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ECAT Chemistry Chapter 14 Group IIIA & IVA Elements Online Test MCQs With Answers
Question # 1
In a group IIA from top to bottom as the atomic number increases, there is regular decreases in
Choose an answer
Ionic size
Atomic size
Ionization potential
None of these
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Question # 2
Which of the following is formed by the action of water on sodium peroxide?
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H
2
N
2
O
2
CO
2
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Question # 3
The oxyacids of phosphorus in which phosphorus has the lowest oxidiation state is
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Hypophosphorus acid
Orthophosphorus acid
Pyrophosphorus acid
Metaphosphorus acid
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Question # 4
Which of the following sulphates has the highest solubility in water
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BaSO
4
CaSO
4
MgSO
4
BeSO
4
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Question # 5
The metal with highest electrical resistance at room temperature is
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Pb
Te
Po
Fe
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Question # 6
Which of the following is the hardest metal among following
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Li
Na
Rb
K
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Question # 7
Alkali metals react violently with halogens to form
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Hydrides
Halides
Anyhydrides
None of these
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Question # 8
The acid which has a peroxy linkage is
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Sulphurous acid
Pyrosulphuric acid
Dithionic acid
Caro's acid
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Question # 9
Which of the following sulphates is not soluble in water
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Sodium sulphate
Potassium sulphate
Zinc sulphate
Barium sulphate
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Question # 10
Phosphorus pentoxide finds use as
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An oxidizing agent
A reducing agent
A bleaching agent
A dehydrating agent
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Question # 11
The silver bromide in hypo (Na
2
S
2
O
3) solution is
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Soluble
Not soluble
Precipitated
Not effect
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Question # 12
Which one of the following does not belong to alkaline earth metals
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Be
Ra
Ba
Rn
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Question # 13
Silicon atom is hybridized:
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sp
sp
2
sp
3
dsp
2
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Question # 14
Heavy water is obtained by
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Prolonged electrolysis of water
Dissolving heavy salt in water
Simple distillation of water
Removing impurities of calcium and magnesium form water
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Question # 15
White phosphorus is
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A mono atomic gas
P
4
, a tetrahedral solid
P
8
, a crown
A linear diatomic molecule
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Question # 16
Density of aluminium is (g cm
-3
):
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B
Al
Si
Ge
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Question # 17
The oxidation number of each element of group ll-A is
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0
+1
+2
-1
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Question # 18
Which of the following salt is used as purgative
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CaSO
4
MgSO
4
BeSO
4
NaCl
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Question # 19
Aluminium oxide is:
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Acidic oxide
Basic oxide
Amphoteric oxided
None of these
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Question # 20
Pb has inert pair of electrons:
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One
Two
Three
Four
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Question # 21
______ gives peroxide
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Li
Ba
Sr
Be
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