If a boy has haram relation with girl, he will be told to stop being in relation and some more things but when a girl has been in a relation or if she does drugs or any bad deed, why she is been more criticized than a boy?
And is the punishment of hereafter more for a girl than a boy if she commits a same mistake?

This is just the way society views women but when they go before Allah for judgement there is no difference of male and female in regards to sin.

Recently a incident took place here in India of a rape of young woman.
I saw a status in that it had said that 'O creator if you write the destiny of a girl then please dont write rape in her destiny'
So does Allah(swt) write these kind of incidents in human beings fate or is it Allah(swt) has given the power to do right or wrong and he is going to look on the day of resurrection?

Allah is Just and does not wrong His creatures. Wrongdoing comes from mankind misusing the faculties Allah gave him.

I wanted to know if there is a source where we can find authentic hadith by masumeen (as) regarding rights of Husband over wife, parents and family and rights of wife over husband, parents and family?

Yes in the treatise of rights by Imam Sajjad (as) Right number 20, 22, 23

Will kinship ties with my siblings and mother remain in the hereafter, meaning for example, will my sister still be my sister in the next world?

Yes

I wanted to know about the Ayats in which the Quran says the Prophet(saw) "sinned"
Qur'an 40:55 47:19 48:2

Page 22 onwards

https://www.al-islam.org/printpdf/book/export/html/12219

If a piece of clothing has urine on it, can I put it in the washing machine and wash it twice

Yes washing machine is fine. It washes it twice once for wash and second for rinse

If a baligh son says he is athiest and is following wajib only because he loves and respects his parents, in that situation what are the responsibility of parents. How should they treat him?

You should try to bring him back to the path of Islam through discussion and dialogue but not by force or being harsh.

There were rumours about the restaurants McDonald's cooking their fries in beef lard/oil if I remember correctly but apparently they stopped that a few years back. However some people still say it's best not to eat their food as they could still be doing so or even just using the same utensils for vegetarian foods which we can eat and for haram foods too.

Also a lot of other restaurants such as domino's pizza, subway, nandos and a lot of other takeaways - they have halal options, vegetarian options and also haram options. Can we still buy and eat from their food or should we avoid due to the possibility of cross contamination and foods being cooked in the same oven for example?

As far as McDonalds USA if you search their ingredients you will see they do coat their fries and hash browns in non halal animal fat. So this would make it unlawful for us.

As for other restaurants we can eat the halal and vegetarian options as long as we are not aware the food has been cross contaminated. Most of the times they would not do that because of threat of being sued by vegans or other religious groups who do not eat meat.

Allah knows best.

I just have a few questions on the issue of who is included in the ahlul bayt. I’ve heard arguments from other sects in Islam that in the Quran allah has mentioned in surah Hud ayah 73 that Sarah the wife of the prophet Ibrahim was blessed on by Allah and referred to her as the people of the house. So why isn’t the wives of the Prophet Muhammad part of the ahlul bayt. Next argument is surah al-ahzab the ayahs before ayah 33 and the ayah itself talks about the wives of the prophet, so it’s thought they are included in the ahlul bayt. What’s the imami school of thoughts opinions on both these arguments?

Sarah was prophet Ibrahim’s (as) cousin thus was blood related.

The beginning part of verse 33:33 addresses the women where as the the grammatical structure changes from feminine to masculine when it addresses the Ahl ul Bayt (as). See this video below for more detailed grammatical explanation if you like


https://youtu.be/3RFY1mImv9c

If a person does not recite “allahumma salli ala Muhammadiw wa ali Muhammad” in the tashahhud of his salaat. Is the salaat valid?

I submitted this question to the office of Ayatollah Sayed Sistani and the reply i got was this:

If the person did not know the ruling and was not negligent in learning it, then he does not have to perform Qada’.