Question 1:
Which type of reaction involves the exchange of ions between two compounds?
Explanation: The correct answer is C) Displacement reaction. A displacement reaction involves the exchange of ions between two compounds. One element displaces another element from its compound, resulting in the formation of a new compound.
Question 2:
What type of reaction is represented by the following equation: 2H2 + O2 → 2H2O?
Explanation: The correct answer is A) Combination reaction. The given equation represents a combination reaction, where two or more substances combine to form a single product. In this case, hydrogen gas and oxygen gas combine to form water.
Question 3:
Which type of reaction involves the breakdown of a single compound into two or more simpler substances?
Explanation: The correct answer is B) Decomposition reaction. A decomposition reaction involves the breakdown of a single compound into two or more simpler substances. It is the reverse of a combination reaction.
Question 4:
What type of reaction is represented by the following equation: 2NaCl + Pb(NO3)2 → 2NaNO3 + PbCl2?
Explanation: The correct answer is C) Displacement reaction. The given equation represents a displacement reaction, where the ions in the reactants exchange places to form new compounds. In this case, sodium chloride and lead nitrate react to form sodium nitrate and lead chloride.
Question 5:
What type of reaction involves a change in oxidation states of the reactants?
Explanation: The correct answer is D) Redox reaction. A redox (reduction-oxidation) reaction involves a change in the oxidation states of the reactants. It occurs when there is a transfer of electrons between species, resulting in a change in the oxidation number of one or more elements involved in the reaction.
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