Is it necessary to say that petitioner is deposing falsely to all ques

I have one question here...During cross we generally have to take denails of every allegations. Example: "You have deposed falsely in para 16 that she went to mumbai n 12 nov 2017" However my doubt is: Q. If we have asked certain question like " Have you ever send gifts to your wife" and if he says yes and we ask more questions and ask whether he have any evidence.. and ultimately he does not have evidence...so do wee need to take denials of this question also that :you have deposed falsely now that you sent gift to ur wife" or it will be automatically understood that no evidence is there for gifts hence he has deposed falsely. Please guide. second example: Have you ever purchased clothe for your wife? he says yes then we will say do you have any evidence..if he says no..so do we need to necessarily say " you are saying wrong"Basically i want to understand apart from denials of evidence affidavit that he is saying falsely do we need to take denials of extra question