←Predicting and identifying reactions and products
From Paper 4, Higher
Explain why transition metal compounds are used as catalysts and give an example.
From Paper 4, Higher
Describe how to test for carbonate ions.
From Paper 4, Higher
A metal salt gives a blue precipitate with sodium hydroxide and a white precipitate with acidified barium chloride. Identify the salt and explain.
From Paper 4, Higher
Explain why the reactivity of Group 1 metals increases down the group.
From Paper 4, Higher
In paper chromatography, a spot moved 3.6 cm and the solvent moved 8.0 cm. Calculate the Rf value and explain how it could identify the substance.
From Paper 4, Higher
Describe what you would see when potassium is added to water and write a balanced equation.
From Paper 4, Higher
In paper chromatography, a spot moved 2.1 cm and the solvent moved 7.0 cm. Calculate the Rf value and explain how it could identify the substance.
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This paper is written by Plasmo in the style of the OCR GCSE Chemistry exam. It is not a past paper and is not produced or endorsed by the exam board.