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mnsoomro
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Which of the following terms is not used for ionic compound ?
A. formula unit B. empirical formula C. molecular formula D. formula mass Submitted by :- Jamil Ahmed
Which of the following statements about isotopes is correct ?
A. Isotopes with odd atomic number are abundant B. Isotopes with odd atomic number and even mass number are abundant…
Molecular mass of water (18g) means__________________?
A. 1-mole molecules of water B. 1-gram molecule of water C. 3-gram atoms D. all Submitted by :- Jamil Ahmed
Empirical formula of chloroform is____________________?
A. CH2 C12 B. CH3C1 C. CC14 D. CHCL3 Submitted by :- Jamil Ahmed
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…
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…