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A student prepared a sample of soap in the school laboratory. The experiment was carried out in the four stages illustrated on the previous page
(2014)
An experiment to investigate the effect of temperature on the rate of the reaction between 0.05 M sodium thiosulfate solution and an excess of 3 M hydrochloric acid solution was carried out as follows.
What colour is observed in a flame test on a salt of (i) barium, (ii) lithium?
Name the scientist whose work on energy levels in the hydrogen atom is depicted in the Google doodle reproduced on the right
The fuel in camping gas cylinders, like the one pictured on the right, is a liquefied mixture of propane, butane, and another compound which is a structural isomer of butane
