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JEE Main20246 Apr 2024Evening ShiftPhysicsUnits and DimensionsActual

Given below are two statements : Statement (I) : Dimensions of specific heat is [ L ^2 ~T ⁻² ~K ⁻¹ ] . Statement (II) : Dimensions of gas constant is [ M L ^2 ~T ⁻¹ ~K ⁻¹ ] . In the light of the above statements, choose the most appropriate answer from the options given below.

Options

  1. ABoth statement (I) and statement (II) are correct
  2. BStatement (I) is correct but statement (II) is incorrect
  3. CBoth statement (I) and statement (II) are incorrect Statement (I) is incorrect but statement (II) is correct
  4. DStatement (I) is incorrect but statement (II) is correct

Correct answer

B. Statement (I) is correct but statement (II) is incorrect

Step-by-step solution

aligned & Q = mS T & s = Q m T & [ s ]= [ ML ^2 ~T ⁻² MK ] & [ s ]= [ L ^2 ~T ⁻² ~K ⁻¹ ] aligned Statement-(I) is correct aligned & PV = nRT R = PV nT & [ R ]= [ ML ⁻¹ ~T ⁻² ] [ L ^3 ] [ mol ][ K ] & [ R ]= [ ML ^2 ~T ⁻² ~mol ⁻¹ ~K ⁻¹ ] aligned Statement-II is incorrect

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