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ECAT Chemistry Chapter 14 Group IIIA & IVA Elements Online Test MCQs With Answers
Question # 1
The oxyacids of phosphorus in which phosphorus has the lowest oxidiation state is
Choose an answer
Hypophosphorus acid
Orthophosphorus acid
Pyrophosphorus acid
Metaphosphorus acid
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Question # 2
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 # 3
Oleum is
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Castor oil
Oil of vitriol
Fuming of H
2
SO
4
None of them
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Question # 4
Dipole moment of CO molecule is:
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0.0
1.112 D
0.112 D
2.112 D
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Question # 5
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 # 6
The alkali metals form
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Ionic bond
Covalent bond
Co-ordinate bond
H-bond
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Question # 7
When a colourless gas is passed through bromine water only decolourisation takes place the gas is
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SO
2
HBR
HCl
H
2
S
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Question # 8
Bond angle is minimum for
Choose an answer
H
2
O
H
2
S
H
2
Se
H
2
Te
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Question # 9
The chemical formula of gypsum is
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CaSO
4
. 5H
2
O
CaSO
4
. 4H
2
O
CaSO
4
. 2H
2
O
None of these
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Question # 10
______ gives peroxide
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Li
Ba
Sr
Be
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Question # 11
Down's cell is used to prepare
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Sodium carbonate
Sodium bicarbonate
Sodium metal
Sodium hydroxide
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Question # 12
The oxidation number of each element of group ll-A is
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0
+1
+2
-1
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Question # 13
Which of the following element is most reactive
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Li
Na
K
Cs
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Question # 14
Which of all following compound is not possible
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Question # 15
Which of the element is not alkali metal
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Lithium
Rubidium
Francium
Magnesium
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Question # 16
Gypsum is a common mineral of
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Magnesium
Strontium
Calcium
Barium
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Question # 17
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 # 18
Identify the incorrect statement with respect to ozone
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Ozone is formed in the upper atmosphere by a photochemical reaction involving dioxygen
Ozone is more reactive than diaoxygen
Ozone is diamagnetic whereas dioxygen is paramagnetic
Ozone protects the earth's inhabitants by absorbing gamma-radiations
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Question # 19
Chile saltpetre has the chemical formula
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NaNO
3
KNO
3
Na
2
B
4
O
7
Na
2
CO
3
H
2
O
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Question # 20
Potassium superoxide has a use in breathing equipment in space crafts. The balanced equation for the reaction is
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Question # 21
Phosphine is not obtained by the reaction when
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White P is heated with NaOH
Red P is heated with NaOH
Ca
2
P
2
reacts with water
PH
4
l is boiled with water
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