Yes.

33% is the passing marks for CBSE across all the subjects.

Also, official statement is given below -

"The qualifying marks in each subject of external examination shall be 33% at Secondary/Senior School Certificate Examinations. However at Senior School Certificate Examination,in a subject involving practical work, a candidate must obtain 33% marks in the theory and 33% marks in the practical separately in addition to 33% marks in aggregate, in order toqualify in that subject "

Good Luck!!!