Laboratory Equipment Test - A

A clay triangle is a piece of laboratory equipment used to support a crucible or evaporating dish during heating. It is made of a wire frame with three clay-covered prongs that provide stability and prevent the crucible from tipping over. The clay covering helps to insulate the wire and protect it from the high temperatures used in the laboratory. This equipment is commonly used in chemistry experiments when heating substances or evaporating liquids.

A Bunsen burner is a type of equipment used to heat dry or chemicals in solution. It is commonly used in laboratories and has a gas inlet connected to a gas source. The gas is mixed with air and ignited to produce a flame that can be adjusted for different heating purposes. The Bunsen burner provides a controlled and consistent source of heat, making it suitable for various chemical reactions and experiments.

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The safety laboratory equipment observed in the image is a face shield. It is used to protect the face from splashes, flying particles, and chemical splatters. It provides full coverage and is typically made of clear plastic or polycarbonate material. The face shield is an important safety tool in laboratories to prevent injuries and ensure the safety of the user.

The laboratory equipment seen in the image is not called a ring stand.

The correct answer is Glass Funnel. A glass funnel is a piece of laboratory equipment used to channel liquids or fine-grained substances into containers with small openings. It has a wide, conical shape with a narrow stem, allowing for easy pouring and filtration. Glass funnels are commonly used in chemistry experiments and other scientific procedures.

The correct answer is Mortar and pestle. Mortar and pestle are commonly used in laboratories for grinding and crushing substances. They consist of a bowl-shaped mortar and a club-shaped pestle, which is used to grind and crush materials into a fine powder or paste. This equipment is often used in chemistry and biology labs for tasks such as grinding solid chemicals, crushing plant samples, or preparing solutions. The image likely shows a mortar and pestle, which is a recognizable and commonly used laboratory tool.

The hardware laboratory equipment referred to in the question is the crucible and cover. A crucible is a small ceramic or metal container used for heating substances at high temperatures. It is often used in chemistry experiments for heating, melting, or burning materials. The cover is used to prevent the escape of gases or materials during the heating process. Together, the crucible and cover are essential tools in a hardware laboratory for various heating and chemical reactions.

The correct answer is "Safety Goggles." These are a type of safety equipment designed to protect the eyes from hazards such as flying debris, chemicals, or intense light. They typically have a wraparound design with a snug fit to provide maximum coverage and prevent any particles or liquids from entering the eyes. Safety goggles are commonly used in various industries, laboratories, and construction sites to ensure the safety of workers.

The image shows an evaporating dish, which is a common laboratory equipment used for heating substances. It is a shallow, ceramic or glass dish with a wide opening, designed to hold small amounts of liquid or solid samples during evaporation. The dish allows for efficient heating and evaporation of the sample, making it a crucial tool in various scientific experiments and procedures.

The correct answer is Erlenmeyer Flask. The Erlenmeyer flask is a type of glassware commonly used in laboratories. It has a conical shape with a narrow neck and a wide base, which allows for easy mixing and swirling of liquids. The shape of the flask also helps to prevent splashes and spills during the mixing process. Erlenmeyer flasks are often used for titrations, heating liquids, and culturing microorganisms.

The laboratory equipment shown in the image is called a Triple Beam Balance. It is used to measure the mass of an object with high accuracy. The balance consists of three beams, each with a sliding weight that can be adjusted to find the balance point. By adding or subtracting weights from each beam, the total mass of the object can be determined. This equipment is commonly used in chemistry and physics experiments.

The statement is true because the question states that a centrifuge is shown in the image as a piece of laboratory equipment. Since the image is not provided, we have to assume that the image does indeed show a centrifuge. Therefore, the correct answer is true.

The image shown is of a wash bottle, which is a common laboratory equipment used for dispensing small amounts of liquid. It typically has a squeeze bottle design with a nozzle that allows for controlled dispensing of the liquid. The wash bottle is commonly used for rinsing glassware or delivering small amounts of water or other solvents to specific areas in the lab.

The laboratory equipment seen in the image is indeed a pipet bulb. A pipet bulb is a device used in laboratories to create suction and control the flow of liquid in a pipette. It is typically made of rubber or silicone and has a bulbous shape, allowing the user to squeeze it to create suction. The pipet bulb is an essential tool in many scientific experiments and procedures, making the statement "True" accurate.

The laboratory equipment shown in the image is not a volumetric pipet.

