Q. 1. Are the Holy Orders of the Orthodox Church valid? And if they are valid, does that mean that the Sacrament of the Holy Eucharist is also valid?

A. 1. Answer the first question, the Holy Orders in the Orthodox Church are valid orders, even though the Orthodox Churches are not in communion with the Catholic Church of Rome.

Answering the second question, that means the Sacrament of the Eucharist that is confected in the Orthodox Churches is valid.

Even though the Sacrament of the Eucharist in the Orthodox Church is valid, the faithful (Catholics) should not receive this Sacrament until such time as the Orthodox Church is once more in communion with the Catholic Church.