Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Chemical Bonding and Molecular Structure question

2023 · 25 Jan · Shift 2 · Q9
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /JEE Main
  3. /Chemistry
  4. /Chemical Bonding and Molecular Structure
  5. /2023 · 25 Jan · Shift 2 · Q9

Chemical Bonding and Molecular Structure question

2023 · 25 Jan · Shift 2 · Q9

JEE MainChemistryChemical Bonding and Molecular StructureMCQ+4 / −1
Statement I : Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the negative centre and head pointing towards the positive centre. Statement II : The crossed arrow of the dipole moment symbolizes the direction of the shift of charges in the molecules. In the light of the above statements, choose the most appropriate answer from the options given below :
  1. A
    Statement I is correct but Statement II is incorrect
  2. B
    Statement I is incorrect but Statement II is correct
  3. C
    Both Statement I and Statement II are correct
  4. D
    Both Statement I and Statement II are incorrect
View written solutionFree

Correct answer: B

  1. Recall the convention for dipole moment

    Dipole moment is indeed a vector quantity.

    In chemistry, the dipole moment is usually shown by a crossed arrow:

    • the cross/tailed end is placed near the positive end,
    • the arrow head points toward the negative end.

    This indicates the direction of electron displacement.

  2. Check Statement I

    Statement I says:

    Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the negative centre and head pointing towards the positive centre.

    The first part is correct: dipole moment is a vector quantity.

    But the direction mentioned is wrong. By convention, the crossed arrow has tail/cross on the positive centre and head toward the negative centre, not the other way round.

    Therefore, Statement I is incorrect.

  3. Check Statement II

    Statement II says:

    The crossed arrow of the dipole moment symbolizes the direction of the shift of charges in the molecules.

    This is correct. The crossed arrow represents the direction of electron density shift / charge displacement in the molecule.

    Therefore, Statement II is correct.

  4. Choose the correct option

    Hence:

    • Statement I: Incorrect
    • Statement II: Correct

    So the correct option is: B\boxed{\text{B}}B​

PreviousNext

More from Chemical Bonding and Molecular Structure

  • The number of molecules or ions from the following, which do not have odd number of electrons are ​. (A) NO 2​ (B) ICl 4−​ (C) BrF 3​ (D) ClO 2​ (E) NO 2+​ (F) NO2023 · Numerical
  • The magnetic behaviour of Li2​O,Na2​O2​ and KO2​, respectively, are :2023 · MCQ
  • The bond dissociation energy is highest for2023 · MCQ
  • According to MO theory the bond orders for O22−​, CO and NO+ respectively, are2023 · MCQ
  • Match List I with List II Choose the correct answer from the options given below : Includes table2023 · MCQ
  • For OF2​ molecule consider the following : A. Number of lone pairs on oxygen is 2 . B. FOF angle is less than 104.5∘. C. Oxidation state of O is −2. D. Molecule is bent 'V' shaped. E. Molecular…2023 · MCQ
  • Match List I with List II Choose the correct answer from the options given below : Includes table2023 · MCQ
  • Amongst the following, the number of species having the linear shape is ​. XeF2​,I3+​,C3​O2​,I3−​,CO2​,SO2​,BeCl2​…2023 · Numerical