The correct answer is Florence Flask. The image shows a glass laboratory equipment commonly known as a Florence Flask. It has a round bottom and a long neck, which allows for easy mixing and swirling of liquids. The shape of the flask also helps in preventing the contents from splashing out during the mixing process.

The laboratory equipment shown in the image are rubber stoppers. They are used to seal containers such as test tubes, flasks, and other glassware in the laboratory to prevent the contents from spilling or evaporating.

Gas collecting tubes are marked in milliliters intervals and used to measure gas volumes. Milliliters is a commonly used unit of measurement for small volumes of liquids and gases. It is a subunit of a liter and is suitable for measuring the relatively small volumes of gas that would typically be collected in gas collecting tubes. Centiliters, hectoliters, and microliters are either too large or too small to be practical for this purpose. Therefore, milliliters is the most appropriate unit for marking the tubes and measuring gas volumes.

Beaker tongs are used to hold and transport beakers safely. They have a scissor-like design with rubber-coated jaws that provide a secure grip on the beaker. This allows for easy handling and movement of the beaker without the risk of dropping or spilling its contents. Beaker tongs are commonly used in laboratories to ensure the safe and efficient handling of beakers during experiments or other procedures.

A condenser is a piece of laboratory equipment used in distillation procedures. It is used to cool and condense vapors into liquid form. It consists of a glass tube with a water jacket surrounding it. As hot vapors pass through the condenser, they come into contact with the cool surface of the glass tube, causing them to condense back into liquid form. This allows for the separation and collection of different components in a mixture based on their boiling points.

A watch glass is a small, concave glass dish that can be used as a cover for a beaker to prevent evaporation or contamination of the contents. It can also be used for evaporating very small amounts of liquid by placing it on top of a container and heating the liquid, causing it to evaporate and collect on the underside of the watch glass. This makes it a versatile tool for various laboratory applications.

The image below shows a pair of tongs specifically designed for holding beakers. Beaker tongs are commonly used in laboratories to safely handle hot or cold beakers without the risk of spilling or breaking the glassware. They have a scissor-like design with rubber-coated jaws that provide a secure grip on the beaker. These tongs are essential equipment in a laboratory setting and are easily recognizable due to their specific design and purpose.

A micropipetor is a laboratory equipment used to deliver very small amounts of liquid. It is commonly used in scientific research and experiments where precise and accurate measurements of liquids are required. Micropipetors are designed to handle volumes ranging from microliters to milliliters and are equipped with a piston mechanism to aspirate and dispense liquid. They are widely used in various fields such as molecular biology, biochemistry, and analytical chemistry.

The image below shows a laboratory equipment known as a flint striker. A flint striker is used to create sparks by striking a piece of flint against a hard surface, such as steel or metal, in order to ignite a flame. This tool is commonly used in chemistry laboratories to light Bunsen burners or other gas-powered equipment.

A hot plate is a type of laboratory equipment used for heating substances. It consists of a flat surface that can be heated to high temperatures. The name "hot plate" accurately describes the function and appearance of this equipment. It is commonly used in chemistry and biology labs for tasks such as heating solutions, melting solids, or conducting experiments that require controlled temperature.

The pneumatic trough is not used under hot apparatus or glassware. It is actually used for collecting gases by displacement of water. The image shows a pneumatic trough with water in it, which is used to collect gases that are less dense than water. Therefore, the correct answer is False.

A magnetic stirrer is a common laboratory equipment used for mixing and stirring liquids. It consists of a magnetic bar that is placed inside the liquid and is rotated by a magnetic field generated by a motor underneath the plate. This allows for efficient and uniform mixing of the liquid without the need for manual stirring. The other options mentioned, such as hot plate, gas generator box, do not accurately describe the equipment shown in the image.

The image shows a variety of laboratory equipment including a ring stand, O - ring clamp, Bunsen burner, and Erlenmeyer flask. A ring stand is a metal stand with a rod that can hold various equipment such as clamps and supports. An O - ring clamp is a clamp that can hold objects securely in place. A Bunsen burner is a gas burner used for heating substances. An Erlenmeyer flask is a conical flask with a narrow neck, used for mixing and storing liquids.

The piece of laboratory equipment shown in the image is a clay triangle. It is used to support a crucible over a Bunsen burner flame during heating. The clay triangle is placed on a metal ring attached to a ring stand, and the crucible rests within the triangle. The heat from the Bunsen burner flame can then be directed underneath the crucible for controlled heating, often during experiments that require high temperatures such as when performing reactions in the crucible or heating substances to remove moisture.