WorksheetsBunsen Burners: Controllable Fire
Total questions: 16
Worksheet time: 8mins
What is the primary use of a Bunsen burner in a laboratory?
Measuring liquids
Heating, sterilization, and combustion
Mixing chemicals
Storing samples
Who invented the Bunsen burner and in what year?
Robert Bunsen in 1855
Michael Faraday in 1845
John Dalton in 1860
Marie Curie in 1895
How does a Bunsen burner produce a hotter and cleaner flame?
By mixing gas and air before combustion, allowing for complete combustion and a hotter, cleaner flame.
By using only gas without any air, resulting in a cooler flame.
By burning air alone without any gas, producing a sooty flame.
By increasing the size of the flame without adjusting the air supply.
What color is the hottest flame produced by a Bunsen burner, and what temperature can it reach?
Blue; about 1,500 degrees Celsius (2,732 degrees Fahrenheit)
Yellow; about 1,000 degrees Celsius (1,832 degrees Fahrenheit)
Red; about 800 degrees Celsius (1,472 degrees Fahrenheit)
Green; about 1,200 degrees Celsius (2,192 degrees Fahrenheit)
The safety flame of a Bunsen burner is cooler and yellow in color.
True
False
Approximately what percentage of chemistry labs in schools use Bunsen burners as a primary heat source?
90%
30%
60%
10%
Which of the following is NOT a safety precaution when using a Bunsen burner?
A) Tie back long hair
B) Wear safety goggles
C) Light the burner with a match held above the flame
D) Keep flammable materials away from the flame
What scientific discoveries did Robert Bunsen make using the Bunsen burner?
The discovery of cesium and rubidium by studying emission spectra of heated elements.
The invention of the periodic table of elements.
The discovery of X-rays.
The development of the theory of relativity.
In microbiology labs, what is the main purpose of using a Bunsen burner?
Sterilization by killing bacteria and other microorganisms on metal tools like inoculating loops.
Heating chemicals to increase reaction rates.
Providing light for microscopic observation.
Measuring the temperature of samples.
What important antidote did Bunsen publish before his work on the Bunsen burner, according to the Fun Fact box?
The antidote to arsenic poisoning.
The antidote to mercury poisoning.
The antidote to cyanide poisoning.
The antidote to lead poisoning.
Fill in the gap - The Bunsen burner was invented by ______ Bunsen in 1855, a German chemist who needed a reliable heat source for his experiments. At that time, laboratory ______ were inefficient and produced a lot of _____. Bunsen collaborated with his laboratory assistant, Peter ______, to design a burner that mixed gas and air before combustion, resulting in a hotter and cleaner flame.
Robert, burners, soot, Desaga.
Albert, heaters, smoke, Braun.
Friedrich, stoves, ash, Müller.
Wilhelm, lamps, dust, Schmidt.
The blue flame of a Bunsen burner is cooler than the yellow flame because it uses less gas.
True
False
Opening the air hole (collar or air regulator) on a Bunsen burner affects the flame's temperature and color in which of the following ways?
It increases the temperature and changes the flame from yellow to blue.
It decreases the temperature and changes the flame from blue to yellow.
It increases the temperature and changes the flame from blue to yellow.
It decreases the temperature and changes the flame from yellow to blue.
The Bunsen burner remains a popular tool in laboratories despite the availability of modern heating devices like electric heaters and infrared devices because:
it provides a direct, adjustable flame for precise heating needs.
it is safer than all modern heating devices.
it is more expensive and complex to use.
it cannot be replaced by any other device.
Safety precautions that should be taken when using a Bunsen burner in the laboratory include:
Tying back long hair and securing loose clothing
Leaving the burner unattended while lit
Pointing the open flame towards yourself or others
Using flammable liquids near the flame
The Bunsen burner remains a popular tool in laboratories despite the availability of modern heating devices like electric heaters and infrared devices because:
it provides a direct, adjustable flame for precise heating needs.
it is safer than all modern heating devices.
it is more expensive and complex to use.
it cannot be used for chemical experiments.
