Seyed Ali Shobayri

Bismillah, 

Asalamu Alaykom, 

There is no problem to pray in such a room.
 

May Allah grant you success 

Bismillah, 

Asalamu Alaykom, 

The majority of Shia jurists do not permit eating crab 

May Allah grant you success 

Bismillah, 

If one knows that a product is fried with non-halal meat, then it would become najis (impure) and haram to eat. If one didn't know then there is no sin upon them. 
 

May Allah grant you success 

Bismillah, 

Asalamu Alaykom, 

Delaying Salah (unless delaying it would cause it to become qada) isn't haram. Yes, it is highly recommend for one to pray on time and this would gain them the maximum reward. One should think of it in the way that each minute that goes by where Salah is delayed, is one's reward decreasing. 
 

May Allah make us among those who are able to regularly pray our Salah on time

Bismillah 

Asalamu Alaykom, 

A good dua to recite in the last sajda is the following: 

اللهم اني اسألك الراحة عند الموت والمغفرة بعد الموت والعفو عند الحساب يا كريم يا وهاب

O Allah verily I ask for ease during death, and forgiveness after death and pardon during the judgement, O giving one, O the giving one. 

May Allah grant you success 

Bismallah, 

Asalamu Alaykom, 

The following answer may help you: 

https://www.al-islam.org/ask/is-it-sinful-for-a-girl-to-marry-without-the-permission-of-her-parents 

May Allah grant you sucrsss

Bismillah, 

Asalamu Alaykom, 

Yes inshallah one can get a reward for it however it is recommended to try and learn to recite the duas in the original Arabic. This is so that one may read the dua in it's full eloquence and feel it's true power. If one cannot, the translation is fine. 
 

May Allah grant you success 

Bismillah, 

Asalamu Alaykom, 

it is not just permissible but can also become obligatory for one to do this in order for people to know the truth and be guided.
 

Fatima Al-Zahra (sa) in her Fadak sermon instructs is to fight the heads of kufr (such as the khulafah who usurped the position of Imam Ali). This 'fight' can be an intellectual type of war or fight to establish truth, 

Yes, if one isn't in a state of taqiya or danger then they may expose these figures in an academic manner by using the sources of the opposing sect. One doesn't need to insult for them to be able to achieve this although some may become naturally offended by hearing mere criticism towards figures they regard in high esteem. 

May Allah grant you success 

Bismillah,

Asalamu Alaykom, 

This wouldn't invalidate wudu or salah 

May Allah grant you success 

Bismillah, 

Asalamu Alaykom, 

Eating with your non-muslim students is allowed provided that the food you personally consume is halal, and provided that eating with them wouldn't include any other haram actions such as free-mixing or alcohol on the same table as yourself. 
 

May Allah grant you success 

Bismillah, 

Asalamu Alaykom, 

No this doesn't break wudu unless it causes one to ejaculate. 
 

May Allah grant you success 

Bismillah, 

Asalamu Alaykom, 

If they are mahram to each other then holding hands is permitted. So if they are 'engaged' meaning that they have either conducted a temporary or permanent aqd which has been read for them, then it's ok. If neither have been read for them yet, then they aren't allowed to physically touch each other regardless of what the parents say. 
 

May Allah grant you success