Question

class 7th
chapter name- physical and chemical change
1. Write the formulae for:-

a) Magnesium oxide
b) Iron oxide
c) Lime water
d) calcium carbonate
e) Carbon dioxide​

Answer 1

Answer:

Chemical formula of the following is as follows:

(a) Magnesium chloride = MMgCl2

(b) Iron oxide = Fe2O3

(c) Lime water= Ca(OH)2

(d)Calcium carbonate = CaCO3

(e)Carbon dioxide= CO2

Answer 2

Answer:

a. MgO

b. Feo

c. Ca(OH)2

d CaCO3

e. CO2