Which of the following is not a base? A: NH3 B. NaOH C. H3C6H5O7 D. KOH
2 answers:
Answer: Option (C) is the correct answer.
Explanation:
A base is a substance or specie that contains a lone pair of electron or a hydroxyl group, that is, OH group.
For example, , NaOH, and KOH are all bases.
But is not a base because there is no lone pair of electron and no hydroxyl group.
Thus, we can conclude that out of the given options is not a base.
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A and B are experiencing winter. The picture which isn't available here in this question is attached below.
Option C.
<h3><u>Explanation:</u></h3>The earth is tilt by an angle of 23.2° to the vertical plane. This makes the seasonal variation of earth, because in some time of the year, the northern hemisphere faces the sun directly, experiencing summer and then southern hemisphere is away from summer experiencing winter and vice versa. The summer occurs when the place directly faces the sun. And the winter happens when the place obliquely faces the sun or doesn't face the sun at all.
Here in this diagram, we can see that the points A and B are the north pole and the part in northern hemisphere respectively which aren't facing the sun directly, whereas C and D are facing the sun. Thus the southern hemisphere is experiencing summer and the northern hemisphere the winter.
