JAMB Exam > JAMB Videos > Chemistry for JAMB > Pure and Impure Substances - 2
Pure and Impure Substances - 2 Video Lecture | Chemistry for JAMB
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FAQs on Pure and Impure Substances - 2 Video Lecture - Chemistry for JAMB
| 1. What are pure substances? |  |
Ans. Pure substances are substances that are made up of only one type of particle or molecule. They have a fixed and definite composition throughout and cannot be separated into simpler components by any physical means. Examples of pure substances include elements and compounds.
| 2. What are impure substances? | |
Ans. Impure substances are substances that contain more than one type of particle or molecule. They have variable compositions and can be separated into their individual components through physical means such as filtration or distillation. Examples of impure substances include mixtures and solutions.
| 3. How can pure substances be identified? | |
Ans. Pure substances can be identified through various methods such as physical and chemical tests. Physical tests include measuring the melting point and boiling point, observing the color and appearance, and conducting density measurements. Chemical tests involve reactions with specific reagents to determine the presence of certain elements or compounds.
| 4. What is the importance of pure substances in scientific research? | |
Ans. Pure substances are essential in scientific research as they provide a consistent and reliable basis for experimentation. By using pure substances, researchers can accurately study the properties, behavior, and reactions of specific elements or compounds. It allows for more precise data analysis and helps in formulating scientific theories and principles.
| 5. Can impure substances be purified? | |
Ans. Yes, impure substances can be purified through various methods depending on their nature. Filtration is commonly used to separate insoluble impurities from a liquid or gas. Distillation is used to separate components with different boiling points. Other techniques like chromatography and crystallization can also be employed to purify impure substances.
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Nov 24, 2024 Last updated |
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