Question

1. Which of the following statements is NOT true about double-replacement reactions?

a. The product may precipitate from solution.
b. The product may be a gas.
c. The product may be a molecular compound.
d. The reactant may be a solid metal.

2. The complete combustion of which of the following substances produces carbon dioxide and water?

a. C8H18
b. K2CO3
c. CaHCO3
d. NO

3. The equation Mg(s) + 2HCl(aq) + H2(g) is an example of which type of reaction?

a. combination reaction
b. single-replacement reaction
c. decomposition reaction
d. double-replacement reaction

Answer 1

The first one is going to likely be A because this is what happens in a precipitation reaction, not in a double replacement reaction. The second one is A because that is Methane, which is a source of fuel. The complete combustion formula is Oxygen + fuel, resulting in CO2 and H2O. The final one is a single-replacement reaction. Hope this helps!

Answer 2

The reactant may be a solid metal is not true about double-replacement reactions

( Option D )

What is double-replacement reactions?

This is a type of reaction is a reaction in which the positive and negative ions of two different ionic compounds exchange their ions in order to form two new compounds. A precipitate is usually formed in this type of reaction

What are chemical reactions?

These are reactions in which substances known as reactants combine together to form other new substances known as the products

There are different types of chemical reactions such as:

• Combination reactions
• Redox reactions
• Double decomposition reaction
• Thermal dissociation reaction
• Duble-replacement reactions and many more

Learn more about chemical reactions:

https://brainly.com/question/11231920?source=archive