Correct Answer: C. \(\frac{25}{9} p^2r\)

Explanation

p = \(\frac{3}{5} \sqrt{\frac{q}{r}}; \frac{5p}{3} = \sqrt{\frac{q}{r}}\)

= (\(\frac{5}{3}p\))²

= \(\frac{q}{r}\)

= \(\frac{25p^2}{9} = \frac{q}{r}\)

q = \(\frac{25}{9} p^2 r\)

Correct Answer: C. diligence

Correct Answer: B. expand its economy and political base

Correct Answer: D. unsolicited mails

Correct Answer: D. God's commandment

Correct Answer: (b) The car occupant

Explanation

Community Senior High School, Tafawa Balewa, P.M.B 1180, 25th September, 2020. The Principal, Community Senior High School, Alausa Ikeja, Lagos. Dear sir, OPINION ON SOME PRACTICES AMONG STUDENTS THAT SHOULD BE DISCOURAGED AND HABITS AMONG TEACHERS THAT SHOULD BE PROMOTED.

I wish to heartily appreciate you sir, on your selflessness, high manner of responsibility and. humility as the principal of air esteemed school. In addition, I also want to congratulate you on being a great leader and good example to the teachers and students of this school.

I want to bring to your notice some practices among students that should be discouraged and habits that should be promoted among the teachers so as to provide a better learning environment.

These practices among the students are negative and do not speak well of our school. One of these negative practices is gambling. Students engage in gambling which place them at a risk of being unfocused on their studies. Also, it places them at a risk of losing their feeding allowances because they have to stake bets with the only money on them and thereby when they lose such bets, they are left to go hungry. These gambling activities have more often than not led to outbreaks of arguments and fights among the students. More importantly, this practice does not encourage students to be more responsible but instead be careless and reckless.

Therefore, I would like to suggest that this practice of gambling be discouraged and terminated by setting in place rules and regulations that will guide against gambling and also enforce suitable punishments for any student caught in the act.

Another negative practice which has been embraced by the students in recent times is examination malpractices. This of course is a dishonest and wrong way to achieve good and excellent grades.

Students who engage in this practice are likely not to pay attention in class nor read their books and prepare adequately for examinations because they believe they can smuggle their notebooks, textbooks or any foreign material into the examination hall.

This encourages laziness and unseriousness in students and I would like to suggest that more examination rules and regulations be set; for example students should be thoroughly searched before allowed to come into the examination hall and adequate number of examination invigilators be placed in the hails too.

Our teachers are very hardworking and also very committed to teaching and this is very commendable. I, on behalf of other students of this prestigious school, hope that these habits are promoted more and more in our teachers. We hope for more teachers who take their time to teach to the understanding of their students and teachers who engage more with their students.

In conclusion, I would like to thank you for the time taken to read through this letter and earnestly hope that necessary steps be taken to put an end to negative practices exhibited among the students and the promotion of positive habits among the teachers.

Yours faithfully

MBA, OLUCHI MARY

Explanation

(a) (i) - sulphur (IV) oxide /SO\(_2\)

- nitrogen (IV) oxide / NO\(_2\)

- nitrogen (II) oxide / NO

- carbon (II) oxide / (CO)

- methane / CH\(_4\)

(ii) Large lumps have smaller surface area to volume ratio than the broken pieces which has a greater surface area / increased exposed surface area. This makes the broken pieces to collide more frequently.

OR

The greater the rate of frequency of successful collisions, the greater the rate of reaction hence for the pieces of coal more reactant particles are exposed at the surface thereby increasing the frequency of successful collisions between reactant particles.

(iii) methane gas / CH\(_4\)

(iv) coke / carbon

(b) (i) - chlorine dioxide / (ClO\(_2\))

- sulphur (IV) oxide SO\(_2\)

- hydrogen peroxide / H\(_2\)O\(_2\)

- sodium peroxide Na\(_2\)O\(_2\)

(ii) - Manganese (IV) oxide / MnO\(_2\)

- Lead (IV) oxide / PbO2\(_2\)

(iii) - CaO

- MgO

- Na\(_2\)O

- K\(_2\)O

(iv) Aluminium oxide (Al\(_2\)O\(_3\)), ZnO, PbO, SnO\(_2\),SnO, PbO\(_2\)

(v) - nitrogen (IV) oxide / NO2\(_2\)

(ii) Redox reaction

(iii) Because Iron (II) ions is oxidized to iron (III) ions / chlorine is reduced to chloride ions / chlorine gas oxidizes iron (II) ions to iron (III) ions and in the process chlorine is reduced to chloride ions / oxidation number of iron increases from +2 to +3 while that of chlorine decreases from 0 to -1.

&nbs

Correct Answer: D) bonded warehouse

Explanation

When goods are discharged from ships and import duties have not been paid, they are kept in a bonded warehouse. A bonded warehouse is a special type of warehouse where imported goods can be stored without paying import duties or taxes until they are needed or until the duties and taxes are paid. This allows businesses to store goods and defer the payment of import duties until they are ready to sell or distribute the goods.

In a bonded warehouse, the goods are under the control of customs authorities and cannot be removed without their permission. This ensures that the duties and taxes will be paid before the goods are released for sale or distribution. It provides a way for businesses to store imported goods securely and legally without immediately paying import duties.

Therefore, the correct option for this question is option D: bonded warehouse.

Correct Answer: D. An automobile plant