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Free download in PDF Objective Type 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)
Concentrated H2SO4 can not be used to prepare HBr from NaBr because it
[A]
reduces HBr
[B]
Oxidises HBr
[C]
Reacts slowly
[D]
None of above
(2)
When Fluoride is heated with conc. H2SO4 & MnO2 the gas evolved is
[A]
F2
[B]
SF
[C]
HF
[D]
None
(3)
Unlike other halogens Fluorine does not show higher oxidation states because
[A]
It is highly electionegative
[B]
It has no d - orbital
[C]
Atomic radius is very small
[D]
None of Above
Answer: It has no d - orbital
(4)
Which of following molecule is theoratically not possible
[A]
OF4
[B]
OF2
[C]
SF4
[D]
O2F2
(5)
Which one of halogen acids is liquid ?
[A]
HF
[B]
HCl
[C]
HBr
[D]
HI
(6)
When Cl2 is passed through hot & Conc. Solution of KOH following compound is formed.
[A]
KCl
[B]
KClO3
[C]
KClO2
[D]
KClO4
(7)
Chlorine can remove
[A]
Br from NaBr Sol.
[B]
F from NaF Sol.
[C]
Cl from NaCl Sol.
[D]
F from CaF2 Sol.
Answer: Br from NaBr Sol.
(8)
Which one of following acid is weakest?
[A]
HClO
[B]
HBr
[C]
HClO3
[D]
HCl
(9)
Which of following will displace halogen from solution of halide?
[A]
Br2 added to NaCl
[B]
Cl2 added to KCl
[C]
KCl added to NaF
[D]
Br2 added to KI
(10)
Chlorine can be manufactured from
[A]
Electrolysis of NaCl
[B]
Electrolysis of brine
[C]
Electrolysis of bleaching powder
[D]
All above
Answer: Electrolysis of brine
(11)
Nitric acid converts iodine to
[A]
Iodic acid
[B]
Hydro iodic acid
[C]
Iodine Nitrate
[D]
Iodine pentoxide
(12)
In preparation of chlorine from HCl, MnO2 acts as
[A]
Oxidising agent
[B]
Reducing agent
[C]
Catalytic agent
[D]
Dehydration agent
(13)
Which one is anhydride of HClO4
[A]
Cl2O
[B]
ClO2
[C]
Cl2O6
[D]
Cl2O7
(14)
In dark, which of following reacts with Hydrogen?
[A]
Br2
[B]
F2
[C]
I2
[D]
Cl2
(15)
Electrolysis of a liquid resulted in formation of Hydrogen at cathode & Cl2 at anode. Liquid is
[A]
Pure water
[B]
H2SO4 Solution
[C]
NaCl Solution
[D]
CaCl2 Solution
(16)
Concentrated HNO3 reacts with I2 to give
[A]
HI
[B]
HOI
[C]
HOIO2
[D]
HOIO3
(17)
Manufacture of Bromine from sea water, the mother liquor containing bromides is treated with
[A]
CO2
[B]
CI2
[C]
I2
[D]
SO2
(18)
Formula of some fluorides are given. Which of them will combine with fluorine?
[A]
IF5
[B]
NaF
[C]
CaF2
[D]
SF5
(19)
Which of following oxidizes H2O to oxygen.
[A]
Cl
[B]
F
[C]
Br
[D]
I
(20)
A solution of HCl in water is good conductor while gaseous Hydrogen chloride is not .
This is because
[A]
Water is good conductor of electricity
[B]
HCl in water ionises
[C]
Gas can not conduct electricity but water can
[D]
None of these
Answer: HCl in water ionises
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