Question 4Multiple ChoiceWhich one is the advantage of soft water?It makes our skin softMore soaps are wasted while washingGood for bones and teeth
Question 5Multiple ChoiceSoluble solids can be separated from a solution by........Hand picking Separating funnelEvaporation
Question 8Multiple ChoiceWhich one best explains about physical change?It is irreversible changeNo new substance are formedWe cannot get back it's original identity
Question 9Multiple ChoiceWhich minerals are present in hard water?Magnesium and calcium Sodium ionsLime
Question 10Multiple ChoiceWhat is molecular formula for the compound X if it has 3 atoms of A, 2 atoms of B and 6 atoms of C?A6B2C3A3B2C6A2B6C3