Chemistry · Oct / Nov 2021 · Paper 62 · Question 3
0620
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Solid O and liquid P were analysed. Solid O was ammonium bromide. Tests were done on each substance. tests on solid O Complete the expected observations. Solid O was dissolved in water to form solution O. Solution O was divided into four approximately equal portions in four test-tubes.i 3
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3(a)[1]
no change / colourless / no reaction / no observation
3(b)(i)[1]
(red litmus) becomes blue
3(b)(ii)[1]
ammonia / NH3
3(c)[1]
cream precipitate
3(d)[1]
(solution becomes) orange / yellow
3(e)[2]
any two from:
flammable / fuel
unsaturated / alkene / any named alkene
organic / contains carbon / hydrocarbon
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