Central Board Of Secondary Education [CBSE] — science exam

Respected sir,
I, being a. Student of class 10 wanted to inform you that we were told that the working of electric motors and generators have been omitted from our curriculum but it came in our exam due to which we were not able to answer the question. Also the question in which ph was mentioned as 14, but the salt was baking soda we got a bit confused though we know that answer only and not the first optional one, i attempted the first one incorrectly. I request you to give grace to those who have attempted that question, either of them. It would be highly appreciative if you will look into the matter of that question of electric motor also.