Correct Answer: C. 4 A

Explanation

To find the fuse rating, we first need to calculate the current drawn by the electric device.

Given:

Power (P) = 1 KW = 1000 W

Voltage (V) = 250 V

The relationship between Power, Voltage, and Current (I) is:

P = V × I

We need to find the current (I):

I = P / V

Substitute the given values:

I = 1000 W / 250 V

I = 4 A

The fuse rating should be slightly higher than or equal to the normal operating current to prevent the fuse from blowing during normal operation, but also low enough to protect the device in case of an overload. In this case, the calculated normal operating current is 4 A.

Looking at the options:

A. 2 A (too low, would blow immediately)

B. 3 A (too low, would blow immediately)

C. 4 A (exactly the operating current, provides protection at this level)

D. 5 A (a common standard rating, slightly above 4A, which is also a practical choice for safety margin)

If the device draws exactly 4A, a 4A fuse would be the precise rating. It would blow if the current exceeds 4A, protecting the device. While in practice, a slightly higher standard fuse (like 5A) might be chosen to avoid nuisance blowing due to minor current fluctuations or inrush current, based on the direct calculation and the provided options, 4A is the current the device is designed to draw. Therefore, a 4A fuse is technically suitable and available as an option.

The final answer is 4 A.

Correct Answer: C. counter-accusation

Correct Answer: A) Ethyne

Explanation

Ethyne, also known as acetylene, is the correct answer because it undergoes addition reactions due to the presence of a triple bond between the two carbon atoms. The triple bond in ethyne consists of one sigma bond and two pi bonds. In addition reactions, the pi bonds break and new atoms or groups of atoms are added to the carbon atoms, resulting in a more saturated compound.

On the other hand, butane and pentane are alkanes, which have only single bonds between the carbon atoms. Alkanes are saturated hydrocarbons, and they do not readily undergo addition reactions. Instead, they typically undergo substitution reactions.

Ethanol is an alcohol, meaning that it has a hydroxyl group (-OH) attached to a carbon atom. Alcohols mainly undergo substitution and elimination reactions, but not addition reactions.

Tetrachloromethane, also known as carbon tetrachloride, is a compound with four chlorine atoms bonded to a central carbon atom. This compound is already saturated and does not undergo addition reactions.

In summary, ethyne is the only compound among the given options that undergoes addition reactions due to the presence of the triple bond.

Correct Answer: C. Kawthar

Correct Answer: B. He takes an unfavourable position concerning our problems

Correct Answer: A. overdraft

Explanation

\(Mean, (\bar {x}) = A + \frac{\sum fd}{\sum f}\)

= \(24.5 + \frac{-300}{120}\)

= \(24.5 - 2.5\)

= 22.0

Correct Answer: C. the possibility of conflict in management is virtually non-existent

Correct Answer: D. experienced

Explanation

Novice: a person new to and inexperienced in a job or situation.

Experienced:having gained knowledge or skill in a particular field over time.

Correct Answer: D. fardkifayah