When a person is in the state of major ritual impurity, he is obliged to perform ghusul! If there is no water, he must perform tayammum! Once he finds water,he must perform Ghusul! Therefore, if this person forgot and didn’t perform ghusul when he found water, his prayers are invalid and he must perform them again!
Read moreYour prayer is valid as you didn’t know. Those who prayed from the beginning with him, their prayer is invalid if they knew that.
Read moreDepends on what extend. However you will not be rewarded for that prayer except the part you were concentrating in.
Read moreThe sunnah is not to pray the sunnah before and after thuhur, after Maghreb and after Isha when traveling and to pray everything else.
Read moreIf the rain is heavy then yes, it is permissible.
Read moreThis is part of the sunnah but is doesn’t suffice for the two Rakah after Maghrib as this is different from it.
Read moreThis is an incorrect information.
Read moreA:http://islamqa.info/en/115854
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