Question 1.
What happens when (Also state your observations).
i) We add little amount of Aluminium in fused Caustic Soda / Caustic Potash solution.
ii) Addition of ethyl alcohol to acetic acid in the presence of concentrated Sulphuric Acid.
iii) Action of Sodium hydroxide solution on Iron (II) sulphate solution.
iv) Aluminium hydroxide is heated.
Question 2.
Draw an electron dot diagram to show the formation of each of the following compounds.
a) Methane b) Magnesium chloride
c) Hydronium ion
Question 3.
Give the compositions of the following alloys.
a) Solder
b) Magnalium
c) Duralumin
d) Bronze
Question 4.
Give 1 example for each.
a) Mineral Acid
b) Hydracid
c) Liquid Covalent Compound
d) Solid Ionic Compound
e) Acid Salt
f) Roasting
g) Calcination
h) Alkane
i) Alkene
j) Alkyne
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ANSWER...
f) and g)
Calcium carbonate is converted into calcium oxide by calcination. ... For example: Zinc sulphide is converted into zinc oxide by roasting. The difference between roasting and calcination is that roasting is done in excess of air while calcination is done in limited supply or absence of air.
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