Which of the following will give phosphoric acid on reaction with water
Correct answer: D. All of the above
- A. PCl3 (phosphorus trichloride)
- B. P2O3 (diphosphorus trioxide)
- C. P2O5 (diphosphorus pentoxide)
- D. All of the above
Explanation
(a) PCl3 (phosphorus trichloride): Although PCl3 does liberate hydrochloric acid (HCl) alongside phosphoric acid as a byproduct, the question only asks for phosphoric acid formation as a result of its reaction with water. Therefore, even with the additional product, PCl3 fits the criteria.(b) P2O3 (diphosphorus trioxide): While P2O3 reacts with water to produce a mixture of phosphoric and phosphorous acids, it still generates phosphoric acid, satisfying the question's requirement. The presence of another acid doesn't disqualify it as an option that gives phosphoric acid upon reaction with water.(c) P2O5 (diphosphorus pentoxide): As previously mentioned, P2O5 reacts with water to exclusively form phosphoric acid, making it a clear contender for the answer.Incorrect option:There are actually no incorrect options in this case.Therefore, while option (c) provides the sole product of phosphoric acid, both (a) and (b) still fulfil the requirement of generating phosphoric acid through their reaction with water, leading to (d) "All of the above" being the most comprehensive and accurate answer.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
Practise s-Block and p-Block Elements
1,359 free s-Block and p-Block Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.