The photon of hard gamma radiation knocks a proton out of ²⁴₁₂Mg nucleus to form

• the isotope of parent nucleus

• the isobar of parent nucleus

• the nuclide
  

• the isobar of

The rate equation for the reaction 2A + B → C is found to be: rate k[A][B]. The correct statement in relation to this reaction is that the

• unit of K must be s^-1

• values of k is independent of the initial concentration of A and B

• rate of formation of C is twice the rate of disappearance of A

• t_1/2 is a constant

The rate of a chemical reaction doubles for every 10ºC rise of temperature. If the temperature is raised by 50ºC, the rate of the reaction increases by about

• 10 times

• 24 times

• 32 times

• 64 times

The rate of a reaction doubles when its temperature changes from 300K to 310K. Activation energy of such a reaction will be (R = 8.314 JK^–1 mol–1 and log 2 = 0.301)

• 53.6 kJ mol^-1

• 48.6 kJ mol^-1

• 58.5 kJ mol^-1

• 60.5 kJ mol^-1

The resistance of 0.2 M solution of an electrolyte is 50 Ω. The specific conductance of the solution of 0.5 M solution of the same electrolyte is 1.4 S m^-1 and resistance of the same solution of the same electrolyte is 280 Ω. The molar conductivity of 0.5 M solution of the electrolyte in Sm^-2 mol^-1 is

• 5 x 10^-4

• 5 x 10^-3

• 5 x 10³

• 5 x 10²