Question

Which statement is true about the activity series? (5 points)

Answer 1

Answer:

Which statement is true about the activity series?

Elements are listed according to their reactivity. This allows you, in a displacement reaction, to deduce if a reaction is going to take place accordingly to the reactivity of the reactants.

Which of the following statements is true about nuclear fusion?

It occurs in the sun. In fusion, nuclei of lighter atoms are combined to make a heavy nucleus, and it release a large amount of energy.

Which of the above reactions is an example of a combustion and also a synthesis reaction?

1 C3H8 + 5O2 → 3CO2 + 4H2O

Here a fuel (propane, C3H8) reacts with O2 to produce heat, carbon dioxide and water. And those are the characteristics of a combustion reaction.

Answer 2

Answer: Correct statements are given below:

1) In activity series elements are listed according to their reactivity.

2) Nuclear reaction in which low atomic nuclei fuse to form a heavier nucleus with the release of energy. Nuclear fusion reaction occurs in the sun.

3) C3H8 + 5O2 → 3CO2 + 4H2O is the example of a combustion reaction.

4) 2Fe + O2 → 2FeO is the example of synthesis reaction. In synthesis reaction is a type of reaction in which two reactants combine to form a single product.