I'm so confused so I'm just gonna go alongWhat? You're being quizzed, you tell me what you know and I'll let you know how right you are.
Kinjutsu techniques are usually beyond the scope of normal F ranked techniques. They cause greater and irreparable damage to the user, pervert the laws of nature to achieve feats such as possessing the body of others, longevity, or even immortality as with Orochimaru's case, or bringing the raising the dead to fight on your behalf as done through Edo Tensei. In addition, these techniques are known to cause massive collateral damage, to the point where an entire village, landmark, or even several landmarks can be completely eradicated.
As I mentioned in this training thread though, not all Kinjutsu have to cause irreparable damage to the user, but can be intentionally dangerous to the user like in the case of the multiple shadow clones technique.