This is an complete question, here is a complete question.
Consider the following standard reduction potentials in acid solution:



The weakest reducing agent listed above is:
(a)
(b)
(c) 
(d) 
Answer : The correct option is, (d) 
Explanation :
As we know that,
The substance having highest positive
potential will always get reduced and will undergo reduction reaction and weakest reducing agent or strongest oxidizing agent.
From the standard reduction potentials we conclude that,
having highest positive
potential than the other. So, it will always get reduced and will undergo reduction reaction and weakest reducing agent.
Hence, the correct option is, (d) 
Answer:
The correct answer is Option D (diffraction).
Explanation:
- Diffraction has been known as a mechanism through which light rays divide across clusters of darkness and light rather than into the colors of the rainbow.
- That is the twisting of such an obstacle across the sun. In this case, the challenge has been the door from which the illumination moves and bends.
Other alternatives are not relevant to the specified case. So, the alternative above would be appropriate.
A law in Chemistry ; the elements when arranged in the order of thier atomic numbers show periodic varation of the autmoic structure and of their most properties - Also know as the Mendeleev's Law
There are several formulas for distance. The one you choose to use is the one that expressed distance in terms of the information that you already have.
For example, if you already know the speed and the time you've been traveling, then the formula for the distance you've covered is
D = (speed) times (time) .
The specific heat capacity of ethanol is 2.46 joules per gram.
Now, we may use the equation:
Energy = mass * specific heat capacity * change in temperature
Here we may substitute:
mass = density * volume
Energy = density * volume * specific heat capacity * change in temperature
720 = 0.789 * 35 * 2.46 * ΔT
ΔT = 10.6
The final temperature will be
20 + 10.6
= 30.6 °C