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With the help of labelled diagram describe in brief an activity to show sublimation of Ammonium Chloride?
Ref: https://edurev.in/question/475798/With-the-help-of-labelled-diagram-describe-in-brief-an-activity-to-show-sublimation-of-Ammonium-Chlo
Sublimation: The process of converting solid form of a substance directly into vapour form is called sublimation. In sublimation no liquid state is observed. This is a reversible process.
The substances that can undergo sublimation are:
Ex: camphor, naphthalene,anthracene and ammonium chloride
Activity:
1. Take some ammonium chloride. Crush it and put it in a china dish.
2. Put an inverted funnel over the china dish.
3. Put a cotton plug on the stem of the funnel, as shown in the diagram below.
4. Now, heat the china dish slowly with the help of a Bunsen burner and observe.
5. Ammonium chloride which is in the solid state on exposure to heat will directly change into the vapour state.
6. The vapours on rising up in the funnel will start condensing and form crystals of ammonium chloride.
Ammonium chloride is the molecule which on heating changes directly into gaseous state. When vapours of Ammonium chloride collected then solid Ammonium chloride is formed.
NH4Cl(Solid) ⟺ NH4Cl (vapour)
Observation: A change of state directly from solid to gas without changing into liquid state (or vice versa) is observed, this phenomenon is called sublimation.
FAQs on Solution - Class 9
| 1. What are the eligibility criteria for Class 9 exams? |  |
Ans. The eligibility criteria for Class 9 exams may vary depending on the educational board or institution. Generally, students who have successfully completed Class 8 are eligible to appear for Class 9 exams. However, it is recommended to refer to the specific guidelines provided by the respective educational board or institution.
| 2. How can I prepare effectively for Class 9 exams? | |
Ans. To prepare effectively for Class 9 exams, it is important to create a study schedule and allocate dedicated time for each subject. Break down the syllabus into smaller topics and study them thoroughly. Utilize textbooks, reference materials, and online resources to enhance your understanding. Practice solving previous year question papers and sample papers to familiarize yourself with the exam pattern. Regular revision and taking mock tests can also help improve your preparation.
| 3. Are there any additional resources available for Class 9 exam preparation? | |
Ans. Yes, there are various additional resources available for Class 9 exam preparation. Online platforms offer video tutorials, interactive quizzes, and study materials specifically designed for Class 9 students. Additionally, there are educational apps and e-learning platforms that provide access to a wide range of study materials, practice questions, and mock tests. It is advisable to explore these resources to supplement your learning and enhance your exam preparation.
| 4. How can I manage my time effectively during the Class 9 exam? | |
Ans. Time management during the Class 9 exam is crucial to ensure that you can attempt all the questions within the given time limit. Start by allocating specific time durations for each section or question, depending on the weightage and difficulty level. Read the instructions carefully before answering and prioritize the questions you are confident about. It is advisable to attempt the easier questions first to build momentum and then tackle the more challenging ones. Regular practice and mock tests can help improve your speed and efficiency in managing time during exams.
| 5. What is the importance of regular revision for Class 9 exams? | |
Ans. Regular revision is essential for Class 9 exams as it helps reinforce the concepts and information studied throughout the academic year. By revising regularly, you can strengthen your understanding, identify any gaps in knowledge, and improve your retention of important topics. It also aids in familiarizing yourself with the exam format and allows you to practice answering questions within the given time limit. Regular revision ensures that you are well-prepared and confident to perform well in the Class 9 exams.
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Nov 27, 2024 Last updated |
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