Class 9 Exam > Class 9 Questions > Statement A: Atoms can exist independently.St...
Start Learning for Free
Statement A: Atoms can exist independently.
Statement B: The law of constant proportions is applicable only to pure chemical compounds.
Which of the two Statements is true?
- a)Statement A
- b)Statement B
- c)Both the Statement A and B
- d)Neither Statement A nor Statement B
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Statement A: Atoms can exist independently.Statement B: The law of con...
An atom cannot exist independently. The law of constant proportions is applicable only to pure chemical compounds. So, only statement B is correct.
Most Upvoted Answer
Statement A: Atoms can exist independently.Statement B: The law of con...
Statement A: Atoms can exist independently.
Statement B: The law of constant proportions is applicable only to pure chemical compounds.
Explanation:
Statement A: Atoms can exist independently.
- This statement is not entirely true. While atoms are the basic building blocks of matter, they do not exist independently in nature. Atoms are constantly interacting with other atoms to form molecules or compounds.
- Atoms combine with other atoms through chemical bonds to form stable structures. These structures can be simple, such as diatomic molecules like oxygen (O2) or complex, such as the arrangement of atoms in a crystal lattice.
- However, isolated atoms can exist in certain conditions, such as in a vacuum or in highly controlled laboratory settings. But in general, atoms are more commonly found in compounds or molecules.
Statement B: The law of constant proportions is applicable only to pure chemical compounds.
- This statement is true. The law of constant proportions, also known as the Law of Definite Proportions, states that in a pure chemical compound, the elements are always present in the same proportion by mass.
- This means that regardless of the amount or source of the compound, the ratio of the elements in the compound will always be the same. For example, water (H2O) will always have a ratio of 2 hydrogen atoms to 1 oxygen atom by mass.
- This law does not apply to mixtures, where the components can vary in proportion. In mixtures, the elements or compounds are not chemically combined, and their proportions can be changed without breaking any chemical bonds.
Conclusion:
- Statement A: Atoms can exist independently - False
- Statement B: The law of constant proportions is applicable only to pure chemical compounds - True
Therefore, the correct answer is option 'B' - Statement B.
Statement B: The law of constant proportions is applicable only to pure chemical compounds.
Explanation:
Statement A: Atoms can exist independently.
- This statement is not entirely true. While atoms are the basic building blocks of matter, they do not exist independently in nature. Atoms are constantly interacting with other atoms to form molecules or compounds.
- Atoms combine with other atoms through chemical bonds to form stable structures. These structures can be simple, such as diatomic molecules like oxygen (O2) or complex, such as the arrangement of atoms in a crystal lattice.
- However, isolated atoms can exist in certain conditions, such as in a vacuum or in highly controlled laboratory settings. But in general, atoms are more commonly found in compounds or molecules.
Statement B: The law of constant proportions is applicable only to pure chemical compounds.
- This statement is true. The law of constant proportions, also known as the Law of Definite Proportions, states that in a pure chemical compound, the elements are always present in the same proportion by mass.
- This means that regardless of the amount or source of the compound, the ratio of the elements in the compound will always be the same. For example, water (H2O) will always have a ratio of 2 hydrogen atoms to 1 oxygen atom by mass.
- This law does not apply to mixtures, where the components can vary in proportion. In mixtures, the elements or compounds are not chemically combined, and their proportions can be changed without breaking any chemical bonds.
Conclusion:
- Statement A: Atoms can exist independently - False
- Statement B: The law of constant proportions is applicable only to pure chemical compounds - True
Therefore, the correct answer is option 'B' - Statement B.
Attention Class 9 Students!
To make sure you are not studying endlessly, EduRev has designed Class 9 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 9.
|
Explore Courses for Class 9 exam
|
|
Similar Class 9 Doubts
Top Courses for Class 9View all
Statement A: Atoms can exist independently.Statement B: The law of constant proportions is applicable only to pure chemical compounds.Which of the two Statements is true?a)Statement Ab)Statement Bc)Both the Statement A and Bd)Neither Statement A nor Statement BCorrect answer is option 'B'. Can you explain this answer?
Question Description
Statement A: Atoms can exist independently.Statement B: The law of constant proportions is applicable only to pure chemical compounds.Which of the two Statements is true?a)Statement Ab)Statement Bc)Both the Statement A and Bd)Neither Statement A nor Statement BCorrect answer is option 'B'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Statement A: Atoms can exist independently.Statement B: The law of constant proportions is applicable only to pure chemical compounds.Which of the two Statements is true?a)Statement Ab)Statement Bc)Both the Statement A and Bd)Neither Statement A nor Statement BCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Statement A: Atoms can exist independently.Statement B: The law of constant proportions is applicable only to pure chemical compounds.Which of the two Statements is true?a)Statement Ab)Statement Bc)Both the Statement A and Bd)Neither Statement A nor Statement BCorrect answer is option 'B'. Can you explain this answer?.
Statement A: Atoms can exist independently.Statement B: The law of constant proportions is applicable only to pure chemical compounds.Which of the two Statements is true?a)Statement Ab)Statement Bc)Both the Statement A and Bd)Neither Statement A nor Statement BCorrect answer is option 'B'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Statement A: Atoms can exist independently.Statement B: The law of constant proportions is applicable only to pure chemical compounds.Which of the two Statements is true?a)Statement Ab)Statement Bc)Both the Statement A and Bd)Neither Statement A nor Statement BCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Statement A: Atoms can exist independently.Statement B: The law of constant proportions is applicable only to pure chemical compounds.Which of the two Statements is true?a)Statement Ab)Statement Bc)Both the Statement A and Bd)Neither Statement A nor Statement BCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Statement A: Atoms can exist independently.Statement B: The law of constant proportions is applicable only to pure chemical compounds.Which of the two Statements is true?a)Statement Ab)Statement Bc)Both the Statement A and Bd)Neither Statement A nor Statement BCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9.
Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Here you can find the meaning of Statement A: Atoms can exist independently.Statement B: The law of constant proportions is applicable only to pure chemical compounds.Which of the two Statements is true?a)Statement Ab)Statement Bc)Both the Statement A and Bd)Neither Statement A nor Statement BCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Statement A: Atoms can exist independently.Statement B: The law of constant proportions is applicable only to pure chemical compounds.Which of the two Statements is true?a)Statement Ab)Statement Bc)Both the Statement A and Bd)Neither Statement A nor Statement BCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Statement A: Atoms can exist independently.Statement B: The law of constant proportions is applicable only to pure chemical compounds.Which of the two Statements is true?a)Statement Ab)Statement Bc)Both the Statement A and Bd)Neither Statement A nor Statement BCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Statement A: Atoms can exist independently.Statement B: The law of constant proportions is applicable only to pure chemical compounds.Which of the two Statements is true?a)Statement Ab)Statement Bc)Both the Statement A and Bd)Neither Statement A nor Statement BCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Statement A: Atoms can exist independently.Statement B: The law of constant proportions is applicable only to pure chemical compounds.Which of the two Statements is true?a)Statement Ab)Statement Bc)Both the Statement A and Bd)Neither Statement A nor Statement BCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Class 9 tests.
|
|
Explore Courses for Class 9 exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up
within 7 days!
within 7 days!
Takes less than 10 seconds to signup