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Question

Consider the following statements regarding matter :
1. Elements cannot be broken down into simpler substances.
2. A compound has variable composition and can be broken down into elements.
3. The solution of sulphur in carbon disulphide is an example of a homogeneous mixture.
Which of the statements given above is/are not correct ?

This question was previously asked in
CDS 2 2026 Maths Question Paper (13-Sep-2026)
The correct answer is
2 only

Analyzing Matter Statements: Elements, Compounds, and Mixtures

The question asks to identify the incorrect statements about matter among the three given options.

Statement Analysis:

  • Statement 1: Elements cannot be broken down into simpler substances.
    This statement is correct. By definition, an element is a pure substance consisting only of atoms that all have the same number of protons in their atomic nuclei. It cannot be broken down into simpler substances by chemical means.
  • Statement 2: A compound has variable composition and can be broken down into elements.
    This statement is incorrect. A compound is formed when two or more elements are chemically bonded together. While a compound can be broken down into its constituent elements (e.g., by electrolysis), its composition is always fixed (constant proportions by mass), not variable. For example, water (H₂O) always consists of hydrogen and oxygen in a fixed ratio.
  • Statement 3: The solution of sulphur in carbon disulphide is an example of a homogeneous mixture.
    This statement is correct. A solution is a type of homogeneous mixture where one substance dissolves completely into another, forming a uniform composition throughout. Sulphur dissolving in carbon disulphide forms such a solution.

Identifying Incorrect Statements

Based on the analysis:

  • Statement 1 is correct.
  • Statement 2 is incorrect due to the mention of "variable composition".
  • Statement 3 is correct.

Therefore, only statement 2 is not correct.

Conclusion

The question asks which statement(s) are not correct. Only Statement 2 fits this criterion.

Final Answer: The final answer is 2 only

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Similar Questions

  1. Which one among the following statements for the gases mentioned below is not correct?


Important Questions from States of Matter

  1. Which is correct statement ?

  2. According to Charle's Law, which of the following is constant?

  3. Which of the following statements is/are correct?

    I. Mass vapor is obtained in the air by evaporation and transpiration.

    II. Water circulation between the oceans and the water bodies is called the water cycle.

  4. Which of the following arenot chemical changes?

    1. Tempering of iron

    2. Conversion of the iron piece into an electro-magnet by passing the current around the iron

    3. Melting of iron

    4. Rusting of iron

    Select the correct answer using the code given below:

  5. Which of the following statements is not correct regarding matter?

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