My question is when we are in middle of prayers and has realized that your wadhu is broken (passing of gas) so in this case do I have to pay any Kaffara or I

In the name of Allāh, Most Gracious, Most Merciful

Assalāmu ῾alaykum wa Rahmatullāhi Wabarakātuh

There is no kaffārah, and you will have to repeat the salāh. In the second scenario it is permissible for the Imām to appoint someone from amongst the muqtadīs as his deputy (preferably the Mudrik) however, the Masā’il of Binā (basing one salāh on another) are complicated and because of a lack of knowledge the possibility of mistakes is inevitable. It is therefore better not to continue the salāh. Instead, one should break the salāh by making salām and repeat the entire salāh, and there is no kaffārah.

(Fatāwa Mahmodiyyah, Vol.6, Pg.576)

And Allāh Ta῾āla Knows Best
Wassalāmu ῾alaykum

Ml. Abduz Zaman,
Student Dārul Iftā

Checked and Approved by:
Mufti Ebrahim Desai
Dārul Iftā