Nitriding of steel is done (in electric furnace) at ________ °C?

Pick out the wrong statement?

Which of the following does not produce a change in the value of rate constant of a reaction?

Out of the following, nucleus of ________ atom contains the largest number of neutrons?

The diffusion co-efficient in m2/s. of acetic acid in benzene (liquid in liquid) is________?

Pulverised fuel fired furnaces employ ________ fuel firing?