Praxis 5005 Practice Test
Question 1 of 5.
Which of the following is an example of an acid-base neutralization reaction?
A. NaCl + H₂O→ Na + CI+H₂O
B. Hâ‚‚+Br2 HBr
C. 2 HCI+Mg MgCl2+Hâ‚‚
D. HCIO4 + NH4OH → NH4CIO₂H₂O
Explanation: An acid-base neutralization reaction is defined as a chemical process in which an acid reacts with a base to produce a salt and water. To identify the correct example, each option must be analyzed carefully. The equation NaCl + H2O Na + Cl + H2O simply shows the dissolution of salt in water, which is a physical process rather than a neutralization. The reaction H2 + Br2 - 2 HBr is a synthesis reaction forming hydrobromic acid, not an acid-base interaction. Similarly, 2 HCI + Mg MgCl2 + H2 represents a single displacement reaction where magnesium displaces hydrogen from hydrochloric acid. Only HCIO4 + NH4OH NH4CIO4 + H2O demonstrates an acid reacting with a base to yield a salt (ammonium perchlorate) and water. Thus, this option correctly represents an acid-base neutralization reaction.
Question 2 of 5.
The rotation of Earth around its axis is responsible for which of the following?
A. The force of gravity
B. The day and night cycle
C. The temperature differences between seasons
D. The movement of continents relative to one another
Explanation: Rotation day night. Gravity mass. Seasons tilt orbit. Continents drift. 24 hour cycle.
Question 3 of 5.
Which TIIREE of the following agricultural practices are most likely to have a negative impact on the environment?
A. Increasing the amount of fertilizer applied to a field to maximize crop yields
B. Providing a field with excessive amounts of water to maintain ground saturation
C. Applying nonselective herbicides to a field at the end of the growing season to eliminate weeds
D. Planting crops in a field with minimal disturbance of the surface soil to reduce soil erosion
Explanation: Fertilizer excess runoff pollution. Water excess waste salinization. Herbicides nonselective kill beneficial. No till positive. Negative practices harm. D positive conservation.
Question 4 of 5.
Which TWO of the following are powered most directly by the Sun's energy?
A. Surface currents in the ocean
B. Volcanic eruptions
C. Tectonic plate movements
D. Convection in the atmosphere
Explanation: Sun heats water winds currents convection. Volcanoes geothermal. Plates internal heat. Solar drive weather ocean.
Question 5 of 5.
Natural gas-fired power plants are considered greenhouse gas emitters because the burning of natural gas produces which of the following?
A. Hydrogen
B. Radon
C. Carbon dioxide
D. Helium
Explanation: Combustion CO2. Hydrogen fuel. Radon radioactive. Helium inert. Methane burn CO2.