Both are correct, in different contexts. Use "on" when referring to grounds or buildings, and "in" when referring to personal items like belongings. For example, They found oil on my propertyrefers to the land, while They found the evidence in his property means they were searching his personal affects.
"Not like that" can be grammatically correct, depending on the context.
Yes. It is grammatically sound.
The phrase "Is you don't miss me do you" is not grammatically correct. It should be rephrased to something like "Don't you miss me?" to be correct.
Yes! That is grammatically correct!
Yes, 'for free', is grammatically correct.
"That was wrong" is a grammatically correct sentence.
Yes, this is grammatically correct.
no it is not grammatically wrong but it is better to ask where are you if you want to use it in question...
Yes, it is grammatically correct.
Yes, Almighty God is grammatically correct.
'Rhoda's crazy' is grammatically correct.
"Off you go" is not grammatically incorrect.