From f0da1ce3e3c119df0847eaa16b8dae948656f813 Mon Sep 17 00:00:00 2001 From: shivaansehgal <44942355+shivaansehgal@users.noreply.github.com> Date: Mon, 25 Mar 2019 05:18:53 +0530 Subject: [PATCH] Update Quizzes.html --- src/lab/exp9/Quizzes.html | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-) diff --git a/src/lab/exp9/Quizzes.html b/src/lab/exp9/Quizzes.html index 61c7d99..7b7718d 100644 --- a/src/lab/exp9/Quizzes.html +++ b/src/lab/exp9/Quizzes.html @@ -24,6 +24,7 @@ + @@ -152,71 +153,71 @@

Determination of Molar Mass of Simple Compounds Us b. functionals groups
c. conjugation
d. vibrational states
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2. The ions are separated based on their mass to charge ratios in
a. ionsiation chamber
b. mass analyzer
c. sample inlet
d. detector
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3. The typical ionisation energy used in a EI-MS is:
a. 0.7 eV
b. 7 eV
c. 70 eV
d. 700 e V
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4. Mass spectrum is a plot of:
a. relative intensity vs mass-to-charge
b. relative intensity vs mass-to-energy
c. voltage vs mass-to-charge
d. voltage vs mass -to -energy
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5. The molecular ion peak in a mass spectrum corresponds to:
a. ion formed by fragmentation of a molecule
b. molecule losing an electron to form a radical cation
c. the most abundant ion
d. ion with smallest mass-to-charge
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6. The base peak in a mass spectrum corresponds to:
a. ion formed by fragmentation of a molecule
b. molecule losing an electron to form a radical cation
c. the most abundant ion
d. ion with smallest mass-to-charge
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7. In an magnetic sector mass analyser, the ion separation is based on:
a. ions with the correct mass-to-charge ratio undergo stable oscillation and passes through the cylinderal rods before they hit the detector
b. lighter ions have higher velocity
c. greater mass to charge ratio have larger radius of the curved path
d. Heavier ions have higher velocity
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8. The sample introduced into the sample inlet first gets:
a. vapourised
b. ionised
c. accelarated
d. deflected
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9. If a compound has an even number of nitrogen atoms, its molecular ion will appear at an even mass value. This is called:
a. Mass rule
b. Molecular ion rule
c. Nitrogen rule
d. Stevenson's rule
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10. The most probable fragmentation is the onw that leaves the positive charge on the fragment with the lowest ionsiation energy. This rule is called:
a. Mass rule
b. Molecular ion rule
c. Nitrogen rule
d. Stevenson's rule
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