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Describe two different test tube reactions to identify the following organic compounds: propanal and benzoic acid.

There are several different answers one could make and an exam question would just require one for each. 1) Propanal - from the ending "al" this is an aldehyde. - Add Tollens' reagent. Positive res...
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Answered by Daniel D. • Chemistry tutor
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Solve the simultaneous equations y = 2x-3 and x^2 +y^2 = 2

Let the first equation be equation 1 and the second equation be equation 2. Firstly, you must substitute equation 1 into equation 2. This is because there are currently two unknown values in each equation (x...
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Answered by Daniel D. • Maths tutor
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How does blood return from the feet back to the heart?

First, some general advice: It is not uncommon for medical interviews, particularly at Oxbridge, to test the interviewee's ability to think laterally, creatively or "outside of the box." When prese...
AV
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What is the Jussive subjunctive?

The Jussive subjunctive expresses a command. It is usually in the 3rd person in a main clause and translated as "let him/her/them ..." e.g. amet! (= let him love)
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Answered by Matilda W. • Latin tutor
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What are the typical recurring themes in Shakespeare's plays?

There are many different themes running through each individual Shakespeare play but here are some of the most common and most recognisable and you can apply at least a couple to whichever Shakespeare play y...
KA
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