Pick out the correct statement?

Pick out the wrong statement?

Which of the following is not a composition measuring instrument?

If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is ________?

The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by________?

A material is able to retain the deformation permanently by virtue of its________?