Is this a god vocal range good ??

Yes that's a perfect range. You should be able to sing anything given to you in a choir with that range. There may be a few notes in solos outside of your range but you'll develop that. BTW, the previous poster is a moron...no one on earth has a seven octave range. Only a true b with an exceptionally developed falsetto can hit 5 octaves at the VERY most. Do your best to develop the voice you have, ignore people like the previous poster, and don't try to force yourself to be Mariah Carey or whatever. You do that and you'll go far.