat the starch granules with malt and the malt supplies an enzyme called diastase which hydrolyse the starch to a sugar, maltose. At room temperature, yeast is then added which supplies the enzyme maltose that catalyse the hydrolysis of maltose to glucose. Finally, another enzyme of yeast, zymase, catalyses the decomposition of glucose to ethanol and carbon(IV) oxide.

i.e. \(C_6H_{12}O_{6(aq)} \to 2C_2H_5OH_{(aq)} + 2CO_{2(g)}\)

zymase

(iii) The technique is the distillation process. Give the diagram of the distillation

Correct Answer: D. have

Correct Answer: D. should

Explanation

(a) Characteristics of Sedimentary Rocks

(1) Sedimentary rocks are stratified rocks or rocks that show distinct layers or strata

(2) They are non-crystalline

(3) They are usually soft

(4) Not resistant to erosion

(5) They are permeable

(6) They may be coarse or fine grained depending on the nature of materials deposited.

(7) They are fossilized rocks / they contain fossils of plants and animals.

(8) Examples are sandstone, coal, limestone.

(b) Sedimentary rocks can be formed mechanically, organically and chemically

(i) Mechanically formed Sedimentary Rocks

These are derived from sediments of pre-existing rocks. The rock debris are usually deposited by agents of erosion such as water, wind or glacier. The deposited materials are pressed together to become solid by the weight of overlying deposits. This process of solidification is called compaction or cementation. They may form conglomerates.

(ii) Organically formed Sedimentary Rocks

These are formed from the remains of living organisms such as plants and animals. The remains of animals like corals or shellfish form calcareous rocks. Those formed from the remains of vegetation / plants such as forest or swamps are called carbonaceous rocks. Examples are limestone, chalk, etc.

(iii) Chemically formed Sedimentary RocksThese are rocks formed from precipitation from other rock solutions or certain minerals from solution of salt. They are often referred to as evaporates. They are also from crystallization. Examples include potash, gypsum etc.

Correct Answer: B. 2/3

Correct Answer: B. stubborn

Explanation

(a)

(b)(i) we have sin 75\(^o\) = \(\frac{x}{11}\) and this will give x = 10.625m. Since the ladder has moved up by 0.2 , the new point where the ladder touches the wall is 0.2 + 10.625 = 10.825m.

Then sin\(\theta\) = \(\frac{10.825}{11}\)

Sin\(\theta\) = 0.9841 and \(\theta\) = sin\(^{-1}\)(0.9841) = 79.77\(^o\) = 80\(^o\)

(b)(ii) Cos 75\(^o\) = \(\frac{y}{11}\) so that y = 2.2847m

Similarity, cos 79.77 = \(\frac{q}{11}\) and q = 1.9536m. Therefore, the distance the ladder was dragged = 2.8470 - 1.9536 = 0.8934m = 1m

Correct Answer: C) firm

Explanation

This Economics question is asking about the shape of curves in a perfectly competitive market. The options are about the shape of the demand and supply curves.

In a perfectly competitive market, there are many buyers and sellers who are all selling identical products, and there are no barriers to entry or exit. This means that no individual seller or buyer has any control over the market price.

The correct answer to this question is Option C: firm

Correct Answer: A. is not exempted from all forms of ibadah