Chemistry MCQs

Page No. 119

Which of the following statements about isotopes is correct ?


aIsotopes with odd atomic number are abundant


bIsotopes with odd atomic number and even mass number are abundant


cIsotopes with even atomic number and even mass number are abundant


dIsotopes with even atomic number and odd mass no are abundant



Molecular mass of water (18g) means__________________?


a1-mole molecules of water


b1-gram molecule of water


c3-gram atoms


dall


View Answer all

Empirical formula of chloroform is____________________?


aCH2 C12


bCH3C1


cCC14


dCHCL3


View Answer CHCL3

The number of peaks obtained in mass spectrometry shows____________________?


aRelative abundance


bAverage mass of element


cNumber of isotopes


dRelative isotopic mass


View Answer Number of isotopes

Mass spectrometer is used to determine Mass number of isotopes and___________________?


aAtomic number


bRelative abundance


cElectronic configuration


dAll of the above


View Answer Relative abundance

Diameter of an atom is in the order of________________?


a0.2m


b 0.2mm


c0.2nm


d0.2pm


View Answer 0.2nm

The radioactive isotope of hydrogen is called___________?


atritium


bdeuterium


cprotium


dortho-hydrogen


View Answer tritium

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