Experimental Design and Techniques Quiz

Which piece of apparatus is most suitable for measuring the time of a reaction?

• Balance

• Burette

• Stopwatch

• Thermometer

Answer explanation

A stopwatch is specifically designed to measure time intervals, making it the most suitable apparatus for timing a reaction. The other options, like balance and burette, serve different purposes in experiments.

What is the most appropriate apparatus to measure 25.0 cm³ of a solution accurately?

• Measuring cylinder

• Beaker

• Volumetric pipette

• Gas syringe

Answer explanation

A volumetric pipette is designed for accurate measurement of specific volumes, such as 25.0 cm³. In contrast, measuring cylinders and beakers are less precise, and gas syringes are used for gases, making the pipette the best choice.

Which of the following is used to measure temperature?

• Burette

• Thermometer

• Stopwatch

• Gas syringe

Answer explanation

A thermometer is specifically designed to measure temperature, making it the correct choice. A burette measures liquid volume, a stopwatch measures time, and a gas syringe is used for gas volume.

Which apparatus would you use to measure the mass of a solid?

• Thermometer

• Measuring cylinder

• Balance

• Stopwatch

Answer explanation

A balance is the correct apparatus to measure the mass of a solid, as it provides accurate weight measurements. A thermometer measures temperature, a measuring cylinder measures volume, and a stopwatch measures time.

Which of these is used to measure the volume of a gas?

• Gas syringe

• Balance

• Thermometer

• Stopwatch

Answer explanation

A gas syringe is specifically designed to measure the volume of gas accurately. The other options, such as a balance, thermometer, and stopwatch, serve different purposes and do not measure gas volume.

Which apparatus allows you to deliver small, measured volumes of a liquid drop by drop?

• Pipette

• Gas syringe

• Burette

• Measuring cylinder

Answer explanation

A burette is specifically designed to deliver precise volumes of liquid drop by drop, making it ideal for titrations. Unlike a pipette, which delivers fixed volumes, a burette allows for variable and controlled dispensing.

Which apparatus is more accurate for measuring 50 cm³ of a solution?

• Beaker

• Measuring cylinder

• Burette

• Volumetric pipette

Answer explanation

The volumetric pipette is the most accurate for measuring 50 cm³ of a solution, as it is designed for precise volume measurements, unlike beakers and measuring cylinders which have lower accuracy.

What is a disadvantage of using a beaker to measure liquid volume?

• Difficult to handle

• Expensive

• Not accurate

• Fragile

Answer explanation

A beaker is not accurate for measuring liquid volume because its markings are often not precise, leading to potential measurement errors. This makes it less reliable compared to more accurate measuring tools like graduated cylinders.

Which instrument offers the highest accuracy in measuring volume?

• Measuring cylinder

• Burette

• Pipette

• Beaker

Answer explanation

The burette offers the highest accuracy in measuring volume due to its fine scale and ability to deliver precise amounts of liquid. It is designed for titration, allowing for accurate volume measurements compared to other instruments.

A student wants to measure 15.5 cm³ of acid accurately. Which should she use?

• Measuring cylinder

• Burette

• Pipette

• Beaker

Answer explanation

A burette is ideal for measuring precise volumes of liquid, such as 15.5 cm³ of acid, due to its fine control and accuracy. Measuring cylinders and pipettes are less precise for this specific volume, while beakers are not suitable for accurate measurements.