Combined Techniques (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
What does elemental analysis determine in structure determination?
What does elemental analysis determine in structure determination?
Empirical formula
What does the molecular ion peak () in mass spectrometry indicate?
What does the molecular ion peak () in mass spectrometry indicate?
Molecular mass of compound
What is the second step when calculating an empirical formula from elemental analysis data?
What is the second step when calculating an empirical formula from elemental analysis data?
Divide all mole values by smallest
Where does the molecular ion peak typically appear in a mass spectrum?
Where does the molecular ion peak typically appear in a mass spectrum?
At the highest m/z value
What wavenumber indicates a group in IR spectroscopy?
What wavenumber indicates a group in IR spectroscopy?
Around 1710 cm
What does the number of peaks in a NMR spectrum indicate?
What does the number of peaks in a NMR spectrum indicate?
Number of carbon environments
Which three pieces of information does NMR provide?
Which three pieces of information does NMR provide?
Peaks, integration, splitting
According to the n+1 rule, how many peaks form when n = 2?
According to the n+1 rule, how many peaks form when n = 2?
Triplet (3 peaks)
At what chemical shift do aromatic protons typically appear in NMR?
At what chemical shift do aromatic protons typically appear in NMR?
= 6.9-8.0 ppm
What splitting pattern indicates a group in NMR?
What splitting pattern indicates a group in NMR?
Triplet at 1.2 ppm, quartet at 2.6 ppm