Question

What is the colour of a freshly cut piece of zinc? Why does zinc react with dilute sulphuric acid to liberate hydrogen gas?

Answer 1

HEY!!

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✔Zinc is silvery grey metal

✔Zinc is more electropositive than H + ions present in the sulphuric acid.

✔When it comes in contact with H + ions in donates electrons, which are accepted by H + ions to form H atoms.

✔H ions combine to form hydrogen gas.

Answer 2

zinc is green when freshly cut because oxygen reacts with it and it gets oxidised.
Zinc is a metal while dilute sulphuric acid is an acid. we know that
a metal reacts with acid to produce salt and hydrogen gas. So zinc reacts with dilute sulphuric acid to produce metal salt of zinc that is zinc sulphate and hydrogen gas.