Chemistry
Assertion (A): Mixtures are impure substances made up of two or more kinds of elements and compounds mixed together in any proportion.
Reason (R): Homogeneous mixtures have a uniform composition throughout their bulk.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Answer
Both A and R are true but R is not the correct explanation of A.
Explanation — Assertion (A) defines what a mixture is—two or more substances (elements/compounds) physically combined in any proportion, hence "impure."
Reason (R) states a property of one type of mixture (homogeneous = uniform composition). It doesn’t explain why mixtures are impure or their "any proportion" nature, so it isn’t the explanation for Assertion (A).
Related Questions
Which method is used to separate the components of crude petroleum ?
- distillation
- crystallisation
- chromatography
- fractional distillation
Assertion (A): Elements and compounds are pure substances.
Reason (R): Elements and compounds are made up of only one kind of atoms and molecules respectively.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): All compounds contain more than one type of element in their molecules.
Reason (R) : Compounds can be homogeneous or heterogeneous.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): Metalloids are the elements showing some properties of metals and some properties of non-metals.
Reason (R): Metalloids are hard solids.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.