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Halogens AQA A-level Chemistry - Statistics
General Stats
- This quiz has been taken 74 times
- The average score is 7 of 38
Answer Stats
| Question | Answer | % Correct |
|---|---|---|
| which group are halogens | 7 | 42%
|
| what happens to reactivity as you go down the group | decreases | 42%
|
| what happens to electronegativity as you go down the group | decreases | 42%
|
| what is the oxidation state of oxygen | -2 | 40%
|
| what colour is the iodine gas produced from the reaction of iodide with sulfuric acid | purple | 34%
|
| define reduction | gain of electrons | 30%
|
| what is the oxidation states of hydrogen | +1 | 28%
|
| what is the oxidation state of sulfur in H2SO4 | 6 | 28%
|
| what are the silver halides then reacted with | ammonia | 28%
|
| what happens to boiling point as you go down the group | increases | 26%
|
| what is the colour of the precipitate formed when silver nitrate is added to chlodide | white | 26%
|
| what is the colour of the precipitate formed when silver nitrate is added to bromide | pale cream | 25%
|
| what colour is the bromine gas produced from the reaction of bromine with sulfuric acid | brown | 23%
|
| Give the half equation of bromide (from the reaction with sulfuric acid) | 2Br- > Br2 + 2e- | 21%
|
| why does the amount of chlorine in pools need to be controlled | it is toxic | 21%
|
| define oxidation | loss of electrons | 21%
|
| does silver iodide dissolve in ammonia | no | 21%
|
| what is the colourless (choking) gas produced when Iodide reacts with sulfuric acid | Sulfur dioxide | 21%
|
| will chlorine displace bromide from a molecule | yes | 21%
|
| what is the first test used for halide identification | silver nitrate test | 19%
|
| what is the bad egg smell gas produced when iodide reacts with sulfuric acid | H2S | 15%
|
| what is the chlorine reaction that happens in sunlight | 2Cl2 + 2H2O > 4HCl + O2 | 13%
|
| what is an oxidising agent | an atom which oxidises another atom | 13%
|
| does silver bromide dissolve in ammoia | only in concentrated ammonia | 13%
|
| what is produced when fluoride ions react with sulfuric acid | steamy fumes | 11%
|
| what is reducing power | the ability of an atom to reduce another atom | 11%
|
| what type of reaction forms steamy fumes when a halide reacts with sulfuric acid | acid-base | 9%
|
| what is the reaction of chlorine with sodium hydroxide | Cl2 + 2NaOH > NaClO + NaCl + H2O | 9%
|
| what is the colour of the precipitate formed when silver nitrate is added to fluoride | no precipitate | 9%
|
| what is the first electron affinity | the energy released when 1 mole of gaseous atoms each gain an electron, forming 1 mole of gaseous 1- ions | 9%
|
| why is chlorine put in swimming pools | to kill bacteria | 9%
|
| why acidify a solution before adding silver nitrate | to remove impurities | 9%
|
| What is the equation between sodium chloride and sulfuric acid | Nacl + H2SO4 > HCl + NaHSO4 | 8%
|
| what is the colour of the precipitate formed when silver nitrate is added to iodide | pale yellow | 8%
|
| what is the reversible reaction from chloric acid to hydrochloric acid | Cl2 + H2O > HClO + HCl | 4%
|
| what is formed when silver chloride reacts with ammonia | colourless solution | 4%
|
| what is disproportionation | when an atom is both oxidised and reduced at the same time | 4%
|
| what is the reversible equation for when solid sodium chlorate reacts with water | NaClO + H2O > Na+ + OH- + HClO | 2%
|
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