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Bunsen Burners

The Bunsen burner was named after Robert Bunsen. It is commonly used in science laboratories. This category contains questions relating to the Bunsen burner, its use and its history.

1,143 Questions

What type of glass is used over a Bunsen burner?

Borosilicate glass is commonly used over a Bunsen burner due to its high resistance to thermal shock. This type of glass can withstand high temperatures without cracking or shattering, making it ideal for laboratory settings.

Do closing air-holes on a Bunsen burner make the flame hotter?

Because more air is able to fuel the flame's reaction; the collar at the bottom of the tube is adjusted so more air can mix with the gas before combustion, the flame will burn hotter.

What is the symbol for a Bunsen burner?

it doesn't have a meaning, Robert Bunsen created it so it was thought to him to call his invintion a Bunsen burner!

Where does gas enter the Bunsen burner?

Gas enters the bottom of the Bunsen burner, where it travels up to mix with air before moving up the stem to meet the flame.

How do you heat a test tube with a Bunsen burner?

To heat a test tube with a Bunsen burner, adjust the air hole to provide a blue flame, and place the test tube at a 45-degree angle in the flame. Rotate the test tube slowly to ensure even heating. Remember to wear appropriate safety gear, such as goggles and heat-resistant gloves.

What is the evidence that indicates that only physical changes occur when a platinum wire is heated in a Bunsen burner flame?

The evidence that indicates only physical changes occur when a platinum wire is heated in a Bunsen burner flame includes the fact that the platinum wire does not combine with oxygen or any other element in the flame to form a new substance, and the wire retains its chemical properties after cooling down. The color change of the wire due to heating is a reversible physical change, and the wire can be restored to its original state without any alteration in its composition.

Where should a beaker be placed with respect to the flame for the most efficient heating on Bunsen burner?

The most efficient, and safe, place for a beaker to be heated is above the flame. Have the beaker held up by the proper metal stand and have it held so that the flame is grazing the bottom of the beaker. Be careful though, the flame should only graze the bottom of the beaker so that the chemical doesn't heat up too quickly.

When did Michael Faraday invent the Bunsen Burner?

Michael Faraday did not invent the Bunsen Burner. It was actually invented by German chemist Robert Wilhelm Bunsen in the 19th century. Bunsen invented the burner in 1855 as a more controlled and efficient way of producing a flame for chemical experiments.

How do you control the height of the flame on a bunsen burner?

The height of the flame on a Bunsen burner can be controlled by adjusting the gas supply using the gas tap. Turning the gas tap to increase the gas flow will raise the flame height, while decreasing the gas flow will lower the flame. Positioning the collar on the burner can also help control the air-to-gas ratio and influence the flame height.

How do you correct a yellow flame on a Bunsen burner?

To correct a yellow flame on a Bunsen burner, adjust the air intake by opening the air hole. This will allow more air to mix with the gas, creating a hotter and more efficient blue flame. If the flame is still yellow, check the gas supply and the burner head for any blockages or inadequate pressure.

Why it is necessary to hold the neck of the tubes in the flame of Bunsen burner?

Experience, or indeed a little foresight shows that holding it anywhere else will result in getting your fingers or tongs burnt in the flame. Usually the thing you are trying to heat is at the bottom of the tube and the neck is farthest away from that.

Why the Bunsen burner flame may sometimes blow itself out?

A Bunsen burner flame may blow itself out if the air/gas mixture is not adjusted correctly, leading to either too much or too little gas flow. Additionally, if the flame is positioned too close to an object or surface, it can disrupt the airflow and cause the flame to extinguish. It can also happen if there are strong drafts or air currents in the vicinity of the burner.

Function of a gas regulator in a Bunsen burner?

The gas regulator in a Bunsen burner controls the flow of gas from the gas source to the burner. It helps regulate the amount of gas being released, allowing for precise control of the flame size and temperature. This ensures safe and efficient operation of the Bunsen burner.

What can you use a Bunsen burner for?

A Bunsen burner can be used for heating, sterilizing, and combustion of chemicals in laboratories. It provides a controlled flame that can be adjusted for different types of experiments, such as heating liquids, melting solids, and performing chemical reactions.

When limestone is heated strongly with a Bunsen burner it breaks down and a gas is given off?

Heating limestone causes it to undergo thermal decomposition, releasing carbon dioxide gas. This process forms calcium oxide, also known as quicklime, as a residue.

Why is it better to use a blue flame on a Bunsen burner?

It is better to use a blue flame on a Bunsen burner because it indicates complete combustion of the gas, resulting in a hotter and more efficient flame for heating or sterilizing purposes. A blue flame also produces less soot and smoke compared to a yellow or orange flame.

What happens when you put iron wool in a Bunsen burner?

When iron wool is placed in a Bunsen burner flame, it undergoes a chemical reaction called oxidation. The iron in the wool combines with oxygen from the air to form iron oxide, which produces sparks and a glowing effect.

Where does the gas enter the Bunsen burner from?

The gas enters the Bunsen burner through a tube connected to a gas source, such as a gas line or a gas tank. The gas flows through the tube and into the burner where it mixes with air before being ignited.

Did Robert Bunsen make the Bunsen burner?

No, Robert Bunsen did not invent the Bunsen burner. It was actually invented by Michael Faraday in the 19th century. The Bunsen burner is named after Bunsen as he helped popularize its use in laboratories.

Word equation for the air hole on a Bunsen burner is closed?

When the air hole on a Bunsen burner is closed, it restricts the flow of air into the burner. This can result in incomplete combustion of the gas, leading to a yellow, sooty flame instead of a blue, clean flame. Adjusting the air hole allows for the correct air-to-fuel ratio, producing an efficient and clean flame for heating or sterilizing purposes.

One way to reduce risk when using bunsen burner?

Before lighting, place the Bunsen burner at least 12 inches in front of any overhead shelving or equipment and be mindful of loose hair or clothing, like your lab coat. Always keep safety equipment, like fire extinguishers and safety blankets, close at hand.

What happens when a beaker with cold water is held in a yellow burner flame?

If a beaker with cold water is held in a yellow burner flame, the water will begin to heat up as it absorbs the thermal energy from the flame. Eventually, the water will reach its boiling point and start to evaporate. It's important to note that the yellow flame indicates incomplete combustion, which can produce soot and carbon monoxide.

When the Bunsen burner is on but no experiment is being carried out why is it advisable to set it to the luminous flame?

So you don't burn yourself. If it's on and you're not paying attention to it, a luminous flame is easily glimpsed in your peripheral vision. If the flame was non-luminous, it's much harder to detect and causes a greater risk. the non-luminous flame also burns much hotter.

The teacher assigns you to light a Bunsen burner using the safest technique What sequence of events do you follow to complete the assignment?

  1. Ensure the Bunsen burner is connected to a gas source and that the airflow is set to the ideal level.
  2. Use a striker or lighter to ignite the burner while adjusting the gas flow to produce a clean blue flame.
  3. Once the flame is lit, take caution to prevent any accidents or burns, and always turn off the gas supply when finished.