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In option A, the oxidation number of Nitrogen increased from +2 to +4. In Option B, the oxidation number of Nitrogen decreased from +2 to +1 (Bearing in mind that the O.N of chlorine in hypochlorate, OCl\(^-\) is +1) In Option C, the oxidation number of Nitrogen decreased from +2 to +1 In Option D, the oxidation number of Nitrogen decreased from +2 to +1 (Bearing in mind that the O.N of bromine in hypobromate OBr\(^-\) is +1) Therefore, the answer is option A

In the electrolysis of a concentrated solution containing H\(^+\), Cu\(^{2+}\), OH\(^-\) and Cl\(^-\) ions using platinum electrodes, the Cu\(^{2+}\) ions will be discharged at the cathode. During electrolysis, ions migrate towards the oppositely charged electrode. Positive ions (cations) like H\(^+\) and Cu\(^{2+}\) will be attracted to the negative electrode (cathode). At the cathode, the ion that is easier to reduce (requires less energy to gain electrons) will be discharged first. In this case, Cu\(^{2+}\) ions are more easily reduced to Cu(s) than H\(^+\) ions are to H\(_2\)(g). The reaction at the cathode will be the reduction of Cu\(^{2+}\) ions: Cu\(^{2+}\)(aq) + 2e\(^-\) → Cu(s). Anode reaction: The reaction at the anode will be the oxidation of water: 2H\(_2\)O(l) → O\(_2\)(g) + 4H\(^+\)(aq) + 4e-

- Ethene is a plant hormone which causes fruit to ripen. - Ethene is used routinely within the food industry to provide controlled ripening during storage and transport or when fruit is displayed in shops, in sealed packages.

FROM the diagram above 100 + a = 180 (sum of angles on a straight line) a = 180 - 100 = 80º Z = 80 + 40 = 120º (exterior angles of a triangle = sum of the two opp. interior angles) Z = x = 120º (corresponding angles are equal).

The bearing of R from S = 180 + 44 = 224º, because -Following the clockwise movement at 90º: -NORTH -EAST, EAST-SOUTH, SOUTH - WEST & WEST - NORTH - It is observed that R is situated between SOUTH - WEST poles on S

The sentence is using a conditional statement in the past perfect tense to express a hypothetical situation and its result. "If the rain hadn't fallen" implies that the rain did fall, and as a result, "we wouldn't have missed the match." This means that because the rain fell, they did not watch the match. Therefore, option B correctly explains the information conveyed in the sentence.

A. He bit off people's jaws: This option is not the answer because it takes the expression "jawing away" too literally. In this context, "jawing away" is an informal phrase that means talking or chatting continuously, not physically biting off people's jaws. B. He was always chewing in the class: This option is incorrect because it misinterprets the meaning of "jawing away." The phrase refers to talking or chatting, not chewing. C. He was always making trouble for the class: This option is not the answer because while "jawing away" might imply being talkative, it doesn't necessarily mean causing trouble. It's more about continuous talking or chatter. D. He talked continuously in the class. - This option is correct because it accurately captures the meaning of "jawing away" in this context. The sentence indicates that the new boy talked a lot in class, causing the class to become tired of it. So, option D is the best explanation for the information conveyed in the sentence.

A. He expected that the men would cooperate with him: This option is the best explanation because "pull together" is a common idiom that means to work together in cooperation and harmony. The sentence suggests that the new Headmaster hoped for unity and collaboration among his team.

The sentence implies that when the trader paid in full, his order was not reduced or pruned down. This suggests that full payment ensured the fulfilment of the trader's order without any reduction in quantity or size.

The sentence “The men were not pawns in someone else’s political game” uses “pawns” metaphorically to refer to people who are controlled or manipulated by others, much like pieces in a game of chess. By saying they were not pawns, the speaker is emphasising that the men were not being used or controlled by anyone else for political purposes. Instead, it suggests that they acted independently and out of their own will.

The sentence "The crisis ended as suddenly as it began" implies that the crisis came to a halt in a very short period of time, just like how it started abruptly.

The sentence expresses that the speaker will not be complaining about a lack of excitement in their new job. This indicates that the job is indeed exciting or interesting to them. Therefore, option B is the most appropriate explanation.

The term "parried" in this context means that the Governor skillfully avoided or dodged all the questions posed by the journalist, indicating evasion rather than direct answering. Therefore, option B provides the most accurate explanation.

The sentence implies that if the speaker visits England in the future, there is a possibility (but not a certainty) that they will go to Manchester City. Option A accurately captures this conditional statement.

The sentence suggests that the man shows determination and decisiveness ("puts his foot down") when he believes in his actions or decisions. This indicates a firmness of character rather than a desire to assert dominance, make an impact everywhere, or oppress others. Option D aligns most closely with the idea of demonstrating firmness in one's convictions.