Chemistry
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.
Elements, Compounds & Mixtures
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation — Since elements and compounds are made up of only one kind of atoms and molecules respectively, they are pure substances.
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Related Questions
Which of the following methods is used to separate potassium nitrate and sodium chloride from their mixture ?
- distillation
- crystallisation
- fractional distillation
- fractional crystallisation
Which method is used to separate the components of crude petroleum ?
- distillation
- crystallisation
- chromatography
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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.
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.