Foundation January 2020 Paper 2 Q11

EdexcelCurrent spec6 marksProperties of Numbers

11 Here are five mathematical signs

\(+ \qquad \gt \qquad = \qquad \in \qquad \lt \)

(a) Write one of these five signs in each box so that each of these statements is true.
(i)
Three boxes: 4 °C, an empty box, 9 °C
(1)
(ii)
Three boxes: −3 °C, an empty box, −8 °C
(1)

The table gives information about the boiling points and the freezing points of some elements.

ElementChlorineMercuryNeonOxygen
Boiling point (°C)−35357−246−183
Freezing point (°C)−101−39−249−218
(b) Which of these elements has the lowest boiling point? (1)
(c) Which of these elements has the largest difference in temperature between its boiling point and its freezing point? (1)

Dr Strauss is going to cool chlorine from its boiling point to its freezing point.
He knows that it will take 2 minutes for the temperature of the chlorine to go down 10 °C.

(d) Work out how long it will take the chlorine to cool from its boiling point to its freezing point? (2)
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