The capacity of a spring to store energy is called the spring form co-efficient. Stiffness of a spring is measured by the____________________?

Related Mcqs:

1. Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ______________ with the increase of reduced temperature?

   A. Decreases
   B. Increases
   C. Remains constant
   D. Decreases logarithmically

2. Activity co-efficient is a measure of the____________________?

   A. Departure from ideal solution behaviour
   B. Departure of gas phase from ideal gas law
   C. Vapour pressure of liquid
   D. None of these

3. If the internal energy of an ideal gas decreases by the same amount as the work done by the system, then the____________________?

   A. Process must be isobaric
   B. Temperature must decrease
   C. Process must be adiabatic
   D. Both B. and C.

4. To obtain integrated form of Clausius-Clapeyron equation, ln (P2/P1) = (ΔHV/R) (1/T1 – 1/T2) from the exact Clapeyron equation, it is assumed that the____________________?

   A. Volume of the liquid phase is negligible compared to that of vapour phase
   B. Vapour phase behaves as an ideal gas
   C. Heat of vaporisation is independent of temperature
   D. All A , B. & C.

5. Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is ___________________?

   A. 0
   B. ∞
   C. +ve
   D. -ve

6. The molar excess Gibbs free energy, gE, for a binary liquid mixture at T and P is given by, (gE/RT) = A . x1. x2, where A is a constant. The corresponding equation for ln y1, where y1 is the activity co-efficient of component 1, is__________________?

   A. A . x22
   B. Ax1
   C. Ax2
   D. Ax12

7. Total energy at a point comprises of _____________ energy?

   A. Potential & kinetic
   B. Pressure
   C. Internal
   D. All A., B. & C.

8. Equilibrium constant of a reaction varies with the____________________?

   A. Initial concentration of the reactant
   B. Pressure
   C. Temperature
   D. None of these

9. Fugacity is a measure of the____________________?

   A. Escaping tendencies of the same substance in different phases of a system
   B. Relative volatility of a mixture of two miscible liquids
   C. Behaviour of ideal gases
   D. None of these

10. The necessary condition for phase equilibrium in a multiphase system of N components is that the____________________?

    A. Chemical potentials of a given component should be equal in all phases
    B. Chemical potentials of all components should be same in a particular phase
    C. Sum of the chemical potentials of any given component in all the phases should be the same
    D. None of these