p-Block Elements MCQs | Question – Paper 5

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Topic: p-Block Elements, Test No.: 05, Total MCQs: 10

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Question 1
The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorous acid is [AIEEE 2005]
A
zero
B
two
C
one
D
three
Question 2
Which of the following is not oxidized by O3? [IIT-JEE 2005]
A
KI
B
FeSO4
C
KMnO4
D
K2MnO4
Question 3
Which of the following has – O – O – linkage [IIT-JEE 2004]
A
H2S2O6
B
H2S2O8
C
H2S2O3
D
H2S4O6
Question 4
Extra pure N2 can be obtained by heating [IIT-JEE 2011]
A
NH3 with CuO
B
NH4NO3
C
(NH4)2Cr2O7
D
Ba(N3)2
Question 5
An element belongs to Group 15 and third period of the periodic table. Its electronic configuration will be [WB-JEE 2011]
A
1s22s22p3
B
1s22s22p4
C
1s22s22p63s23p3
D
1s22s22p63s23p2
Question 6
Which of the following is used to prepare Cl2 gas at room temperature from concentrated HCl? [West Bengal JEE 2011]
A
MnO2
B
H2S
C
KMnO4
D
Cr2O3
Question 7
Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O? [NEET 2013]
A
Ca < Al < C < O < F
B
Al < Ca < O < C < F
C
Al < O < C < Ca < F
D
C < F < O < Al < Ca
Question 8
Which statement is wrong? [NEET 2013]
A
Feldspars are not aluminosilicates
B
Beryl is an example of cyclic silicate
C
Mg2SiO4 is orthosilicate
D
Basic structural unit in silicates is the SiO4 tetrahedron
Question 9
When conc. H2SO4 is heated with P2O5 , the acid is converted into [Karnataka CET 2007]
A
sulphur
B
sulphur dioxide
C
sulphur trioxide
D
a mixture of sulphur dioxide and sulphur trioxide
Question 10
In froth floatation process for the purification of ores, the particles of ore float because [Karnataka CET 2004]
A
They are insoluble
B
They bear electrostatic charge
C
Their surface is not easily wetted by water
D
They are light
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