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Free download in PDF General Knowledge Questions with Answers on Class 12 Chemistry Chapter 7 p Block Elements for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries./p>
(1)
Bond angle is minimum for
[A]
H2O
[B]
H2S
[C]
H2Se
[D]
H2Te
(2)
A solution of SO2 in water reacts with H2S precipating sulphur. Here SO2 acts as
[A]
Oxidising agent
[B]
Reducing agent
[C]
Acid
[D]
Catalyst
(3)
Whe SO2 is passed through cupric chloride solution
[A]
White precipitate is obtained
[B]
Solution becomes colouless
[C]
Solution becomes colourless & White ppt is obtained of Cu2Cl2
[D]
No Change
Answer: Solution becomes colourless & White ppt is obtained of Cu2Cl2
(4)
Which of the following is acidic
[A]
SO3
[B]
N2O
[C]
BeO
[D]
HgO
(5)
Which of the elements listed below occurs in allotropic forms
[A]
Iodine
[B]
Copper
[C]
Sulphur
[D]
Silver
(6)
Oxygen was discovered by
[A]
Priestly
[B]
Scheele
[C]
Boyle
[D]
Cavendish
(7)
Shape of O2F2 is similar to that of
[A]
C2F2
[B]
H2O2
[C]
H2F2
[D]
C2H2
(8)
Which of the following is not a chalcogen
[A]
O
[B]
S
[C]
Se
[D]
Na
(9)
Which of the following is a suboxide
[A]
Ba2O
[B]
Pb2O
[C]
C3O2
[D]
ZnO
(10)
KO2 + CO2 → ? (gas)
[A]
H2
[B]
N2
[C]
O2
[D]
CO
(11)
H2SO4 acts as dehydrating agent in its reaction with
[A]
H2C2O4
[B]
Ba(OH)2
[C]
KOH
[D]
Zn
(12)
A gas that can not be collected over water is
[A]
N2
[B]
O2
[C]
SO2
[D]
PH3
(13)
The molecular formula of dithionic acid is
[A]
H2S2O4
[B]
H2S2O6
[C]
H2S2O5
[D]
H2S2O7
(14)
Oxygen is not evolved on reaction of ozone with
[A]
H2O2
[B]
SO2
[C]
Hg
[D]
KI
(15)
α and β form of sulphur both are stable at
[A]
369oC
[B]
369K
[C]
4oC
[D]
0oC
(16)
SO2 + H2S → X The final product is
[A]
H2O + S
[B]
H2SO4
[C]
H2SO3
[D]
H2S2O3
(17)
Sulphur in +3 oxidation state is present in
[A]
Sulphurous acid
[B]
Pyrosulphuric acid
[C]
Dithionous acid
[D]
Thiosulphuric acid
(18)
H2S is not a/an
[A]
Reducing agent
[B]
Acidic
[C]
Oxidising agent
[D]
None
(19)
Which one of the following is non-reducing
[A]
H2Se
[B]
H2Te
[C]
H2S
[D]
H2O
(20)
When PbO2 reacts with conc. HNO3 the gas evolved is
[A]
NO2
[B]
O2
[C]
N2
[D]
N2O
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