question words in english are called wh words . i m here providing the hindi equivalent of all the wh words. what = kya = क्या who = kaun = कौन which = kaun sa it is used for nonliving things where = kaha ya jaha = जहाँ when = kab ya jab = कब how = kaise = कैसे why = kyon = क्यों whom = kisko ya kiska ya jiska =

Kay means what,kaun means who,kahan means where,kab means when.