Quiz about Chemistry Reactions

Question 1

How many atoms of aluminum are on each side of the following equation: 4Al + 3O₂--> 2Al₂O₃

Accepted Answer

4

Answer

2

Answer

6

Answer

1

Question 2

What is the part of the chemical equation in green called? Fe + S --> FeS

Accepted Answer

reactants

Answer

products

Answer

yield

Answer

chemical formula

Question 3

A reaction that gives off heat to its surroundings is...

Accepted Answer

exothermic

Answer

endothermic

Answer

endergonic

Answer

none of these

Question 4

Which type of reaction will feel cold?

Accepted Answer

endothermic

Answer

exothermic

Answer

exergonic

Answer

none of these

Question 5

Which coefficient must go in the missing spot to balance the chemical equation?

___Cu + O₂ --> 2Cu₂O

Accepted Answer

4

Answer

1

Answer

5

Answer

3

Question 6

What type of reaction is below?

CH₄ + O₂ --> CO₂ + H₂O

Accepted Answer

Combustion

Answer

Combination/Synthesis

Answer

Decomposition

Answer

Single Replacement

Answer

Double Replacement

Question 7

What type of reaction is below? Cu₂O + K --> K₂O + Cu

Accepted Answer

Single Replacement

Answer

Combination/Synthesis

Answer

Decomposition

Answer

Double Replacement

Answer

Combustion

Question 8

What type of reaction is below? H₂O --> H₂ + O₂

Accepted Answer

Decomposition

Answer

Combination/Synthesis

Answer

Single Replacement

Answer

Double Replacement

Question 9

Predict the products of this reaction: MgO + Li --> ?

Accepted Answer

Li₂O + Mg

Answer

LiO + Mg

Answer

MgO + Li

Answer

LiMg + O

Answer

MgLi + O

Question 10

Predict the products: C₂H₆ + O₂ --> ?

Accepted Answer

CO₂+ H₂O

Answer

H₂O + O₂

Answer

C + O2

Answer

CO₂ + H₂O₂

Answer

CH + O2

Question 11

Predict the products from the following reaction: KCl + Na₂SO₄

Accepted Answer

K₂SO₄ + NaCl

Answer

NaK + SO₄Cl

Answer

KaS + ClONa

Answer

KN + a

Question 12

Balance the following reaction: ___Na + ___O₂ --> ___Na₂O

Accepted Answer

4Na, O₂, 2Na₂O

Answer

4Na, 2O₂, 3Na₂O

Answer

2Na, 2O₂, 3Na₂O

Answer

1Na, O₂, 2Na₂O

Question 13

Which of the following is a characteristic of a combustion reaction?

Accepted Answer

A) It involves the reaction of a substance with oxygen.

Answer

B) It always produces carbon dioxide and water.

Answer

C) It requires a catalyst to proceed.

Answer

D) It is an endothermic process.

Question 14

In a chemical reaction, what is the role of a catalyst?

Accepted Answer

C) It speeds up the reaction without being consumed.

Answer

A) It increases the activation energy required for the reaction.

Answer

B) It is consumed in the reaction to form products.

Answer

D) It changes the equilibrium position of the reaction.

Question 15

What is the product of the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)?

Accepted Answer

A) Sodium chloride (NaCl) and water (H2O)

Answer

B) Hydrogen gas (H2) and sodium chloride (NaCl)

Answer

C) Sodium hydroxide (NaOH) and chlorine gas (Cl2)

Answer

D) Hydrochloric acid (HCl) and water (H2O)

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