Question

1. which of the following is true for a chemical reaction?
(a) a product gives a reactant.
(b) a reactant gives a product.
(c) atom do not rearrange themselves.
(d) there is no energy change.
2. hydrogen peroxide breaks up into water and oxygen. Manganese dioxide works in this reaction as a/an
(a) reactant
(b) product
(c) catalyst
(d) Energy releaser
3. which of the following gases is given out when iron reacts with dilute sulphuric acid?
(a) hydrogen (b) nitrogen (c) oxygen (d) carbon dioxide.


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Answer 1

Answer:

1) a

2) b

3) b

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