eg:- 2FeCl_​3+SnCl₂=2FeCl +SnCl₂what if we are given thisreaction and asked to state whether it is a 1st/2nd/3rd ordered reaction and no information is given about its initial or final conc. also its rate is not given,then how to find?

No,it is not possible to get the order or reaction without the rate because order of reacton is exponents raised to the con term in rate law...the question in incorrect..Yes if the slowest elementary reaction for this reaction is given then you can find the order by adding its sticometric coefficient..