no issues,
appointment can not be denied to you if there is trial going on
even if there is conviction of govt employee (less than 3 years imprisonment) then his employer will have to hear the employee before arriving at conclusion to dismiss from service
so u can join ias even with trial
there are so many judgments of various courts when they quashed decisions of govt to deny appointments to undertrials
and finally do u believe that charges against you are true? and can be proved?
if u have done nothing wrong and if the charges are false, no force can deny u appointment, 498a will fail.
remember, 498a conviction comes in following cases (by the history of convictions):
1, if the wife on the day of separation (or within a few days of separation) gets herself admitted in hospital, and has MLR for her injuries
2. if husband has remarried during separation
3. if there is definite proof of demanding dowry
if your case does not fall in this category, just chillllllllllllllllllllllll