I would like to ask what it is for正确还是i would like to ask what is it for 正确？

具体我不知道您的原话，但是从语法上讲，肯定这种是正确的：I would like to ask what it is for
后面的从句并非单个语问提问，所以一定要正常语序，比如：I donot know what he said. I would like to know what animal it is.
如果是疑问句则是：what animal is it?

第一个

第一个。
what it is for是作为简介引语作ask的宾语的。简介引语都用正常语序。
直接引语才用疑问语序。