30 Questions
Which type of chemicals can cause damage to the surroundings by producing gas at high temperature and pressure?
Acetylides
What is the main trigger for explosive chemicals to undergo rapid chemical change?
Heat
Which classification of pictograms alerts users about the chemical hazards they may be exposed to?
Health Hazard Pictogram
What is the color of the background of a pictogram as required by the Hazard Communication Standard (HCS)?
Red
Which of the following is NOT an example of potentially explosive chemicals?
Organic solvents
What is the purpose of the pictograms on labels according to the Canadian Centre for Occupational Health and Safety?
To alert users of chemical hazards
Which type of acids can be corrosive at greater concentrations?
Strong acids
What is a characteristic of strong bases with a pH greater than 10?
They cause chemical burns
Which of the following is true about weak acids like acetic and citric acid?
They do not irritate the skin
What is a common characteristic of strong acids like hydrochloric and nitric acid?
They cause more pain than strong bases
Why do chemical burns from strong bases have more extensive damage than acid burns?
Strong bases react more vigorously with tissues
In what way has human exposure to hazardous chemicals been affected by economic development?
Increased human exposure due to higher use of chemicals in various sectors
Which of the following substances is NOT considered a pesticide?
Fertilizers
What are metabolites in relation to pesticides?
Materials that pesticides break down into
According to FAO (1989), what is the definition of a pesticide?
Substances intended for preventing, destroying, or controlling any pest
What do pesticides break down into under certain environmental conditions?
Metabolites
Which organization collaboratively defined the term pesticide with UNEP in 1990?
FAO
What category of substances are excluded from the term pesticide according to the text?
Fertilizers
What do welding shields primarily protect the eyes from?
Burns caused by infrared or intense radiant light
Why is it important for filter lenses to have an appropriate shade number according to OSHA?
To protect against harmful light radiation
What is the purpose of laser safety goggles?
Protect against intense concentrations of light produced by lasers
Why might an employer choose specific laser safety goggles according to OSHA guidelines?
Depending on the equipment and operating conditions in the workplace
What additional protection can face shields provide when used in combination with goggles or safety spectacles?
Protection against impact hazards
Why are each type of protective eyewear designed to protect against specific hazards?
To provide customized protection based on the work environment
How many significant figures are in the number 0.000048?
5
Which of the following numbers is correctly expressed in scientific notation?
$9.2 \times 10^{24}$
How many significant figures are in the number 56,783?
5
Which zero in the number 0.06034 is significant?
Zero between 6 and 3
In the number 812.90, why is the zero after the 2 considered significant?
It is to the right of a decimal point
What is the correct scientific notation for the number 73400000?
$7.34 \times 10^{7}$
Learn about common strong acids like hydrochloric, nitric, sulfuric, and phosphoric acids, as well as weak acids such as acetic, citric, and carbonic. Understand the difference between strong and weak bases and their effects on the skin and body.
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