Allocating Void pointer memory using new operator

I was Implementing Generic List in C++ and was able to successfully allocate memory of void*  data using malloc ( malloc return void *) . But how about using new. Can we do below

void Test()
{
           void *f= new void[25];  //void *f=malloc(25); --> Works
           delete f;
}

The Answer is NO.
Because void has no size . How much space has to be allocated is not known.

So if you need to allocate memory using new use operator like

void Test()
{
          void *f=operator new(25);
          delete f;
}