Chromatography and Spectroscopy (OCR A-Level Chemistry A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Which condition must a nucleus meet to exhibit nuclear spin?
Which condition must a nucleus meet to exhibit nuclear spin?
Odd number of nucleons
Why does C produce no signal in NMR spectroscopy?
Why does C produce no signal in NMR spectroscopy?
It has an even number of nucleons
What chemical shift value is assigned to TMS by definition?
What chemical shift value is assigned to TMS by definition?
0 ppm
What is a key advantage of NMR spectroscopy?
What is a key advantage of NMR spectroscopy?
Sample recovered after analysis
Why are deuterated solvents used in NMR spectroscopy?
Why are deuterated solvents used in NMR spectroscopy?
To prevent solvent H interfering
In which direction do chemical shift values increase on an NMR spectrum?
In which direction do chemical shift values increase on an NMR spectrum?
Right to left
What temperature must NMR superconducting electromagnets be cooled to?
What temperature must NMR superconducting electromagnets be cooled to?
4 K
What percentage of carbon atoms does C make up?
What percentage of carbon atoms does C make up?
About 1.1%
Why is deuterium invisible to H and C NMR?
Why is deuterium invisible to H and C NMR?
It has an even number of nucleons