Question

within the brackets.
i. Did you know that? (into passive voice)​

Answer 1

Answer:

was that known by you?

it's mostly used in active voice

Answer 2

Answer:

Here the sentence in passive voice would be : Was that known to you?

Explanation:

In passive voice,the object or action is given more preference than the subject or doer.

Here ,subject is you and object is that and know is the verb.

Since this is an interrogative sentence ,passive voice becomes Auxillary verb(was) + object(that)+verb(known)+ to + subject (you).

Hope it helps