Ramadhaan & Fasting

Q: I missed 10 fasts during Ramadan due to illness. I am recovered now and wish to complete my missed fasts. I planned to keep the 10 during the first days of Zil Hijjah not expecting any additional reward but just as a sense of fasting is more prevalent around me. 

Please advise if this is ok as our local imam in a talk says Fardh and Sunnah cannot be combined! Should I rather wait and fast after or continue in these days? If I do fast, my intention is of my qadha and will I be in sin for keeping these qadha in the auspicious days of Sunnah fasting?

Q: If a person was fasting and icing sugar or bicarb blew and the taste went in the mouth (like through the nose) by mistake, is the fast valid?

Q: If a person making sunnat itikaaf left the musjid mistakenly, does he have to repeat all 10 days or just one. 

Also what should a person do after his itikaaf is broken, should he continue or go home?

Q: A school student wants to sit for Itikaaf but he will have to do online school in Itikaaf. Is he allowed to do this while in Sunnah Itikaaf? 

Is a university student allowed to study his text book material in the Masjid? 

Is a working class person allowed to take his laptop with in Sunnah Itikaaf and do his work?

Q: At asr time, one went to toilet and noticed a change of colour in ones discharge however one was unsure whether it was haidh or not. At maghrib time, after breaking the fast; before performing maghrib salaah; one saw that ones haidh had commenced. 

Will this fast be valid or will one have to repeat it?

Q: Does touching the private parts and pubic hair break the fast?

Q: I like to ask you about fidyah. 

1. If you can't fast in Ramadan because of ill health, do you need to give fidyah for 30 days? 

2. Do you need to give fidyah to one person or more than one persons? 

3. Can I give fidyah to a charity organisation then they may distribute it?

Q: Is it permissible to wet the miswak before using it while fasting?