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Online Tests
ECAT Chemistry Chapter 14 Group IIIA & IVA Elements Online Test MCQs With Answers
Question # 1
Marble is chemically
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CaCl
2
CaCO
3
Na
2
CO
3
NaHCO
3
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Question # 2
Which is litharge or massicot?
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PbO
Pb
2
O
Pb
3
O
4
PbO
2
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Question # 3
The oxidation number of each element of group l-A is
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0
+1
+2
-1
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Question # 4
Which oxide of nitrogen is obtained on heating ammonium nitrate at 250
° C?
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Nitric oxide
Nitrous oxide
Nitrogen dioxide
Dinitrogen tetraoxide
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Question # 5
Permonosulphuric acid is known as
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Marshall's acid
Carlo's acid
Sulphuric acid
None of these
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Question # 6
HNO
2
acts as an/a
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Acid
Oxidizing agent
Reducing agent
All the three
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Question # 7
Which is used to remove air bubbles form metals?
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B
Be
Mg
Al
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Question # 8
When SO
2
is passed through acidified K
2
Cr
2
O
7
solution
Choose an answer
The solution turns blue
The solution is decolourised
SO
2
is reduced
Green Cr
2
(SO
4
)
3
is formed
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Question # 9
NaHCO
3
is commonly called
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Soda ash
Baking soda
Washing soda
None of these
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Question # 10
Borax is a common mineral of alkali metal sodium. Its formula is
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Na
2
B
4
O
7
Na
2
,B
4
O
7
. 10H
2
O
Na
2
B
3
O
6
. 10H
2
O
Na
2
B
4
O
7
- 5H
2
O
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Question # 11
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 # 12
Potassium superoxide has a use in breathing equipment in space crafts. The balanced equation for the reaction is
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Question # 13
The alkali metals form
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Ionic bond
Covalent bond
Co-ordinate bond
H-bond
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Question # 14
Which of the following statement is not related to Solvay's process of Na
2
CO
3
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Cheap materials
Pure product
Continuous process
Harmful by-products
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Question # 15
In a group IIA from top to bottom as the atomic number increases, there is regular decreases in
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Ionic size
Atomic size
Ionization potential
None of these
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Question # 16
Which has soapy touch?
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Na2B4O7
H3BO3
Ca2B6O11
HBO2
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Question # 17
As a fixing agent in photography, sodium thisoulphate is used for
Choose an answer
Dissolving out unreacted silver bromide
Converting silver
Reducing solubility of AgBr
Preventing overdeveloping and fogging
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Question # 18
Some of the elements of a period show similar behavior with the elements of next group in next period this is called
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Vertical relationship
Oblique relationship
Diagonal relationship
None
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Question # 19
NaHCO
3
is prepared by
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Down's process
Solvay's process
Nelson's process
None of these
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Question # 20
Silicon atom is hybridized:
Choose an answer
sp
sp
2
sp
3
dsp
2
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Question # 21
Heavy water is obtained by
Choose an answer
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 # 22
Which of the following elements is most metallic?
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P
As
Sb
Bi
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Question # 23
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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Question # 24
Lime, calcium oxide, is used in agriculture for
Choose an answer
Adding ca metal in soil
Making soil acidic
Neutralizing acidic soil
Adding oxygen to soil
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Question # 25
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 # 26
Which is an essential constituent of chlorophyll
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Be
Fe
Mg
Ca
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Question # 27
Which of the following is the hardest metal among following
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Li
Na
Rb
K
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Question # 28
Sometimes a yellow turbidity appears while passing H
2
S gas even in the absence of II group radicals. This is because
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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 # 29
Sodium forms largely
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Normal oxides
Per-oxides
Superoxides
None of these
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Question # 30
The chemical formula of Epson salt is
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MgSO
4
MgCl
2
MgSO
4
. 7H
2
O
MgCl
2
. 7H
2
O
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Question # 31
When sulphur is boiled with Na
2
SO
3
solution, the compound formed is
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Sodium sulphides
Sodiums sulphates
Sodium persulphate
Sodium thiosulphate
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