Statistics for Halogens AQA A-level Chemistry

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General Stats

This quiz has been taken 52 times
The average score is 8 of 38

Answer Stats

Question	Answer	% Correct
what happens to reactivity as you go down the group	decreases	51%
what is the oxidation state of oxygen	-2	43%
which group are halogens	7	43%
what happens to electronegativity as you go down the group	decreases	41%
what is the oxidation states of hydrogen	+1	35%
define reduction	gain of electrons	35%
what is the oxidation state of sulfur in H2SO4	6	32%
what are the silver halides then reacted with	ammonia	32%
what happens to boiling point as you go down the group	increases	30%
what is the colour of the precipitate formed when silver nitrate is added to bromide	pale cream	30%
what colour is the iodine gas produced from the reaction of iodide with sulfuric acid	purple	30%
what is the colour of the precipitate formed when silver nitrate is added to chlodide	white	30%
why does the amount of chlorine in pools need to be controlled	it is toxic	27%
what is the colourless (choking) gas produced when Iodide reacts with sulfuric acid	Sulfur dioxide	27%
Give the half equation of bromide (from the reaction with sulfuric acid)	2Br- > Br2 + 2e-	24%
does silver iodide dissolve in ammonia	no	24%
what is the first test used for halide identification	silver nitrate test	24%
will chlorine displace bromide from a molecule	yes	24%
what colour is the bromine gas produced from the reaction of bromine with sulfuric acid	brown	22%
what is an oxidising agent	an atom which oxidises another atom	19%
what is the bad egg smell gas produced when iodide reacts with sulfuric acid	H2S	19%
define oxidation	loss of electrons	19%
what is the chlorine reaction that happens in sunlight	2Cl2 + 2H2O > 4HCl + O2	16%
does silver bromide dissolve in ammoia	only in concentrated ammonia	16%
what is reducing power	the ability of an atom to reduce another atom	16%
what type of reaction forms steamy fumes when a halide reacts with sulfuric acid	acid-base	14%
what is the reaction of chlorine with sodium hydroxide	Cl2 + 2NaOH > NaClO + NaCl + H2O	14%
what is the colour of the precipitate formed when silver nitrate is added to fluoride	no precipitate	14%
what is produced when fluoride ions react with sulfuric acid	steamy fumes	14%
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	14%
why is chlorine put in swimming pools	to kill bacteria	14%
why acidify a solution before adding silver nitrate	to remove impurities	14%
What is the equation between sodium chloride and sulfuric acid	Nacl + H2SO4 > HCl + NaHSO4	11%
what is the colour of the precipitate formed when silver nitrate is added to iodide	pale yellow	11%
what is the reversible reaction from chloric acid to hydrochloric acid	Cl2 + H2O > HClO + HCl	5%
what is formed when silver chloride reacts with ammonia	colourless solution	5%
what is disproportionation	when an atom is both oxidised and reduced at the same time	5%
what is the reversible equation for when solid sodium chlorate reacts with water	NaClO + H2O > Na+ + OH- + HClO	3%