Page 3 - Home Assignment 3.Practical Worksheet

(d) After some time carbon disulphide, sulphur and iron filings form three
separate layers in the test tube.

5. A mixture can be characterized by :
(a) No fixed composition of the components. (b) Homogeneity.
(c) No occurrence of chemical reaction. (d) Heterogeneous
6. A mixture of iron filings and sulphur is heated gently in a hard glass test tube. The
observation would be :
(a) sulphur will start melting first (b) iron will start melting first
(c) sulphur will sublime (d) both will melt at the same
time
7. A mixture of iron filing and sulphur is heated in a hard glass test tube. What is not
observed during reaction is :
(a) the sulphur melts and forms a pale yellow liquid
(b) the molten sulphur darkens and thickens
(c) the mixture gets red hot
(d) the substance formed at the end of reaction is of brown colour.
8. ‘X’ is a mixture of iron filings and sulphur powder ‘Y’ is a product obtained by heating
the mixture X and crushing it to fine powder. On bringing a magnet over both X and Y.
Rahul observed that :
(a) X and Y both are attracted (b) Y is attracted
but X is not
(c) X is attracted but Y is not (d) both X and Y
are not attracted

SIS/PRACTICAL WORK SHEET/ELEMENT,COMPOUNDS,MIXTURE[Type text] Page 3/2