12th Class Chemistry The p-Block Elements-I / p-ब्लॉक के कुछ तत्व-I Question Bank

done Assertion And Reason (MCQs) - The p-Block Elements Total Questions - 15

• question_answer1)

  Directions: (Q. 1 to 15)

  For question numbers 1-15, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

  Assertion: Compared to other noble gases, Xe is chemically reactive.

  Reason: Xe has low ionisation potential value.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer2)

  Assertion: Both rhombic and monoclinic sulphur exist as \[{{S}_{8}}\] but oxygen exists as \[{{O}_{2}}\].

  Reason: Oxygen forms \[p\pi -p\pi \]multiple bond due to small size and small bond length but \[p\pi -p\pi \] bonding is not possible in sulphur.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer3)

  Assertion: Nitrogen has higher ionization energy than that of oxygen.

  Reason: Nitrogen has smaller atomic size than that of oxygen.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer4)

  Assertion: Most of known noble gas compounds are those of xenon.

  Reason: The ionization enthalpy of xenon is very close to that of oxygen.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer5)

  Assertion: Among the hydrides of nitrogen family, \[Bi{{H}_{3}}\] has the highest boiling point.

  Reason: The boiling point increases down the group because of increase in size.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer6)

  Assertion: Noble gases are least reactive.

  Reason: Noble gases have completely filled s- and p-orbital and attain stable electronic configuration.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer7)

  Assertion: Caro's acid has S atom in +6 oxidation state.

  Reason: Caro's acid contains one peroxo \[O_{2}^{2-}\] group.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer8)

  Assertion: Halogens are coloured.

  Reason: Halogen molecules absorb some wavelength of visible light and the electrons are promoted to higher energy molecular orbitals.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer9)

  Assertion: \[NO_{3}^{-}\] is planar while \[N{{H}_{3}}\] is pyramidal.

  Reason: N in \[NO_{3}^{-}\]is \[s{{p}^{2}}\]hybridized but in \[N{{H}_{3}}\] it is \[s{{p}^{3}}\] hybridized.

   
  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer10)

  Assertion: Among nitrogen halides \[N{{X}_{3}}\] the dipole moment is highest for \[N{{I}_{3}}\] and lowest for \[N{{F}_{3}}\].

  Reason: Nitrogen halides \[N{{X}_{3}}\], have trigonal pyramidal structure.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer11)

  Assertion: \[C{{l}_{2}}\] gas bleaches the articles permanently.

  Reason: \[C{{l}_{2}}\] is a strong reducing agent.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer12)

  Assertion: Xenon forms fluorides.

  Reason: Because 5d-orbitals are available for valence expansion.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer13)

  Assertion: Sulphuric acid is more viscous than water.

  Reason: Concentrated sulphuric acid has a great affinity for water.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer14)

  Assertion: Nitrogen is unreactive at room temperature but becomes reactive at elevated temperatures or in presence of a catalyst.

  Reason: In nitrogen molecule, there is extensive delocalization of electrons.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer15)

  Assertion: All of the noble gases compounds are known except helium and neon.

  Reason: Ionisation potential values of helium and neon are close to xenon.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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