CHEM 101- Pretest

Which molecule is a dipole?

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Which is the weakest type of intermolecular force?

• Dipole-dipole

• H-bonding

• Ion-dipole

• London dispersion

These are forces that hold within a molecule.

• intramolecular forces

• intermolecular forces

• ion-dipole interaction

• dipole-dipole interaction

What happens to the rate of reaction when 5% HCl is used instead of 15% HCl to react to Calcium Carbonate (CaCO3)?

• It becomes faster.

• It becomes slower.

• It stays the same.

• No reaction will take place.

The substance that changes the rate of reaction but is neither changed nor consumed in the reaction.

• reactant

• product

• reagent

• catalyst

How many grams does 0.027 mol of copper weigh? (Molar mass Cu = 63.55 g/mol)

• 0.00042 g

• 1.8 g

• 1.7 g

• 2,400 g

If you calculate the maximum amount of product that could be obtained in a chemical reaction, you are calculating the ______________.

• actual yield

• theoretical yield

• percent yield

• experimental yield

Which of the following pairs show the most common bleaching agents?

• NaOCl & H20

• NaCl & H2O2

• NaOCl & H2O2

• NaOH & H2O

Foundation is used to give even and flawless look of the face. Which is NOT an ingredient in making foundations?

• talc

• moisturizer

• surfactant

• colorant

What is the reactant that is not totally consumed in the reaction?

• actual

• excess

• experimental

• limiting