Disproportionation is the simultaneous oxidation and reduction of the same species in areaction.In which of the following chemical equations does disproportionation occur?1 Fe + CuCl2 → FeCl2 + Cu2 Cu…

Dolly the sheep was born in 1996. She was unusual because she had no biological father. Sheep have a diploid number of 54 chromosomes in their body cells. The diagram…

In triangle PRS, line QT is parallel to side RS.RS = 1.5 cmTS = 1.8 cmQT = 0.3 cmWhat is the length of PS? Answer: 12) F To solve this…

A piece of magnesium ribbon is dropped into a beaker of dilute aqueous hydrochloric acid at room temperature. After a while the production of bubbles of gas slows down. Which…

The diagram shows four experiments used to investigate movement of substances across dialysis tubing. This tubing is a partially permeable membrane which allows both glucose and water to pass through…

In a group of 20 patients at a medical centre, 5 suffered from migraines. Two patients from the group of 20 were picked at random for a survey on the…

A puddle is left on a road after a rain shower. The water in the puddle slowly disappears by evaporation. Three statements about the effect of changing different conditions on…