Question

Properties of a compound are different from its constituents, while a mixture shows the properties of its constituent elements. Justify this statement with the example of iron and sulphur.

CBSE Class IX Science SA 1 ( 2 marks)

Answer 1

When a bar magnet is brought closer to the mixture of iron filings and sulphur powder, iron
particles stick to the magnet, while in case of iron sulphide, no change will be observed.

When a mixture of iron and sulphur is added to carbon disulphide, sulphur dissolves, while
in case of iron sulphide, no change is observed.

Answer 2

Answer: WHEN IRON FILLINGS ARE MIXED WITH SULPHUR A MIXTURE IS FORMED.WHEN YOU BRING A MAGNET NEAR THIS MIXTURE,THE IRON FILLINGS WILL GET ATTRACTED TOWARDS IT.ALSO WHEN YOU GRIND AND HEAT THE MIXTURE FORMED ABOVE,A COMPOUND WILL BE FORMED WHOSE IRON ELEMENT WILL NOT GET ATTRACTED TOWARDS THE MAGNET WHEN MAGNET IS BROUGHT CLOSE TO IT.

HENCE,THIS SHOWS THAT PROPERTIES OF A COMPOUND ARE DIFFERENT FROM ITS ELEMENTS,WHILE A MIXTURE SHOWS THE PROPERTIES OF ITS CONSTITUENT ELEMENTS.