Question 29
Original source text (the exact panel preserves diagram labels, tables and choices):
A flask containing liquid R is heated on a hotplate.
Which of the following statements is/are CORRECT?
(i) Evaporation of R occurs throughout the liquid.
(ii) The temperature of R remains constant during the boiling of R.
(iii) Heat energy is absorbed during the evaporation of R.
(iv) Bubbles of air are seen rising to the surface when R is boiling.
(v) Evaporation of R can occur before the hotplate is turned on.
A. (ii) only
B. (i) and (iv) only
C. (ii), (iii) and (v) only
D. (iii), (iv) and (v) only
A flask containing liquid R is heated on a hotplate.
Which of the following statements is/are CORRECT?
(i) Evaporation of R occurs throughout the liquid.
(ii) The temperature of R remains constant during the boiling of R.
(iii) Heat energy is absorbed during the evaporation of R.
(iv) Bubbles of air are seen rising to the surface when R is boiling.
(v) Evaporation of R can occur before the hotplate is turned on.
A. (ii) only
B. (i) and (iv) only
C. (ii), (iii) and (v) only
D. (iii), (iv) and (v) only