u should spend not more than 30 to 40 minutes for each question.... usually it happens in exam that we naturlly spend more time on 1st qustn at the cost of others ,because ofcourse its our best prepared qustn and we keep on writing andwriting on it ...it happed with me too as ispent 1hr on 1st qustn and then i had to hurry and ,in the process, my hand writing sufferd ...so time management is v v v impt while attempting ppr .