Which of the following ion formation is always exothermic ?

A. Uni-negative
B. Uni-positive
C. Di-negative
D. Di-positive

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

Avogadros number may represent_________________?

A. Volume of particles
B. Number of particles
C. Mass of particles
D. All of the above

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

Which one of the following is not the mono isotopic element ?

A. Arsenic
B. Uranium
C. Iodine
D. Nickel

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

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

Combustion analysis is performed to determine__________________?

A. Empirical formula
B. Molecular mass
C. Molecular formula
D. Formula mass

Isotopes differ in_________________?

A. Properties which depend upon mass
B. Arrangement of electrons in orbitals
C. Chemical properties
D. All of the above