CATHOLIC HIGH SCHOOL - ASKnLearn

1 Which of the following is likely to be a pure compound?A A blue solutionB Colourless crystals which melts at 58 o C.C Blue crystals which melt over a range (55-60) o CD An oily liquid give two fractions when distilled.2 The diagram below shows the fractional distillation of two liquids R and S. R hasa boiling point of 80 o C and S has a boiling point of 110 o C.Which statements about the experiment are correct?1 The vapour at point X contains more R than S.2 The liquid left in the flask contains more S than R.3 The temperature at point X is higher than the temperature at point Y.ABCD1, 2 and 3 correct1 and 2 correct2 and 3 correct1 onlyCatholic High School Preliminary Examination III Paper 1