Question 24

Question

Question 24
Substances are classified as acidic, basic, or neutral. The pH scale can be used to classify a substance. Which feature suggests that a substance is basic?

a
The pH is greater than 7.
 b
The pH is 7.
 c
The pH is 0.
 d
The pH is less than 7.
Question 25
What happens to the pressure of a gas when the temperature is increased?

a
the kinetic energy decreases so the pressure increases
 b
the kinetic energy increases so the pressure increases
 c
the kinetic energy increases so the pressure decreases
 d
the kinetic energy decreases so the pressure decreases
Question 26
Which phase change is represented when a puddle of water disappears?

a
solid to liquid
 b
liquid to gas
 c
gas to liquid
 d
liquid to solid
Question 27
A student was assigned to take water samples from a lake near his home. He measured the pH of one of the water samples to be 6.0. Which of the following best describes this sample of water?

a
slightly acidic
 b
highly basic
 c
slightly basic
 d
highly acidic
 e
neutral
Question 28
What is a solvent?

a
The material that is dissolved
 b
The material that increases the speed of the dissolution
 c
The material that reduces how much can be dissolved
 d
The material that is dissolving another material
Question 29
What trend on the Periodic Table is a measure of how strongly atoms attract bonding electrons to themselves?

a
density
 b
electronegativity
 c
ionization energy
 d
atomic radius
Question 30
A student is making a salt water solution for a lab experiment. Which of the following would increase in the rate the salt dissolves?

a
cooling the water
 b
using salt cubes instead of crushed salt
 c
stirring the solution

GPT-4o mini · Answer

Here are the answers to the questions you provided:

Question 24
Which feature suggests that a substance is basic?
Answer: a The pH is greater than 7.

Question 25
What happens to the pressure of a gas when the temperature is increased?
Answer: b The kinetic energy increases so the pressure increases.

Question 26
Which phase change is represented when a puddle of water disappears?
Answer: b Liquid to gas.

Question 27
A student measured the pH of a water sample to be 6.0. Which of the following best describes this sample of water?
Answer: a Slightly acidic.

Question 28
What is a solvent?
Answer: d The material that is dissolving another material.

Question 29
What trend on the Periodic Table is a measure of how strongly atoms attract bonding electrons to themselves?
Answer: b Electronegativity.

Question 30
Which of the following would increase the rate the salt dissolves?
Answer: c Stirring the solution.

Feel free to ask if you have any more questions!