The difference between the field necessary for resonance in the sample and in some arbitrary a chosen compound is which of the following?(a) Field shift(b) Matrix effects(c) Chemical shift(d) Resonance shiftThis question was addressed to me in quiz.My question is taken from Principle of Nuclear Magnetic Resonance Spectrometer in chapter Nuclear Magnetic Resonance Spectrometer of Analytical Instrumentation

The difference between the field necessary for resonance in the sample

1.	The difference between the field necessary for resonance in the sample and in some arbitrary a chosen compound is which of the following?(a) Field shift(b) Matrix effects(c) Chemical shift(d) Resonance shiftThis question was addressed to me in quiz.My question is taken from Principle of Nuclear Magnetic Resonance Spectrometer in chapter Nuclear Magnetic Resonance Spectrometer of Analytical Instrumentation
Answer» RIGHT CHOICE is (c) Chemical shift Easiest explanation: The difference between the FIELD necessary for resonance in the SAMPLE and in some arbitrary chosen compound is called a chemical shift. Chemical shift is expressed in parts per million.

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