Which of these terms is defined as follows: the chemical compound made of two hydrogen atoms and one oxygen atom?
Difficulty: Medium
About this MCQ
This Medium Science and Inventions question asks: Which of these terms is defined as follows: the chemical compound made of two hydrogen atoms and one oxygen atom? The correct choice is A. Water (H2O). Read the options below, commit to one, then use the explanation to see why that choice holds and why the others do not.
Science and Inventions items like this one are written for Pakistan exams such as CSS, FPSC, PPSC, and NTS. The difficulty label is a hint about how much of the topic the stem assumes, not a score. Tags and exam names, when they are present, tell you where else the same idea is tested. Previous and next links stay in Science and Inventions so you can continue the subject. Related questions point at nearby stems if you want another angle on the same idea.
Treat the explanation as part of the question, not a footnote. If you missed it, reread the stem against the correct option before you open the next Science and Inventions item. A timed quiz is the same pool with a clock and a score. A past paper is a full sitting rather than this single question.
- A. Water (H2O) ✓
- B. Marie Curie
Why not B: “Marie Curie” does not fit this question. The answer is Water (H2O).
- C. Photosynthesis
Why not C: “Photosynthesis” does not fit this question. The answer is Water (H2O).
- D. DNA
Why not D: “DNA” does not fit this question. The answer is Water (H2O).
Correct answer
A. Water (H2O)
Explanation
Water (H2O) is the term that matches “Which of these terms is defined as follows: the chemical compound made of two hydrogen atoms and one oxygen atom” (option A). Option B (Marie Curie) does not fit this question. Option C (Photosynthesis) does not fit this question. Option D (DNA) does not fit this question. For this Science and Inventions question, the accepted answer is Water (H2O).
Source: General Knowledge Official Reference Guide
Tags: FPSC, PPSC, General Knowledge, NTS, Science and Inventions
Submitted by: MCQsHub Editorial
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