• Should water be put in the deceased`s mouth and nose while washing him/her?
No, it shouldn`t.
• Is it permissible to fast on behalf of the dead who died owing missed fast to make up ?
His relative should fast on his behalf, and it is permissible for the guardians to give permission to non-relatives of the dead to fast on his behalf as well.
• What should the man, whose wife wasn`t on good terms with his mother, do?
Both the mother and the wife have rights on the man in question; therefore, each should be given her rights justly, and he should resort to wisdom to please both of them and make reconciliation.
• Is it true that whatever is dry is pure even if there was impurity on it ?
The impure material object does not soil (make impure) anything else unless the impurity is wet and transferable. But, if the impurity is dry or non-transferable, then there is no problem.
Fuqaha has stated that: There is no disagreement between Muslim scholars that when a dry impurity touches something dry it does not make the latter impure.