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Laboratory Oven for Drying Samples

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Questions and Answers

What is the purpose of a desiccator in a laboratory setting?

To isolate samples from the atmosphere (correct)
To cool samples to room temperature
To evaporate chemicals or solutions
To circulate heated air for drying

When should fume hoods be used in a laboratory?

When cooling samples in a muffle furnace
When evaporating perchloric acid (correct)
When drying samples at high temperatures
When storing samples in a desiccator

What is the function of a muffle furnace in a laboratory?

Achieving high temperatures for drying (correct)
Storing samples using a drying agent
Evaporating chemicals or solutions
Cooling samples to room temperature

Which type of laboratory oven allows for the oven to be evacuated?

Microwave oven (C) Signup and view all the answers

What is the purpose of a drying agent in a desiccator?

To absorb moisture from the atmosphere (D) Signup and view all the answers

Why should care be taken when performing trace metal analysis in a laboratory?

To prevent contamination of samples (C) Signup and view all the answers

What is the main purpose of a laminar-flow hood or workstation in a laboratory?

To create a positive pressure and prevent unfiltered air from flowing in (C) Signup and view all the answers

What is the role of wash bottles in an analytical laboratory?

To wash precipitates and transfer solutions quantitatively (B) Signup and view all the answers

What is the purpose of biohazard hoods in analytical laboratories?

To provide a safe workspace for handling infectious material (C) Signup and view all the answers

Why are vertical laminar-flow stations preferred when fumes are generated in a laboratory?

To prevent fumes from being blown over the operator (D) Signup and view all the answers

Which laboratory material is primarily used to heat, melt, and burn substances?

Porcelain crucible (D) Signup and view all the answers

What is the primary function of high-efficiency particulate air (HEPA) filters in a laminar-flow hood?

To remove particles larger than 0.3 μm from the air (D) Signup and view all the answers

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