1.

    A chemist measures a reaction rate as 2.5imes10−32.5 imes 10^{-3} mol L−1^{-1} s−1s^{-1}. Express this rate in molecules cm−3cm^{-3} μs−1\mu s^{-1} (molecules per cubic centimeter per microsecond). Avogadro's number = 6.022imes10236.022 imes 10^{23} molecules/mol.

    A

    1.5imes10121.5 imes 10^{12} molecules cm−3cm^{-3} μs−1\mu s^{-1}

    B

    2.5imes10182.5 imes 10^{18} molecules cm−3cm^{-3} μs−1\mu s^{-1}

    C

    1.5imes10151.5 imes 10^{15} molecules cm−3cm^{-3} μs−1\mu s^{-1}

    D

    4.2imes10204.2 imes 10^{20} molecules cm−3cm^{-3} μs−1\mu s^{-1}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Unit Conversion, Reaction Rate, Avogadro's Number

    Related Questions

    1.

    The dimensional formula for areal velocity is

    A

    [M0L−2T]\left[ {{{\rm{M}}^0}{{\rm{L}}^{ - 2}}{\rm{T}}} \right]

    B

    [M0L−2T−1]\left[ {{{\rm{M}}^0}{{\rm{L}}^{ - 2}}{{\rm{T}}^{ - 1}}} \right]

    C

    [M0L2T−1]\left[ {{{\rm{M}}^0}{{\rm{L}}^2}{{\rm{T}}^{ - 1}}} \right]

    D

    [M0L2T]\left[ {{{\rm{M}}^0}{{\rm{L}}^2}{\rm{T}}} \right]

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :dimensional analysis, areal velocity

    2.

    Which one of the following represents the correct dimensions of the coefficient of viscosity?

    A

    [ML−1T−2]\left[ {{\rm{M}}{{\rm{L}}^{ - 1}}{{\rm{T}}^{ - 2}}} \right]

    B

    [MLT−1]\left[ {{\rm{ML}}{{\rm{T}}^{ - 1}}} \right]

    C

    [ML−1T−1]\left[ {{\rm{M}}{{\rm{L}}^{ - 1}}{{\rm{T}}^{ - 1}}} \right]

    D

    [ML−2T−2]\left[ {{\rm{M}}{{\rm{L}}^{ - 2}}{{\rm{T}}^{ - 2}}} \right]

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :viscosity, dimensional analysis, force, area, velocity gradient

    3.

    A rectangular field is 200 m long and 150 m wide. What is its area in hectares?

    A

    2 hectares

    B

    3 hectares

    C

    4 hectares

    D

    5 hectares

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Application
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Unit Conversion, Area

    4.

    Solar constant is defined as energy received by earth per cm2{\rm{c}}{{\rm{m}}^2} per minute. The dimensions of solar constant are

    A

    [ML2T−3]\left[ {{\rm{M}}{{\rm{L}}^2}{{\rm{T}}^{ - 3}}} \right]

    B

    [M2L0T−1]\left[ {{{\rm{M}}^2}{{\rm{L}}^0}{{\rm{T}}^{ - 1}}} \right]

    C

    [ML0T−3]\left[ {{\rm{M}}{{\rm{L}}^0}{{\rm{T}}^{ - 3}}} \right]

    D

    [MLT−2]\left[ {{\rm{ML}}{{\rm{T}}^{ - 2}}} \right]

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Dimensional Analysis, Energy, Area, Time

    5.

    The dimensional formula for areal velocity is

    A

    [M0L−2T]\left[ {{{\rm{M}}^0}{{\rm{L}}^{ - 2}}{\rm{T}}} \right]

    B

    [M0L−2T−1]\left[ {{{\rm{M}}^0}{{\rm{L}}^{ - 2}}{{\rm{T}}^{ - 1}}} \right]

    C

    [M0L2T−1]\left[ {{{\rm{M}}^0}{{\rm{L}}^2}{{\rm{T}}^{ - 1}}} \right]

    D

    [M0L2T]\left[ {{{\rm{M}}^0}{{\rm{L}}^2}{\rm{T}}} \right]

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Dimensional analysis, Areal velocity

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