How many atoms of sulfur are present in one molecule of sulfur?

Out of the $114$ elements discovered so far,how many elements do not behave as metals?

On which principle does the method of fractional distillation work?

Which one of the following properties is not generally exhibited by ionic compounds?

When finely powdered ore is placed on a rotating grooved table and rotated rapidly,the lighter impurities are removed. What is this method of concentration called?

$A$ solution of $CuSO_{4}$ was kept in an iron pot. After a few days,the iron pot was found to have a number of holes in it. Explain the reason in terms of reactivity. Write the equation of the reaction involved.