Which one of the following is not the mono isotopic element ?
(A) arsenic
(B) uranium
(C) iodine
(D) nickel
Which of the following terms is used for the mass of chlorine 35.5 ?
(A) relative atomic mass
(B) mass number
(C) atomic weight
(D) relative isotopic mass
Size of molecule depends upon________________?
(A) Atomicity
(B) Shape of molecule
(C) Both A and B
(D) Difficult to predict
Avogadros number may represent_________________?
(A) volume of particles
(B) number of particles
(C) mass of particles
(D) All of the above
The sample of isotopes of an element which needs not to be vaporized in the vaporization chamer_________________?
(A) Gas
(B) Liquid
(C) Volatile solid
(D) All
Which of the following ion formation is always exothermic ?
(A) Uni-negative
(B) Uni-positive
(C) Di-negative
(D) Di-positive
Which one is true about isotope ?
(A) Same number of neutrons
(B) Same mass number
(C) Same physical properties
(D) Same chemical properties
Molecular ions are formed by passing______________________?
(A) High energy electron beam
(B) ? – particle
(C) X-rays
(D) All of the above
Which of the following are isoelectronic species ?
(A) H+ H H-
(B) Li+ Na+ K+
(C) C1- Br- I
(D) F- Ne Na+
1 a.m.u =__________________?
(A) 1.6 x 10-27 kg
(B) 1.6 x 10-24 kg
(C) 1.6 x 10-26 kg
(D) 1.6 x 10-28 kg