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Reactions Of Acids With Metals (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'Reactions Of Acids With Metals' from the broader topic Chemical Changes. The test is geared towards the AQA exam board style syllabus.
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If 0.50 g of zinc (Ar = 65.4) reacts completely with excess hydrochloric acid, how many moles of hydrogen are produced? Zn + 2HCl ? ZnCl2 + H2
When a metal reacts with an acid, what are the usual products?
Which observation shows hydrogen gas is present?
Which observational test distinguishes between hydrogen and oxygen produced from different reactions?
Which metal from the list would NOT react with dilute hydrochloric acid under normal conditions?
Why is it important to filter out excess unreacted metal before evaporating a salt solution made from metal + acid?
What is the main hazard when collecting hydrogen gas from a metal + acid reaction in the lab?
Why does a more reactive metal react faster with dilute acid than a less reactive metal?
If 1.50 g of magnesium (Ar = 24.3) reacts completely with excess hydrochloric acid, what is the maximum mass of hydrogen gas produced? (2Mg + 2HCl ? 2MgCl2 + H2)
Which product must be removed or kept away to prevent recombination when collecting hydrogen from a metal + acid reaction?
What is observed when zinc powder is added to hydrochloric acid?