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ICSE Class 10 Chemistry Question 20 of 22

Solved 2024 Question Paper ICSE Class 10 Chemistry — Question 19

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19
Question

Question 8(i)

Choose the correct answer from the list given below:

zinc blende,C2H2,calamine, CH, haematite\boxed{\text{zinc blende}, \text{C}_2\text{H}_2, \text{calamine, CH, haematite}}

(a) The ore which can be concentrated by magnetic separation.

(b) Empirical formula of Ethyne.

Answer

(a) Haematite
Reason — Haematite is an iron ore that can be concentrated by magnetic separation because it contains iron, which is magnetic.

(b) Molecular formula of Ethyne is C2H2. The simplest whole-number ratio of carbon to hydrogen in Ethyne is 1:1. Therefore, the empirical formula of Ethyne is CH.