
How would you separate a mixture of rice, sugar and iron filings?
Important Questions on Matter: Elements, Compounds and Mixtures


At a refinery, petroleum is separated into several components by a process called fractional distillation using a fractionating column. Which of the following statement is incorrect about the process?
(I) Temperature decreases from the bottom to the top of the column
(II) At each level in the column only one compound is collected
(III) The fraction collecting at the top of the column is less volatile
(IV) The fraction with the highest boiling point condenses first and gets collected near the base of the fractionating column.



Sample 'A' contains iron filings and sulphur powder, Sample 'B' is iron sulphide. Sample 'A' and 'B' are taken on a watch glass and a bar magnet is rolled over both.
You will observe that:



Describe the various steps involved in the separation of iodine, iron filings and salt from a mixture.




Give the characteristic test for the following gas.







Give reason for the following statement:
Magnetic separation cannot be used to separate a mixture of copper and sulphur.

