JEE Questions for Chemistry Class 12 P Block Elements Quiz 15 - MCQExams.com

Bleaching action of SO2 is due to
  • Reduction
  • Oxidisation(oxide)
  • Hydrolysis
  • Acidic nature
About H2SO4 which is incorrect
  • Reducing agent
  • Dehydrating agent
  • Sulphonating agent
  • Highly Viscous

Chemistry-Class 12 p Block Elements-2822.png
  • Reducing agent
  • Oxidising agent
  • Catalytic agent
  • Dehydrating agent

Chemistry-Class 12 p Block Elements-2823.png
  • Dehydrating agent
  • Oxidising agent
  • Reducing agent
  • All of these
When conc. H2SO4 comes in contact with sugar it becomes black due to
  • Hydrolysis
  • Hydration
  • Decolourisation
  • Dehydration
Which one is known as oil of vitriol
  • H2SO3
  • H2SO4
  • H2S2O7
  • H2S2O8
Ozone deplete due to the formation of following compound in Antartica
  • Acrolien
  • Peroxy Acetyl Nitrate
  • SO2 and SO3
  • Chlorine nitrate
Which one of the gas dissolves in H2SO4 to give oleum
  • SO2
  • H2S
  • S2O
  • SO3
There is no S – S bond in

  • Chemistry-Class 12 p Block Elements-2825.png
  • 2)
    Chemistry-Class 12 p Block Elements-2826.png

  • Chemistry-Class 12 p Block Elements-2827.png

  • Chemistry-Class 12 p Block Elements-2828.png
Which element is found in free state
  • I
  • S
  • Ur
  • Ag
Which of the following hydrides has the lowest boiling point
  • H2O
  • H4S
  • H2Se
  • H2Te
In the preparation of sulphuric acid, V2O5 is used is the reaction, which is

  • Chemistry-Class 12 p Block Elements-2830.png
  • 2)
    Chemistry-Class 12 p Block Elements-2831.png

  • Chemistry-Class 12 p Block Elements-2832.png

  • Chemistry-Class 12 p Block Elements-2833.png
Point out of in which of the following properties of oxygen differs from the rest of the members of its family (Group - VIA)
  • High value of ionization energy
  • Oxydation state (2,4,6)
  • Polymorphism
  • Formation of hydrides
Ozone turns trimethyl paper
  • Green
  • Violet
  • Red
  • Black
No of atoms in one molecules of sulphur is
  • 8
  • 4
  • 3
  • None of these
Bond angle is minimum for

  • Chemistry-Class 12 p Block Elements-2834.png
  • 2)
    Chemistry-Class 12 p Block Elements-2835.png

  • Chemistry-Class 12 p Block Elements-2836.png

  • Chemistry-Class 12 p Block Elements-2837.png
A solution of SO2 in water reacts with H2S precipating sulphur. Here SO2 acts as
  • Oxidising agent
  • Reducing agent
  • Acid
  • Catalyst
When SO2 is passed through cupric chloride solution
  • White precipitate is obtained
  • Solution becomes colouless
  • Solution becomes colourless & White ppt is obtained of Cu2Cl2
  • No Change
Which of the elements listed below occurs in allotropic forms
  • Iodine
  • Copper
  • Sulphur
  • Silver
Oxygen was discovered by
  • Priestly
  • Scheele
  • Boyle
  • Cavendish
Shape of O2F2 is similar to that of
  • C2F2
  • H2O2
  • H2F2
  • C2H2
Which of the following is not a chalcogen
  • O
  • S
  • Se
  • Na
Which of the following is a suboxide
  • Ba2O
  • Pb2O
  • C3O2
  • ZnO

Chemistry-Class 12 p Block Elements-2839.png
  • H2
  • N2
  • O2
  • CO
H2SO4 acts as dehydrating agent in its reaction with
  • H2C2O4
  • Ba(OH)2
  • KOH
  • Zn
A gas that can not be collected over water is
  • N2
  • O2
  • SO2
  • PH3
Oxygen is not evolved on reaction of ozone with
  • H2O2
  • SO2
  • Hg
  • KI
α and β form of sulphur both are stable at
  • 369oC
  • 369K
  • 4oC
  • 0oC

Chemistry-Class 12 p Block Elements-2840.png

  • Chemistry-Class 12 p Block Elements-2841.png
  • 2)
    Chemistry-Class 12 p Block Elements-2842.png

  • Chemistry-Class 12 p Block Elements-2843.png

  • Chemistry-Class 12 p Block Elements-2844.png
Sulphur in +3 oxidation state is present in
  • Sulphurous acid
  • Pyrosulphuric acid
  • Dithionous acid
  • Thiosulphuric acid
Which one of the following is non-reducing
  • H2S
  • H2Te
  • H2Se
  • H2O
When PbO2 reacts with conc. HNO3 the gas evolved is
  • NO2
  • O2
  • N2
  • N2O
The most efficient agent for the absorption of SO3 is
  • 80% H2SO4
  • 98% H2SO4
  • 50% H2SO4
  • 20% H2S2O7
In presence of moisture, SO2 can
  • Act as oxidant
  • Lose electron
  • Gain electron
  • Not act as reductant
The correct order of thermal stability of hydrogen halide.
  • HI > HBr > HCl > HI
  • HF > HCl > HBr > HI
  • HCI < HF < HBr < HI
  • HI > HCl > HF > HBr
Phosgene is common name of
  • Carbonyl chloride
  • Phosphine
  • Phosphorus Oxychloride
  • Phosphorus trichloried
The solubility of iodine in water increases in presence of
  • Alcohol
  • Chloroform
  • Sodium hydroxide
  • Potassium trichloride
On boiling an aqueous solution of KClO3 with iodine the following is obtained
  • KClO3
  • KClO4
  • KClO2
  • KIO3
Colour of iodine is disappeared by shaking it with aqueous solution of
  • H2SO4
  • Na2S2O3
  • Na2S
  • Na2SO4
The stability of interhalogen compound is in order

  • Chemistry-Class 12 p Block Elements-2849.png
  • 2)
    Chemistry-Class 12 p Block Elements-2850.png

  • Chemistry-Class 12 p Block Elements-2851.png

  • Chemistry-Class 12 p Block Elements-2852.png
Bromine is obtained on commercial scale from
  • Caliche
  • Carnellite
  • Common Salt
  • Cryolite
Chlorine was discovered by
  • Davy
  • Priestley
  • Ratherlford
  • Sheele
Bromine is liberated when aqueous solution of potassium bromide is treated with
  • Cl
  • I2
  • Dilute H2SO4
  • SO2
Chlorine reacts under various conditions with sodium hydroxide to give
  • Sodium Chloride
  • Sodium hypochlorite
  • Sodium chlorate
  • All of these
Br2 gas turns starch iodide paper
  • Blue
  • Red
  • Colourless
  • Yellow
Which of following is weakest acid?
  • HF
  • HCl
  • HBr
  • HI
Deacon’s process is used in manufacture of
  • Bleaching powder
  • Sulphonic acid
  • Nitric acid
  • Chlorine
Which of following is correct?
  • Iodine is solid
  • Chlorine is insoluble in water
  • Iodine is more reactive than bromine
  • Bromine is more reactive than chlorine
Sea water is employed as a source of manufacture of
  • F
  • I
  • Br
  • Cl
Which is most reactive halogen
  • Cl2
  • Br2
  • I2
  • F2
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