Which of the following will decay faster ?

Which of the following will react faster with Lucas reagent ?

Which of the following reacts at a faster rate to form cyanohydrin

Which of the following reacts at a faster rate to form cyanohydrin

Which of the following undergoes faster solvolysis ?

Which of the following undergoes faster solvolysis ?

In which of the following decays the atomic number decreases? (i) alpha -decay (ii) beta^(+) -decay (iii) beta^(-) -decay (iv) electron capture