The number of peaks obtained in mass spectrometry shows____________________?
A. Relative abundance
B. Average mass of element
C. Number of isotopes
D. Relative isotopic mass
Submitted by :- Mansoor Khan
CHEMISTRY
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Mass spectrometer is used to determine Mass number of isotopes and___________________?
A. Atomic number
B. Relative abundance
C. Electronic configuration
D. All of the above
Submitted by :- Jamil Ahmed
The properties of an element mostly corresponds to that isotope which has greater_________________?
A. Mass number
B. Atomic mass
C. Relative abundance
D. all of the above
Submitted by :- Jamil Ahmed
For which of the following compounds the term empirical formula cannot be applied ?
A. NaCl
B. H2O
C. CCI4
D. It can be applied to all mentioned above
Submitted by :- Jamil Ahmed
When cationic molecular ions are allowed to pass through strong magnetic field in mass spectrometer which of the following ions is fallen__________________?
A. lighter
B. intermediate
C. heavier
D. are collected at same time
Submitted by :- Jamil Ahmed
Isotopes of the same elements has__________________?
A. different number of protons
B. same number of neutrons
C. different number of neutrons
D. same mass number (nucleon number)
Submitted by :- Jamil Ahmed
Which of the following is not a macromolecule ?
A. sand
B. hemoglobin
C. diamond
D. maltose
Submitted by :- Jamil Ahmed
Mostly elements have fractional atomic masses because of______________________?
A. Mass of an atom itself is in fraction
B. Atomic masses are average masses of isobars
C. Atomic masses are average masses of isotopes proportional to their relative abundance
D. Atomic masses are average masses of isotopes
Submitted by :- Jamil Ahmed
The volume occupied by 2.8 g of N2 at STP______________________?
A. 2.24 dm3
B. 22.4 dm3
C. 1.12 dm3
D. 112 dm3
Submitted by :- Jamil Ahmed
Which one of the following is not the mono isotopic element ?
A. arsenic
B. uranium
C. iodine
D. nickel
Submitted by :- Jamil Ahmed