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Common Physical Quantities in Chemistry

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Questions and Answers

Which apparatus is considered the most accurate for measuring time?

Digital stopwatch (correct)

Kitchen timer

Sand timer

Analogue stopwatch

Which unit is NOT an SI unit for measuring length?

Metre

Foot (correct)

Millimetre

Centimetre

Which of the following statements about the alcohol thermometer is correct?

It can measure body temperature accurately.

It operates in a range of -10°C to 110°C. (correct)

It is digital and easy to read.

It measures temperatures below -10°C.

What is the main limitation of the measuring tape compared to a metre rule?

<p>It has lower accuracy, depending on the type.</p> Signup and view all the answers

What type of thermometer is specifically designed for measuring body temperature?

<p>Oral digital thermometer</p> Signup and view all the answers

Study Notes

Common Physical Quantities

Time, temperature, length, mass, and volume are common physical quantities measured in chemistry labs.

Appropriate Apparatus

Time: Digital stopwatches (accurate to 0.01 seconds) or analogue stopwatches (accurate to 0.15 seconds).
Temperature: Alcohol thermometers (range -10°C to 110°C), digital laboratory thermometers, oral digital thermometers (body temperature). Temperature sensors connected to data loggers offer automatic data collection.
Length: Metre rules (accurate to 0.1 cm), measuring tapes (accurate to 0.1 or 0.5 cm depending on the type).
Mass: Kilograms, grams, tonnes are used to measure mass
Volume: Cubic metres, cubic centimetres, cubic decimetres measure volume.

Apparatus for Experiments

The choice of apparatus depends on the specific experiment and level of accuracy needed.

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Description

This quiz covers the fundamental physical quantities commonly used in chemistry labs, including time, temperature, length, mass, and volume. Learn about the appropriate measuring apparatus for each quantity and the importance of accuracy in experiments.