If a physical and chemical change takes place at a constant pressure then the heat change during the process is called__________________?

Related Mcqs:

1. For a given process the heat changes at constant pressure (qp) and at constant volume (qv) are related to each other as___________________?

   A. qp = qv
   B. qp < qv
   C. qp > qv
   D. qp = qv / 2

2. Any process of chemical decay of metals due to the action of surrounding medium is called__________________?

   A. activation
   B. enameling
   C. corrosion
   D. coating

3. The pressure during the molar heat of fusion is kept________________?

   A. 0 atmosphere
   B. one atmosphere
   C. 2 atmosphere
   D. 10 atmosphere

4. The process of aluminium extraction is called__________________?

   A. Hall process
   B. Thermite process
   C. Haber process
   D. Contact process

5. The quantity of heat required to convert one mole of liquid into its vapours at its boiling point is called molar heat of__________________?

   A. vaporization
   B. evaporation
   C. crystallization
   D. sublimation

6. If 1/V is plotted on X-axis and pressure on Y-axis at constant temperature what should appear ________________?

   A. Straight line parallel to x-axis
   B. Straight line parallel to y-axis
   C. Straight line
   D. Curve

7. For a gas where volume and pressures are 1dm3 and 2 atm respectively what should be its new volume when pressure is increased to 6 atm at constant temperature ?

   A. 1/2dm3
   B. 1/3dm3
   C. 1/4dm3
   D. 2/3dm3

8. For a reaction involving only gases at 25?C the equilibrium constant can be expressed in terms of molarity Ke or partial pressure Kp. Which is true about the numerical value of Kp ?

   A. Kc is generally greaer than Kp
   B. Kc is generally less than Kp
   C. Kc is generally equal to Kp
   D. Kc is equal to Kp if the total moles of reactants and products are equal

9. For a given mass of a gas at constant temperature, if the value V becomes 3 times, the pressure will becomes__________?

   A. 3P
   B. P/3
   C. 3P/T
   D. 6P

   Submitted by: Muhammad Ali Kunbhar

10. Pressure remain constant, at which temperature the volume of gas becomes twice of what it is at 0°C?

    A. 546 °C
    B. 546 K
    C. 200°C
    D. 273 K

    Submitted by: Muhammad Ali Kunbhar