Which of the following is not a property of trioxonitrate (V) salts?
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(D)
Production of effervescence with saturated Na2CO3 solution
4
Which of the following methods is suitable for the preparation of an insoluble salt?
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(B)
Double decomposition
5
What is the function of sulphur (IV) oxide in the reaction represented by the following equation? SO 2(aq) + 2H2S(g) → 3S (s) + 2H 2O (l)
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(B)
Oxidising agent
6
Which of the following will produce oxygen and hydrogen during its electrolysis using platinum electrode?
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(C)
Dilute sodium chloride solution
7
What mass of copper would be deposited by a current of 1. 0 ampere passing for 965 seconds through copper (ll) tetraoxosulphate (IV) solution? [Cu = 63.5; 1F = 96500C]
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(A)
0.318g
8
How many electrons are removed from Cr2- when it is oxidized to CrO42-?
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(D)
8
9
Substances which absorb water from the atmosphere without dissolving in it are sid to be
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(B)
hygroscopic
10
Pipe-borne water is usually chlorinated in order to
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(D)
kill harmful bacteria in the water
11
Which of the following can be added to dissolve the precipitate formed in the reaction represented by the following equation? CaCl2(aq) + H2C2O 4(s) ⇌ CaC 2O2
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(E)
Aqueous ammonia
12
The spontaneity of a chemical reaction is determined by the change in the
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(C)
free energy of the system
13
Two metallic ions commonly present in hard water are
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(C)
Mg2+ and Ca2+
14
Rusting of iron is an example of
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(D)
redox reaction
15
Aluminium is extracted from
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(C)
bauxite
16
Metals are said to be malleable because they
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(C)
can be beaten into sheets
17
A device used in the laboratory for intermittent production of gases without heating is
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(E)
Kipp's apparatus
18
Which of the following can undergo both addition reactions and substitution reactions?
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(A)
Benzene
19
The liquid product of the destructive distillation of coal is
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(C)
ammoniacal liquor
20
Which of the following alkanes has the highest boiling point?
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(E)
hexane
21
Petrol consists mainly of
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(C)
hydrocarbons
22
Dehydration of ethanol produces
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(C)
ethene
23
When alkanols react with sodium, the ga evolved is
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(A)
hydrogen
24
The products of the reaction between CH3CH 2COOH and CH3OH are H 2
O and
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(A)
CH 3CH2COOCH3
25
A positive reaction to Fehling's test indicates the presence of
