Which one is the right value for R ?

Related Mcqs:

1. An element having low value of ionization energy and low value of electron affinity is likely to belong to__________________?

   A. Group IA
   B. Group IB
   C. Group VIIA
   D. Group VIII

2. The magnetic quantum number (QN) has its values determined directly by the value of_______________?

   A. Principal (QN)
   B. Azimuthal (QN)
   C. Spin (QN)
   D. Both A & B

3. 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

4. Kc value has_______________?

   A. No units
   B. Units
   C. Both A & B
   D. None

5. In galvanic cell Zn acts as an anode so its value of standard reduction potential in comparison to coupled electrode would be________________?

   A. greater
   B. lesser
   C. sum of reduction and oxidation potentials
   D. none

6. Greater value of standard reduction potential smaller will be tendency______________?

   A. to form positive ions
   B. to form negative ions
   C. gain electrons
   D. all are possible

7. The value of activation energy is primarily determined by_______________?

   A. Temperature
   B. Effective collision
   C. Concentration of reactants
   D. Chemical nature of reactants and products

8. Which ion will have maximum value of heat of hydration ?

   A. A1+3
   B. Cs+
   C. Ba+
   D. Mg+2

9. The absolute value of charge on electron was determined by ________ ?

   A. J.J.Thomson
   B. Chadwick
   C. Rutherford
   D. Robert Millikan

   Submitted by: Rashid Mehmood

10. Value of normal atmospheric pressure at sea level at 0°C is______?

    A. 1 atm
    B. 760 Torr
    C. 76cm of Hg
    D. All of these 

    Submitted by: Zahid Jagirani