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.

    A suitable unit for gravitational constant is

    A

    kg−m  sec−1kg - m\,\,se{c^{ - 1}}

    B

    N  m−1secN\;{m^{ - 1}}{\rm{sec}}

    C

    N  m2  kg−2N\;{m^2}\;k{g^{ - 2}}

    D

    kg  m  sec−1kg\;m{\rm{\;se}}{{\rm{c}}^{ - 1}}

    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 :Gravitational constant, Units and dimensions, Newton's Law of Gravitation

    2.

    Which one has the dimensions different from the remaining three

    A

    Power

    B

    Work

    C

    Torque

    D

    Energy

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Dimensions, Power, Work, Torque, Energy

    3.

    In the following list, the only pair which have different dimensions, is

    A

    Linear momentum and moment of a force

    B

    Planck’s constant and angular momentum

    C

    Pressure and modulus of electricity

    D

    Torque and potential energy

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Dimensions, Linear momentum, Moment of a force, Planck's constant, Angular momentum, Pressure, Modulus of elasticity, Torque, Potential energy

    4.

    The dimensions of Planck’s constant is same as that of

    A

    Angular momentum

    B

    Linear momentum

    C

    Work

    D

    Coefficient of viscosity

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Planck's constant, Dimensions, Angular momentum, Linear momentum, Work, Coefficient of viscosity

    5.

    The dimensions of stress are equal to

    A

    Force

    B

    Pressure

    C

    Work

    D

    1Pressure\frac{1}{{{\rm{Pressure}}}}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Stress, Pressure, Dimensions

    6.

    The dimensions of Planck’s constant is same as that of

    A

    Angular momentum

    B

    Linear momentum

    C

    Work

    D

    Coefficient of viscosity

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Planck's constant, dimensions, angular momentum, linear momentum, work, coefficient of viscosity

    7.

    “Pascal-Second” has dimension of

    A

    Force

    B

    Energy

    C

    Pressure

    D

    Coefficient of viscosity

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Units, Dimensions, Coefficient of viscosity, Pressure

    8.

    Which pair has the same dimensions

    A

    Work and power

    B

    Density and relative density

    C

    Momentum and impulse

    D

    Stress and strain

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :dimensions, work, power, density, relative density, momentum, impulse, stress, strain

    9.

    Which of the following quantities has the same dimensions as that of energy

    A

    Power

    B

    Force

    C

    Momentum

    D

    Work

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Dimensions, Energy, Work, Power, Force, Momentum

    10.

    Which of the two have same dimensions

    A

    Force and strain

    B

    Force and stress

    C

    Angular velocity and frequency

    D

    Energy and strain

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Dimensions, Physical quantities, Angular velocity, Frequency, Force, Strain, Stress, Energy

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