Which of the following provides evidence that a chemical change has taken place?

a). The original substance can be recovered by physical processes

b). A gas is formed when tow liquids are mixed

c). Some pieces of substances get smaller or disappear

d). One substance dissolves in another

Question

Chemistry

Josue

6 February, 21:34

Which of the following provides evidence that a chemical change has taken place?

a). The original substance can be recovered by physical processes

b). A gas is formed when tow liquids are mixed

c). Some pieces of substances get smaller or disappear

d). One substance dissolves in another

+5

Answers (1)

Know the Answer?

Christina Munoz · Answer 1

Answer : Option B) A gas is formed when two liquids are mixed.

Explanation : In this example a gas is forming as a result of mixing two liquids, so, changing of state can be clearly noticed, also there is a new substance which is produced and the reaction is also irreversible (i. e. it cannot be easily recovered to the starting reactants by any physical process). Hence, Option B is correct answer.

Which of the following provides evidence that a chemical change has taken place?a). The original substance can be recovered by physical processesb). A gas is formed when tow liquids are mixedc). Some pieces of substances get smaller or disappeard). One substance dissolves in another

Which of the following provides evidence that a chemical change has taken place?

a). The original substance can be recovered by physical processes

b). A gas is formed when tow liquids are mixed

c). Some pieces of substances get smaller or disappear

d). One substance dissolves in another