Mechanical Engineering Exam  >  Mechanical Engineering Questions  >  Assertion (A): Water is not a pure substance.... Start Learning for Free
Assertion (A): Water is not a pure substance.
Reason (R): The term pure substance designates a substance which is homogeneous and has the same chemical composition in all phases.
  • a)
    Both A and R are individually true and R is the correct explanation of A
  • b)
    Both A and R are individually true but R is NOT the correct explanation of A
  • c)
    A is true but R is false
  • d)
    A is false but R is true
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Assertion (A): Water is not a pure substance.Reason (R): The term pure...
Water for all practical purpose can be considered as pure substance because it is homogeneous and has same chemical composition under all phases.
View all questions of this test
Most Upvoted Answer
Assertion (A): Water is not a pure substance.Reason (R): The term pure...
Assertion (A): Water is not a pure substance.
Reason (R): The term pure substance designates a substance which is homogeneous and has the same chemical composition in all phases.

The correct answer is option 'D', which states that Assertion (A) is false but Reason (R) is true.

Explanation:
Definition of a Pure Substance:
A pure substance is a type of matter that has a definite and constant composition. It consists of only one type of atom or molecule. Pure substances can be further classified as elements or compounds.

Water as a Pure Substance:
Water is a chemical compound composed of two hydrogen atoms and one oxygen atom, represented by the chemical formula H2O. It is a common example of a pure substance. Water molecules have the same chemical composition in all phases, whether it is solid (ice), liquid (water), or gas (water vapor). Therefore, the reason (R) provided in the assertion is correct.

Why Assertion (A) is False:
Assertion (A) states that water is not a pure substance, but this statement is incorrect. Water meets the definition of a pure substance as it is composed of the same molecules with a fixed ratio of elements. It does not contain any impurities or other substances mixed in it. Therefore, the assertion (A) is false.

Conclusion:
In conclusion, the assertion that water is not a pure substance is false. Water is indeed a pure substance as it is homogeneous and has the same chemical composition in all phases.
Attention Mechanical Engineering Students!
To make sure you are not studying endlessly, EduRev has designed Mechanical Engineering study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Mechanical Engineering.
Explore Courses for Mechanical Engineering exam

Top Courses for Mechanical Engineering

Assertion (A): Water is not a pure substance.Reason (R): The term pure substance designates a substance which is homogeneous and has the same chemical composition in all phases.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?
Question Description
Assertion (A): Water is not a pure substance.Reason (R): The term pure substance designates a substance which is homogeneous and has the same chemical composition in all phases.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Assertion (A): Water is not a pure substance.Reason (R): The term pure substance designates a substance which is homogeneous and has the same chemical composition in all phases.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): Water is not a pure substance.Reason (R): The term pure substance designates a substance which is homogeneous and has the same chemical composition in all phases.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Assertion (A): Water is not a pure substance.Reason (R): The term pure substance designates a substance which is homogeneous and has the same chemical composition in all phases.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering. Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
Here you can find the meaning of Assertion (A): Water is not a pure substance.Reason (R): The term pure substance designates a substance which is homogeneous and has the same chemical composition in all phases.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Assertion (A): Water is not a pure substance.Reason (R): The term pure substance designates a substance which is homogeneous and has the same chemical composition in all phases.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Assertion (A): Water is not a pure substance.Reason (R): The term pure substance designates a substance which is homogeneous and has the same chemical composition in all phases.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Assertion (A): Water is not a pure substance.Reason (R): The term pure substance designates a substance which is homogeneous and has the same chemical composition in all phases.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Assertion (A): Water is not a pure substance.Reason (R): The term pure substance designates a substance which is homogeneous and has the same chemical composition in all phases.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
Explore Courses for Mechanical Engineering exam

Top Courses for Mechanical Engineering

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev