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Online Tests
ECAT Chemistry Chapter 14 Group IIIA & IVA Elements Online Test MCQs With Answers
Question # 1
Which of the following sulphates is not soluble in water
Choose an answer
Sodium sulphate
Potassium sulphate
Zinc sulphate
Barium sulphate
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Question # 2
The structure of white phosphorus is
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Square planar
Pyramidal
Tetrahedral
Trigonal planer
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Question # 3
Francium is an element at the bottom of Group I in the Periodic Table. Which one of the following predication is likely to be correct?
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It will react with water to liberate oxygen
Its hydroxide will be a strong alkali in water
Its carbonate will decompose on heating to give carbon dioxide
Its nitrate on heating will give nitrogen dioxide and oxygen
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Question # 4
What is going to replace the petroleum?
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Silica
Silicates
Silicones
Silicon
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Question # 5
Which of the element is not an alkaline earth metal
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Beryllium
Strontium
Barium
Caesium
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Question # 6
Sodium is never found free in nature because of its
Choose an answer
Chemical reactivity
Small ionic size
Small atomic volume
None of these
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Question # 7
The electrolytic cell used for the production of metallic sodium is known as
Choose an answer
Down's cell
Solvary's cell
Haber's cell
None of these
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Question # 8
Electron affinity of sulphur is
Choose an answer
More than O and Se
More than O but less than Se
Less than O but more than Se
Equal to O and Se
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Question # 9
Calcium carbide reacts with water to produce
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Acetylene
Methane
Ethylene
Ethane
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Question # 10
Which of the following form normal oxide
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K
Li
Na
None
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Question # 11
Boric acid cannot be used:
Choose an answer
An antiseptic in medicine
For washing eyes
In soda bottles
For enamels and glazes
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Question # 12
White P when boiled with strong solution of caustic soda produces
Choose an answer
Phosphine
Posh acid
Phosphorous acid
None
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Question # 13
Sometimes a yellow turbidity appears while passing H
2
S gas even in the absence of II group radicals. This is because
Choose an answer
Sulphur is present in the mixture as impurity
IV group radicals are precipitated as sulphides
Of the oxidation of H
2
S gas by some acid radicals
III group radicals are precipitated as hydroxides
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Question # 14
Some of the elements of a period show similar behavior with the elements of next group in next period this is called
Choose an answer
Vertical relationship
Oblique relationship
Diagonal relationship
None
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Question # 15
Which one of the following does not belong to alkaline earth metals
Choose an answer
Be
Ra
Ba
Rn
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Question # 16
Which of the following is a tetrabasic acid?
Choose an answer
ORthophosphoric acid
Hyposphosphorus acid
Metaphosphoric
Pyrophosphoric acid
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Question # 17
Alkaline earth metals posses two electrons in their outermost
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F-orbital
D-orbital
S-orbital
P-orbital
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Question # 18
Sodium forms largely
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Normal oxides
Per-oxides
Superoxides
None of these
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Question # 19
Which electronic configuration corresponds to an element of Group ||Z-A of the periodic table?
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1s, 2s
2
, 2p
6
, 3s
2
, 3p
6
, 4s
2
1s
2
, 2s
2
, 2p
6
1s
2
, 2s
2
, 2p
6
, 3s
2
, 3p
3
1s
2
, 2s
2
, 2p
6
, 3s
2
, 3p
1
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Question # 20
All the following decompose easily on heating to give oxygen except
Choose an answer
Lead nitrate
Potassium chlorate
Mercuric oxide
Manganese dioxide
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Question # 21
Sodium is manufacture by the electrolysis of fused sodium chloride and not from an aqueous solution of sodium chloride because
Choose an answer
Sodium chloride does not ionize in the water solution
Sodium chloride is not soluble in water
Sodium deposited at the cathode may react with water to form sodium hydroxide
Electricity does not pass through aqueous NaCl
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Question # 22
Hypo is used in photography for
Choose an answer
Developing picture
Picture printed
The colour of picture
The fixation of picture
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Question # 23
When a colourless gas is passed through bromine water only decolourisation takes place the gas is
Choose an answer
SO
2
HBR
HCl
H
2
S
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Question # 24
BiCl
3
on hydrolysis forms a white precipitate of
Choose an answer
Bismuthio acid
Bismuth oxychloride
Bismuth pentachloride
Bismuth hydroxide
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Question # 25
Baking powder has which one of the following formula
Choose an answer
Na
2
CO
3
Na
2
SO
4
NaHCO
3
K
2
CO
3
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Question # 26
Which of the following is acidic?
Choose an answer
SO
3
N
2
O
BeO
HgO
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Question # 27
The oxidation number of each element of group ll-A is
Choose an answer
0
+1
+2
-1
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Question # 28
The element caesium bears resemblance with
Choose an answer
Ca
Cr
Rubidium
None of the above
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Question # 29
On alkali and alkaline earth metals down the group, there is decreasing trend in
Choose an answer
m.p.
b.p.
Ionization potentiall
All of these
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Question # 30
Copper oxide is dedected by borax bead test with colour:
Choose an answer
Blue
Red
Yellow
Black
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Question # 31
When ammonia is heated with cupric oxide, a molecule of ammonia will
Choose an answer
Gain 3 electrons
Lose 3 electrons
Gain 2 electrons
Lose 2 electrons
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