Differeent notice period for employer and employee in probation period is it valid

In appointment Letter , Co can terminate employee at any time during probation. But employee neeed to serve two month notice period during probation if employee want to resign. 

Is such uneven notice period is valid in employment contract. what is a way out to the employee if employer forcing the employee by thretening the notice period cluase. and other things.

Further Employee retain 15% of salary as a security deposit during intial 6 month , is such terms of employment valid in mahsrashtra.