Zero and first conditional

The table will break if you ________ (sit) on it.

If I see him, I ___________ (give) him a lift.

If he _______ (read) in bad light, he will ruin his eyes.

when we have present + present, is that Zero conditional?

If he ________ (eat) all that, he will be ill.

is this one a zero conditional? "If I have a burguer, I will get fat"

If I study hard, I _____ (pass) the English exam

what is the structure of the First conditional?