Q: Which of the following is a real-world example of a combustion reaction?

Burning of methane gas in a stove: $$CH_4(g) + 2O_2(g$$) \rightarrow $$CO_2(g) + 2H_2O(g$$) + \text{energy}$$

Question 1

Which of the following best describes a synthesis (combination) reaction?

Accepted Answer

Two or more reactants combine to form a single product.

Question 2

Given the reaction $$2HgO(s) \rightarrow 2Hg(l) + O_2$(g)$$, what type of chemical reaction is this?

Accepted Answer

Decomposition

Question 3

Which of the following is a real-world example of a combustion reaction?

Accepted Answer

Burning of methane gas in a stove: $$CH_4(g) + 2O_2(g$$) ightarrow $$CO_2(g) + 2H_2O(g$$) + 	ext{energy}$$

Question 4

What is the correct balanced equation for the reaction between zinc and hydrochloric acid, and what type of reaction is it?

Accepted Answer

$$Zn(s) + 2HCl(aq) \rightarrow $$ZnCl_2$$(aq) + H_2$(g)$$; Single Displacement

Question 5

Which of the following reactions is a double displacement reaction?

Accepted Answer

$$AgNO_3(aq) + $$NaCl(aq) \rightarrow AgCl(s) + $$NaNO_3(aq$$)$$

Question 6

A student mixes sodium hydroxide and hydrochloric acid in a beaker. Which type of reaction occurs and what are the products?

Accepted Answer

Double displacement; $$NaCl(aq)$$ and $$H_2O(l)$$

Question 7

Which of the following equations represents a decomposition reaction?

Accepted Answer

$$2KClO_3(s) \rightarrow 2KCl(s) + 3O_2(g)$$

Question 8

Which of the following best explains the importance of recognizing patterns in chemical reactions?

Accepted Answer

It helps classify concepts for easier understanding and prediction of chemical behavior.

Question 9

In the reaction $$N_2(g) + 3H_2(g$$) \rightarrow 2NH_3(g)$$, which type of chemical reaction is occurring?

Accepted Answer

Synthesis (Combination)

Question 10

A reaction occurs in which $$Fe(s) is $$added to $$CuSO_4(aq$$)$$, producing $$FeSO_4$$(aq)$$ and $$Cu(s). $$What type of reaction is this and what is the balanced equation?

Accepted Answer

Single displacement; $$Fe(s) + $$CuSO_4$$(aq) \rightarrow $$FeSO_4$$(aq) + Cu(s)$$

Question 11

Which of the following is NOT a characteristic of a combustion reaction?

Accepted Answer

It involves the exchange of ions between two compounds.

Question 12

Which reaction type is illustrated by the equation $$AgNO_3(aq) + $$NaCl(aq) \rightarrow AgCl(s) + $$NaNO_3(aq$$)$$?

Accepted Answer

Double Displacement

Question 13

A chemical reaction produces $$CO_2$$ and $$H_2O$$ from a hydrocarbon and oxygen. What type of reaction is this?

Accepted Answer

Combustion

Question 14

Which of the following equations is an example of a synthesis reaction?

Accepted Answer

$$2Mg(s) + O_2$(g) \rightarrow 2MgO(s)$$

Question 15

Which of the following best describes a single displacement reaction?

Accepted Answer

One element replaces another element in a compound.

Question 16

A student observes the reaction $$2KClO_3(s) \rightarrow 2KCl(s) + 3O_2(g) in a $$laboratory. What is the significance of this reaction in real-world applications?

Accepted Answer

It is used in the production of oxygen gas for medical and industrial purposes.

Question 17

Which of the following reactions is a real-life example of a double displacement reaction?

Accepted Answer

Mixing silver nitrate and sodium chloride to produce silver chloride and sodium nitrate.

Question 18

Which equation represents a reaction where two elements combine to form a single product?

Accepted Answer

$$2Mg(s) + O_2$(g) \rightarrow 2MgO(s)$$

Question 19

Which of the following is a key benefit of classifying chemical reactions into types?

Accepted Answer

It allows for faster learning and easier understanding of chemical processes.

Types of Chemical Reactions: Patterns and Classification

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