Question

a little su po
Fig. 6.10 Preparation UPP
Observation Deep blue coloured crystals of copper sulphate are obtained, .
called che
Rusting of
occurs in
Interactio
Assess Yourself 2
necessary
shape and Cole
and
1. Fill in the blanks.
(a) Different substances give crystals of different
(b) The salinity of sea water is due to dissolved
(c) The iron reacts very readily with oxygen in the presence of
(d) The general formula for rust is FE 20 3
NCERTE
1 Class
2. Give two methods that how you can prevent rusting.
3. What is the chemical reaction that takes place during rusting?
(a)
(c)
(e)
SCI-WORDS
ns.
Desalination It is a process that takes away mineral components from saline water
(a)
(c)
Rust It is
ish-brown substance that forms
the
le​

Answer 1

Answer:

ExplanatioCopper sulphate crystals are blue in colour due to the presence of water of crystallization. The colour in only there because of the presence of water of crystallization.

When they are heated strongly anhydrous copper sulphate is formed that is white in colour(colorless). This is so because of removal of water of crystallization.

The reaction is given by,

CuSO  

4

​  

.5H  

2

​  

0(blue)→CuSO  

4

​  

(white)+5H  

2

​  

On: