1.

    The ionization energy of hydrogen is 13.6 eV. Express this energy in joules per mole using the following conversions: 1 eV = 1.602imes10−191.602 imes 10^{-19} J and Avogadro's number = 6.022imes10236.022 imes 10^{23} mol−1mol^{-1}.

    A

    1.31imes1031.31 imes 10^3 J/mol

    B

    2.18imes10−202.18 imes 10^{-20} J/mol

    C

    1.31imes1061.31 imes 10^6 J/mol

    D

    8.21imes1058.21 imes 10^5 J/mol

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

    Related Questions

    1.

    The speed of light is approximately 3imes1083 imes 10^8 m/s. If a star is 4 light-years away, what is its distance in kilometers? (1 light-year = distance light travels in one year)

    A

    3.8imes10103.8 imes 10^{10} km

    B

    1.2imes10131.2 imes 10^{13} km

    C

    3.8imes10133.8 imes 10^{13} km

    D

    1.2imes1091.2 imes 10^9 km

    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, Speed, Distance, Time

    2.

    The dimensions of couple are

    A

    ML2T−2M{L^2}{T^{ - 2}}

    B

    MLT−2ML{T^{ - 2}}

    C

    ML−1T−3M{L^{ - 1}}{T^{ - 3}}

    D

    ML−2T−2M{L^{ - 2}}{T^{ - 2}}

    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 :Couple, Dimensions, Torque, Force, Distance

    3.

    The constant of proportionality 14πε0  \frac{1}{{4{\rm{\pi }}{{\rm{\varepsilon }}_0}}}\; in Coulomb’s law has the following units

    A

    C−2Nm2{{\rm{C}}^{ - 2}}{\rm{N}}{{\rm{m}}^2}

    B

    C2N−1m−2{{\rm{C}}^2}{{\rm{N}}^{ - 1}}{{\rm{m}}^{ - 2}}

    C

    C2Nm2{{\rm{C}}^2}{\rm{N}}{{\rm{m}}^2}

    D

    C−2N−1m−2{{\rm{C}}^{ - 2}}{{\rm{N}}^{ - 1}}{{\rm{m}}^{ - 2}}

    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 :Coulomb's Law, Units of Force, Units of Charge, Units of Distance, Permittivity of Free Space

    4.

    Dimensional formula for torque is

    A

    L2MT−2{L^2}M{T^{ - 2}}

    B

    L−1MT−2{L^{ - 1}}M{T^{ - 2}}

    C

    L2MT−3{L^2}M{T^{ - 3}}

    D

    LMT−2LM{T^{ - 2}}

    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 :torque, dimensional analysis, force, distance

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