Lower
Melting points of molecular solids are lower than melting points of ionic compounds
Ur ans is option d
addition
Answer:
Error of parallax it usually occurs when the cylinder is above or below the eye level,and thus resulting in differences In reading the millimeters
If the results of the experiment on repeating are not same, it shows the results are not standard, there are some factors, which are not constant
Because it's protected from air because air makes it turn brown.
