Question

Pure water is:
(A) Colorless and opaque
(B) Colorless and transparent
(C) Colored and transparent
(D) Colorless, odorless and transparent

Answer 1

To answer this question, you must recall the meaning of the terms given in the following question. We know that a colorless substance is one that shows no colour. An opaque substance is one that does not allow light rays to pass through it and thus we cannot see through such objects. Transparent substances are exactly the opposite of opaque substances, that is, it allows light rays to pass through it and we can see through such objects with the naked eye.

Complete step by step solution
We consider the options one by one. To check whether the answer is correct, you must recall what water looks and smells like.
In option A, we have colorless and opaque. We know that water does not have any specific colour, i.e. it is colorless. We know that water is not opaque. We can see through a given sample of water. Thus it is transparent, not opaque.
In option B, we have colorless and transparent. Water is both transparent and colorless. Thus option B is correct but we consider other options as well to find the most suitable answer.
In option C, we have colored and transparent. We know that water is a colorless liquid, so option is C.
In option D, we have colorless, odorless and transparent. Water does not have any specific smell. So option D is more appropriate.
The correct answer is D.

Note
Pure water, also known as distilled water is water that does not contain any impurities in it. The purification of water can be done by a variety of methods that involve the removal of suspended undesirable solids, extra chemicals, gaseous impurities and biological impurities present in the water. Purification of water is necessary in order to make it suitable for consumption.