Is the husband obliged to give zakaat al-fitr on behalf of his Christian wife?

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Check below answers in case you are looking for other related questions:
Can a divorced woman pay zakaat al-fitr on behalf of herself and her children to their father?
Zakaat al-Fitr on behalf of a foetus

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Related Answers:
He did not pay zakaat al-fitr; should he pay it now?
Voluntarily giving more than a saa’ for zakaat al-fitr
He forgot to pay zakaat al-fitr before the Eid prayer
Can a divorced woman pay zakaat al-fitr on behalf of herself and her children to their father?
Zakaat al-Fitr on behalf of a foetus

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