RETEST- Safety and equipment

What items are considered essential safety gear in a chemistry lab?

• Goggles, lab coat, and beaker tongs

• Goggles, latex gloves, and a lab coat

• Safety glasses, rubber gloves, and a stirring rod

• Face shield, apron, and crucible

What is the primary function of an electronic balance in a chemistry lab?

• Heating chemicals to high temperatures

• Measuring the volume of liquids

• Measuring the mass of a substance

• Mixing different chemical solutions

What is the purpose of a ring stand and ring clamp in a laboratory setup?

• To crush and grind solid materials

• To support and hold laboratory glassware in place

• To measure the exact volume of a liquid

• To transfer small quantities of water

What is a distinctive feature of a conical flask (Erlenmeyer flask) that aids in mixing chemicals without spilling?

• Its flat bottom

• Its narrow neck

• Its wide base

• Its graduated markings

Which of the following pieces of equipment is specifically designed to measure a precise volume of liquid?

• Beaker

• Test tube

• Graduated cylinder

• Evaporating dish

What is a recommended safety practice for long hair in a lab?

• Tie it back to prevent interference or hazards.

• Let it hang freely for comfort.

• Cover it with a lab coat.

• Use hairspray to keep it in place.

What is the correct way to handle broken glassware in a lab?

• Pick up large pieces carefully with gloved hands.

• Sweep it up with a broom and dustpan and dispose of it in a designated broken glass container.

• Throw it in the regular trash bin.

• Leave it for the instructor to clean up.

What is strictly prohibited when working with chemicals in a lab?

• Tasting or smelling them directly.

• Diluting them with water.

• Storing them in labeled containers.

• Using them under a fume hood.

When heating a test tube, what is a crucial safety precaution to prevent injury?

• Point the test tube towards yourself to observe the reaction closely.

• Use bare hands to hold the test tube for better control.

• Ensure the test tube is pointed away from yourself and others.

• Heat the test tube rapidly to speed up the reaction.

What is the proper way to carry a microscope?

• Hold it by the eyepiece with one hand.

• Carry it with two hands, one under the base and one on the arm.

• Drag it across the lab bench to its new location.

• Carry it by the stage with one hand.