Chemistry Language Of Chemistry Exercise 1a
Please Select
1 What is a symbol? What information does it convey?
Solution :
2 Why is the symbol S for Sulphur, but Na for Sodium and Si for Silicon?
Solution :
3 Write the full form of IUPAC. Name the elements represented by the following Symbols: Au, Pb, Sn, Hg
Solution :
4 If the symbol for cobalt, Co was written as CO. What would be wrong with it?
Solution :
5 What do the following symbols stand for? a) H b) H2 c) 2H d) 2H2
Solution :
6 What is meant by atomicity? Name a diatomic element.
Solution :
7 a) Explain the terms valency and variable valency.
b) How are the elements with variable valency named? Explain with an example.
Solution :
8 Give the formula and valency of
a) aluminate
b) chromate
c) aluminium
d) cupric
Solution :
9 a) What is a chemical formula?
b) What is the significance of a formula? Give an illustrate.
Solution :
10 What do you understand by following terms?
a) Acid radical b) Basic radical
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11 Select the basic radical in the following compounds a) MgSO4
b) (NH)2
c) Al2(SO4)3
d) ZnCO3
e) Mg(OH)2
Solution :
12 Write the chemical formulae of sulphates of Aluminium, Ammonium and Zinc.
Solution :
13 The valency of element A is 3 and that of element B is 2. Write the formula of the compound formed by the combination of A and B.
Solution :
14 Match the following
Compound Formula Boric acid NaoH Phosphoric acid SiO2 Nitrous acid Na2CO3 Nitric acid KOH Sulphorous acid CaCO3 Sulphuric acid NaHCO3 Hydrochloric acid H2S Silica (Sand) H2O Caustic soda (Sodium Hydroxide) PH3 Caustic potash (Potassium hydroxide) CH4 Washing soda (Sodium carbonate) NH3 Baking Soda (Sodium bi carbonate) HCl Lime stone (Calcium carbonate) H2SO3 Water HNO3 Hydrogen Sulphide HNO2 Ammonia H3BO3 Phosphine H3PO4 Methane H2SO4
| Compound | Formula |
|---|---|
| Boric acid | NaoH |
| Phosphoric acid | SiO2 |
| Nitrous acid | Na2CO3 |
| Nitric acid | KOH |
| Sulphorous acid | CaCO3 |
| Sulphuric acid | NaHCO3 |
| Hydrochloric acid | H2S |
| Silica (Sand) | H2O |
| Caustic soda (Sodium Hydroxide) | PH3 |
| Caustic potash (Potassium hydroxide) | CH4 |
| Washing soda (Sodium carbonate) | NH3 |
| Baking Soda (Sodium bi carbonate) | HCl |
| Lime stone (Calcium carbonate) | H2SO3 |
| Water | HNO3 |
| Hydrogen Sulphide | HNO2 |
| Ammonia | H3BO3 |
| Phosphine | H3PO4 |
| Methane | H2SO4 |
Solution :
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15 Write the basic and acidic radicals of the following and then write the chemical formulae of these compounds.
a) Barium sulphate
b) Bismuth nitrate
c) calcium bromide
d) Ferrous sulphide
e) Chromium sulphate
f) Calcium silicate
g) Stannic oxide
h) Sodium Zincate
i) Magnesium phosphate
j) Sodium thiosulphate
k) Stannic phosphate
l) Nickel-bi-silphate
m) Potassium mangnate
n) Potassium ferrocynide
Solution :
16 Write chemical names of the following compounds:
a) Ca3(PO4)2
b) K2CO3
c) K2MnO4
d) Mn3(BO3)2
e) Mg(HCO3)2
f) Na4Fe(CN)6
g) Ba(Cl3)2
h) Ag2SO3
i) (CH3COO)2Pb
j) Na2SiO3
Solution :
17 Give the names of the following compounds
a) KClO
b) KClO2
c) KClO3
d) KClO4
Solution :
18 Complete the following statements by selecting the correct option.
a) The formula of a compound represents
i) an atom
ii) a particle
iii) a molecule
iv) a combination
b) The correct formula of aluminium oxide is
i) AlO3
ii) AlO2
iii) Al2O3
iv) Al3O2
c) The valency of Nitrogen in Nitrogen dioxide (NO2) is
i) One
ii) Two
iii) Three
iv) Four
Solution :
19 Give the names of the elements and number of atoms of those elements, present in the following compounds.
a) Sodium sulphate
b) Quick lime
c) Baking soda (NaHCO3)
d) Ammonia
e) Ammonium dichromate
Solution :
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20 The formula of the sulphate of an element M is M2(SO4)3. Write the formula of it.
a) Chloride
b) Oxide
c) Phosphate
d) Acetate
Solution :
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