In Foundation tier papers, there are some questions where you are provided with a series of boxes, and asked to link them correctly. In other questions, a number of key words are provided and you are asked to select appropriate words to fill in a box, or to complete a sentence.
In both cases, some of the options given are incorrect - examiners call these 'distractors' - and you should avoid selecting these.
For box-linking questions, it is important that you use clear straight lines to link the boxes.
Remember that not all boxes will link together. It is also very unusual in this type of question for a single box to end up with more than one line linking to it.
For key word selection, one strategy for solving them is to think about the right word to complete the blank in the question before looking at the available words. You can then look at the words given and hopefully find the word you were thinking of. If your word is not there, then find a word in the box that means the same thing, and use this for your answer. Make sure you only use words from the choices given to you.
Questions courtesy of Eduqas.
Zinc reacts with dilute hydrochloric acid to produce hydrogen gas.
Granules of zinc are reacted with hydrochloric acid and a small amount of copper(II) sulfate is added as a catalyst for the reaction.
Choose statements from the list below to complete the following sentences.
a) Using zinc powder instead of the larger pieces of zinc, the reaction takes ______. [1 mark]
b) When the experiment is repeated without the copper(II) sulfate catalyst the reaction takes ______. [1 mark]
a) Using zinc powder instead of the larger pieces of zinc, the reaction takes less time .
b) When the experiment is repeated without the copper(II) sulfate catalyst the reaction takes more time .
The temperature range in which enzyme activity occurs can be different for different enzymes. The graph below shows the amount of activity of an enzyme, A, over a temperature range.
Use the graph to choose temperatures showing the range where the enzyme activity is increasing:
______°C to ______°C [1 mark]
From -5°C to 40°C .