# NCERT Class 12 Chemistry Appendix II

Read and download NCERT Class 12 Chemistry Appendix II chapter in NCERT book for Class 12 Chemistry. You can download latest NCERT eBooks for 2021 chapter wise in PDF format free from Studiestoday.com. This Chemistry textbook for Class 12 is designed by NCERT and is very useful for students. Please also refer to the NCERT solutions for Class 12 Chemistry to understand the answers of the exercise questions given at the end of this chapter

Common Unit of Mass and Weight
1 pound = 453.59 grams
1 pound = 453.59 grams = 0.45359 kilogram
1 kilogram = 1000 grams = 2.205 pounds
1 gram = 10 decigrams = 100 centigrams
= 1000 milligrams
1 gram = 6.022 × 1023 atomic mass units or u
1 atomic mass unit = 1.6606 × 10–24 gram
1 metric tonne = 1000 kilograms
= 2205 pounds

Common Unit of Volume
1 quart = 0.9463 litre
1 litre = 1.056 quarts
1 litre = 1 cubic decimetre = 1000 cubic
centimetres = 0.001 cubic metre
1 millilitre = 1 cubic centimetre = 0.001 litre
= 1.056 × 10-3 quart
1 cubic foot = 28.316 litres = 29.902 quarts
= 7.475 gallons

Common Units of Energy
1 joule = 1 × 107 ergs
1 thermochemical calorie**
= 4.184 joules
= 4.184 × 107 ergs
= 4.129 × 10–2 litre-atmospheres
= 2.612 × 1019 electron volts
1 ergs = 1 × 10–7 joule = 2.3901 × 10–8 calorie
1 electron volt = 1.6022 × 10–19 joule
= 1.6022 × 10–12 erg
= 96.487 kJ/mol†
1 litre-atmosphere = 24.217 calories
= 101.32 joules
= 1.0132 ×109 ergs
1 British thermal unit = 1055.06 joules
= 1.05506 ×1010 ergs
= 252.2 calories

Common Units of Length
1 inch = 2.54 centimetres (exactly)
1 mile = 5280 feet = 1.609 kilometres
1 yard = 36 inches = 0.9144 metre
1 metre = 100 centimetres = 39.37 inches
= 3.281 feet
= 1.094 yards
1 kilometre = 1000 metres = 1094 yards
= 0.6215 mile
1 Angstrom = 1.0 × 10–8 centimetre
= 0.10 nanometre
= 1.0 × 10–10 metre
= 3.937 × 10–9 inch

Common Units of Force* and Pressure
1 atmosphere = 760 millimetres of mercury
= 1.013 × 105 pascals
= 14.70 pounds per square inch
1 bar = 105 pascals
1 torr = 1 millimetre of mercury
1 pascal = 1 kg/ms2 = 1 N/m2

Temperature
SI Base Unit: Kelvin (K)
K = -273.15°C
K = °C + 273.15
°F = 1.8(°C) + 32
C=F ° −32/1.8

Please refer to attached file for NCERT Class 12 Chemistry Appendix II

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