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A-level Chemistry Year 1
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Solution X reacts with copper carbonate solid to give effervescence.
Which of the following could be the identity of X(aq)?
A sample of X(aq) was added to potassium hydroxide solution and warmed, the gas produced turned red litmus paper blue.
Which of the following could be the identity of X(aq)?
The electron configuration of element X is: 1s22s22p4
What is the formula of a compound formed when calcium reacts with element X?
X is a particle with 18 electrons and 20 neutrons. Which of the following particles could be X?
1: 38Ar
2: 40Ca2+
3: 39K+