My question is regarding Scheme-2 of Class X board exam. If my ward opts for scheme 2Will he continue in the same school?\tCan he move to some other CBSE school?Please help me out.

@ indrajeet 
yes , what u need to understand is that cbse have 2 types of board exam – one is board based anathor is school based . 
so, if he opt for board based exam , then after 10^th , he can even change school , and also board if he wants . there the paper will be evaluated by diffrent teachers , 
anathor is of school based exam , where the regional school teacher will evaluate the copy , and by doing so , u can change the school but u have to restrict within the cbse board only , u cannot change the board by appearing school based but for sure u can change the school . 
for that reason its recommended to gove board based as its safe from every side . 
ALL THE BEST to your ward ..