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
C. Isotopes with even atomic number and even mass number are abundant
D. Isotopes with even atomic number and odd mass no are abundant
Submitted by :- Jamil Ahmed
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 Khan
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