12th Class Chemistry The Solid State / ठोस प्रावस्था Question Bank

done Assertion And Reason (MCQs) - The Solid State Total Questions - 15

• question_answer1)

  Directions : (1-15)

  A statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

  Assertion: The number of tetrahedral voids is double the number of octahedral voids.

  Reason: The size of the tetrahedral voids is half of that of the octahedral void.

  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: The packing efficiency is maximum for fcc structure.

  Reason: The coordination number is 8 in fcc 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_answer3)

  Assertion: Crystalline solids are anisotropic.

  Reason: Crystalline solids are not as closely packed as amorphous solids.

  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: The total number of atoms present in simple cubic unit cell in one.

  Reason: Simple cubic unit cell has atoms at its corners, each of which is shared between four adjacent unit cells.

  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: Certain compounds have both Schottky and Frenkel defects.

  Reason: Both Schottky and Frenkel defects change the density of the solids.

  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: FeO is non-stoichiometric with \[F{{e}_{0.950}}O.\]

  Reason: Some \[F{{e}^{2+}}\] ions are replaced by \[F{{e}^{3+}}\] as \[3F{{e}^{2+}}=2F{{e}^{3+}}\] to maintain electrical neutrality.

  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: In NaCl crystal, each \[N{{a}^{+}}\] ion is touching six \[C{{l}^{-}}\] ions but these \[C{{l}^{-}}\] ions do not touch each other.

  Reason: The radius ratio \[{{r}_{N{{a}^{+}}}}/{{r}_{C{{l}^{-}}}}\] is greater than 0.414 required for exact fitting.

  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: Ionic solids are made up of cations and anions.

  Reason: Ionic solids conduct electricity in solid state.

  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: In any ionic solid with Schottky defect, the number of positive and negative ions is same.

  Reason: Equal number of cationic and anionic vacancies are present.

  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: Network solids are also called giant molecules.

  Reason: Graphite is soft in nature and conducts electricity.

  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: In close packing of spheres, a tetrahedral void is surrounded by four spheres whereas an octahedral void is surrounded by six spheres.

  Reason: A tetrahedral void has a tetrahedral shape whereas an octahedral void has an octahedral shape.

  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: Anionic vacancies in alkali halides are produced by heating the alkali halide crystals with alkali metal vapour.

  Reason: Electrons trapped in anionic vacancies are referred to as F-centres.

  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: In ZnO, the excess \[Z{{n}^{2+}}\]ions are present in interstitial sites.

  Reason: Metal excess crystals have either missing cation or anion in interstitial site.

  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: bee and hcp has same packing efficiency.

  Reason: bcc arrangement has 2 atoms per unit cell while fcc has 4 atoms per unit cell.

  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: In CsCl crystal, \[C{{s}^{+}}\] ions adopt bcc arrangement.

  Reason: For N atoms adopting bcc arrangement, there are 2N tetrahedral voids.

  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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