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Give the two reactions required in order to convert an alcohol into a hydroxynitrile. Include reactants and conditions. (6 marks)

Convert an alcohol into a ketone by heating it in reflux apparatus with potassium dichromate/K2

Answered by Annabelle B. Chemistry tutor
1850 Views

Describe Specific and Non-Specific defence mechanisms (6 marks)

The response in non-specific immunity is immediate and the same for all pathogens with two separate responses. The body has a physical bar...

Answered by Annabelle B. Biology tutor
3985 Views

Assess the statement that globalisation produces as many losers as it does winners 12 marks)

An important part of geography is understanding that processes are uneven for the different 'players' involved. This question is great to show off your knowledge of what globalisation is and how it has af...

Answered by Elizabeth J. Geography tutor
6010 Views

immunisations - describe two disadvantages of vaccinations ?

Although vaccinations are very beneficial they do carry risk factors - they can cause mild swelling, soreness, a mild form of the disease (they are being vaccinated for), and rare major harmful reactions....

Answered by Ameenah R. Biology tutor
2651 Views

Find current and voltage across resistors R1 and R2, when they connected in parallel and in series. A 12V battery is connected, R1=4Ω and R2=3Ω.

  1. First of all, we try to find a circuit where resistors are connected in parallel. When resistors are connected in parallel, the voltage across each resistor is exactly the same, V1 = V2 = 12 V. On t...
Answered by Egle A. Physics tutor
29682 Views

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