1. Two students “A” and “B” got the mixture of iron filings and sulphur powder. “A”
heated this mixture strongly but “B” kept it as such. They divided their samples
further into three parts and did some tests. Tabulate their observations when:
(a) both added dilute HCl to a part of their samples.
(b) both added carbon disulphide to another part.
(c) both used magnet to separate its constituents on the last part of their
respective samples.
(Answer in the Tabular form).
2. Give one example of Tyndall effect observed in nature.
3. Find the ratio by mass of combining elements in i) Magnesium oxide and ii)
Hydrogen sulphide. [ Given Atomic mass of magnesium = 24u, oxygen = 16u,
sulphur = 32u, hydrogen = 1u]
4. Define relative atomic mass.
Please answer this question by 6th August . Do not copy paste answers from Google. Please try to answer from NCERT Textbook.
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Answer:
1. c)
Explanation:
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