Practice Quiz

MCAS Chemistry Exam Practice - Question List

Select how would you like to study

Study Mode Free Daily Question Test Mode
11. Which of the following observed properties is most reliable in classifying a substance as a metal?
  1. good conductor of heat
  2. low melting temperature
  3. unreactive with other elements
  4. crumbles when hit by a hammer
See answer
12. Which of the following are most directly involved in chemical bonding?
  1. protons
  2. neutrons
  3. alpha particles
  4. valence electrons
See answer
13. Which of the following statements describes an exothermic reaction but not an endothermic reaction?
  1. Energy is destroyed during the reaction.
  2. Energy is used to form chemical bonds.
  3. Energy is used to break chemical bonds.
  4. Energy is released as heat during the reaction.
See answer
14. Which of the following statements explains why oxygen is classified asa pure substance and air is classifiedas a mixture?
  1. Oxygen is more reactive than air.
  2. Oxygen has a higher density than air.
  3. Oxygen undergoes phase changes, whereas air is always a gas.
  4. Oxygen contains only one substance, but air contains several substances.
See answer
15. The pH of milk is 6.4. Based on this information, which of the following statements best describes milk?
  1. It is very basic.
  2. It is very acidic.
  3. It is slightly basic.
  4. It is slightly acidic.
See answer

Select how would you like to study

Study Mode Free Daily Question Test Mode