Dempsters mass spectrometer has number of zones / parts
A. 5
B. 4
C. 3
D. 2
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Chemistry
The nucleus of an atom of every element will always contain
A. neutrons
B. protons and electrons
C. protons
D. protons and neutrons
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Which method is used to estimate hydrogen in an organic compound?
A. Combustion method
B. Dumas method
C. Kjeldahls method
D. All of the above methods are for different purposes
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Isotopes differ in
A. properties which depend upon mass
B. arrangement of electrons in orbitals
C. chemical properties
D. all of the above
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Combustion analysis is performed to determine
A. Empirical formula
B. Molecular mass
C. Molecular formula
D. Formula mass
Combustion analysis is performed to determine Read More »
Qualitative analysis is carried out for
A. identification of elements
B. estimation of amounts of elements
C. molar ration of elements
D. molar volume of elements
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Which of the following statements is wrong about isotopes?
A. they possess different mass number
B. they possess different physical properties
C. they possess same chemical properties
D. they possess different position in the periodic table
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The mass of decimole of electrons (NA) is
A. 1.008 mg
B. 0.184 mg
C. 0.054 mg
D. 5.4 mg
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Which of the following is not the mono isotopic element
A. arsenic
B. uranium
C. iodine
D. nickel
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