CBSE Class 12 The p Block Elements Multiple Choice Questions with Answers. MCQ Questions Class 12 The p Block Elements with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 The p Block Elements MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 The p Block Elements with Answers - Set - 3
Question 1:
Helium-oxygen mixture is used by deep sea divers in preference to nitrogen-oxygen mixture because
(a) helium is much less soluble in blood than nitrogen
(b) nitrogen is much less soluble in blood than helium
(c) due to high pressure deep under the sea nitrogen and oxygen react to give poisonous nitric oxide
(d) nitrogen is highly soluble in water
Correct Answer – (A)
Question 2 :
The structure of XeF6 is experimentally determined to be distorted octahedron. Its structure according to VSEPR theory is
(a) octahedron
(b) trigonal bi pyramid
(c) pentagonal bi pyramid
(d) tetragonal bipyramid
Correct Answer – (C)
Question 3 :
Which of the following pair have identical shape ?
(a) CH4 , SF4
(b) BCI3 , ClF3
(c) XeF2, ZnCl2
(d) SO2 , CO2
Correct Answer – (C)
Question 4 :
In Ramsay and Rayleigh’s isolation of noble gases from air, the nitrogen of the air is finally converted into
(a) NaNO2 only
(b) NO and NO2
(c) NaNO3 only
(d) NaNO2 and NaNO3
Correct Answer – (D)
Question 5 :
Which of the following is most volatile ?
(a) HF
(b) HCI
(c) HBr
(d) HI
Correct Answer – (D)
MCQ Questions Class 12 The p Block Elements with Answers
Question 6:
Platinum, palladium and iridium are called noble metals because
(a) Alfred Nobel discovered them
(b) they are found in native state
(c) they are shining lustrous and pleasing to look at
(d) they are inert towards many common reagents
Correct Answer – (D)
Question 7:
The correct order of pseudohalide, polyhalide and interhalogen are
(a) BrI–2 , OCN– , IF–5
(b) IF5 , BrI–2 , OCN–
(c) OCN– , IF5 , BrI–2
(d) OCN- , BrI–2, IF5
Correct Answer – (D)
Question 8:
Molecules of a noble gas do not posses vibrational energy because a noble gas
(a) is monoatomic
(b) is chemically inert
(c) has completely filled shells
(d) is diamagnetic
Correct Answer – (A)
Question 9:
Which one of the following is used for the separation of noble gas mixture from air ?
(a) Charcoal
(b) 90% CaC2 + 10% CaCl2
(c) Soda lime + potash solution
(d) 90% CaCO3 + 10% urea
Correct Answer – (B)
Question 10:
Aqua-regia is
(a) 1 : 3 cone. HNO3 and cone. HCl
(b) 1 : 2 cone. HNO3 and cone. HCl
(c) 3 : 1 conc. HNO3 and cone. HCl
(d) 2 : 1 cone. HNO3 and cone. HCl
Correct Answer – (A)
- NCERT Solutions Class 11 Chemistry Chapter 1 : Some Basic Concepts of Chemistry
- NCERT Solutions Class 11 Chemistry Chapter 2 : Structure Of The Atom
- NCERT Solutions Class 11 Chemistry Chapter 3 : Classification of Elements and Periodicity in Properties
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- NCERT Solutions Class 11 Chemistry Chapter 6 : Thermodynamics
- NCERT Solutions Class 11 Chemistry Chapter 7 : Equilibrium
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