Lecture 3 : Revision

Define Sonorisity?

What is Physical state of elements?

Write Reaction with water?

Physical propeties of metal

what is Reducing nature of metals?

define Malleability of metals.

What is Ductility of metals.

Heat conductivity.

Define lustre of metals with example.

 Describe Hardness.

Define Lustre.

What is Electrical conductivity in metals ? 

Fill in the blanks to complete the following paragraph.
The name of the product formed in the reaction of sulphur and
_____________ is sulphur dioxide gas. When sulphur dioxide is
dissolved in_________________, sulphurous acid is formed. The
sulphurous acid turns _____________ litmus paper to ____________.
Generally oxides of __________ are acidic in nature.
After completing the paragraph write two questions which you
can raise on the basis of this information.

Iron is more reactive than copper. Can you write an activity to
show this?

Some of the following statements are incorrect. Find the incorrect
statements and correct them.
(a) The property of metals by virtue of which they can be drawn
into wires is called ductility.
(b) Metals are good conductor of electricity but poor conductor
of heat.
(c) Articles made of metals produce ringing sound when struck
hard.
(d) Oxides of non-metals and metals are acidic in nature.
(e) A less reactive metal replaces a more reactive metal from its
salt solution in water.

A doctor prescribed a tablet to a patient suffering from iron
deficiency. The tablet does not look like iron. Explain.

Paheli prepared a blue coloured solution of copper sulphate in
beaker A and placed an iron nail in it. Boojho prepared a yellowish
green solution of ferrous sulphate in beaker B and placed a copper
wire in it. What changes will they observe in the two beakers
after an hour?