Properties of Matter and Compounds - Test Test

Question 1

Which reason best explains why metals are shiny?

Revolt · Accepted Answer

C: because their valence electrons reflect light

Question 2

Which process is a chemical change?

Revolt · Accepted Answer

D: burning a match

Question 3

When applied to a dish, soap makes grease soluble in water. Which explanation correctly supports the role of intermolecular forces in this common observation?

Revolt · Accepted Answer

A: The nonpolar end of a soap molecule attaches itself to grease.

Question 4

A substance is tested in a lab. It is found to maintain a unique shape and is a good conductor of electricity. If it is made up of electrons, protons, and neutrons, what state of matter is this substance most likely to be?

Revolt · Accepted Answer

C: solid

Question 5

Malia was able to make a paperclip float on the surface of water. What will most likely happen to the paperclip if a drop of dishwashing detergent is added near it?

Revolt · Accepted Answer

A: Soap is a surfactant that disrupts the intermolecular forces of water making the paperclip sink.

Question 6

Which is the Lewis structure for cap h sub 3 PO sub 4 ?

Revolt · Accepted Answer

D: Image with description A chemical structure diagram shows a central phosphorus (P) atom. Above the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it, and is single-bonded to a hydrogen (H) atom to its left and another hydrogen (H) atom to its right. To the left of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it. To the right of the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots above it and two dots below it. Below the P atom, a single bond connects to an oxygen (O) atom. This oxygen atom has two dots to its left and two dots to its right, and is single-bonded to a hydrogen (H) atom below it.

Question 7

Which statement is true about ionic compounds?

Revolt · Accepted Answer

B: Ionic compounds have varying solubilities in water.

Question 8

Which is the best example of immiscible liquids?

Revolt · Accepted Answer

D: a polar liquid and a nonpolar liquid that do not dissolve into one another

Question 9

Bromine gas in a container is heated over a flame. What happens to the average kinetic energy of the bromine particles?

Revolt · Accepted Answer

B: It increases quickly.

Question 10

The angle between the hydrogen atoms in water open paren cap h sub 2 cap o close paren is slightly less than expected for a tetrahedral shape. This is because of the

Revolt · Accepted Answer

B: extra electron repulsion from the lone pairs.

Properties of Matter and Compounds - Test Test Answers

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