Ionisation Energy - MCQ

Ionisation Energy - MCQ

Dear Readers,

Compared to other sections, Chemistry is considered to be the most scoring section. If prepared thoroughly, chemistry can help students to secure a meritorious position in the exam. These questions are very important in achieving your success in Exams after 12th.

Q1. The incorrect statement among the following is

•  The first ionisation potential of Al is less than the first ionisation potential of Mg
•  The second ionisation potential of Mg is greater than the second ionisation potential of Na
•  The first ionisation potential of Na is less than the first ionisation potential of Mg
•  The third ionisation potential of Mg is greater than the third ionisation potential of Al

Q2. The second ionisation potential of an element M is the energy required to

•  Remove one mole of electron from one mole of gaseous anion
•  Remove one mole of electron from one mole of gaseous cation of the element
•  Remove one mole of electron from one mole of monovalent gaseous cation of the element
•  Remove 2 moles of electrons from one mole of gaseous atoms

Q3. The ionization energy of an element is

•  The same as the electron affinity of the element
•  Equal in magnitude but of opposite sign to the electron affinity of the element
•  The energy released when an electron is added to an atom of the element
•  The energy required to remove the outermost electron of an atom of the element

Q4. The first ionisation energies of alkaline earth metals are higher than those of the alkali metals. This is because

•  There is increase in the nuclear charge of the alkaline earth metals
•  There is a decrease in the nuclear charge of the alkaline earth metals
•  There is no change in the nuclear charge
•  None of the above

Q5. The statement that is not correct for the periodic classification of elements is

•  The properties of elements are the periodic functions of their atomic numbers
•  Non-metallic elements are lesser in number than metallic elements
•  The first ionisation energies along a period do not vary in a regular manner with increase in atomic number
•  For transition elements the -sub-shells are filled with electrons monotonically with increase in atomic number

Q6. Choose the correct statement

•  Ionization energy and electron affinity increases across a period
•  Ionization energy increases but electron affinity decreases along a period
•  Ionization energy decreases but electron affinity increases
•  Both decreases along a period

Q7. In halogens, with the increase of atomic number which habit is found

•  Habit to loose electrons decreases
•  Ionic radii decreases
•  Ionization potential decreases
•  In MX₂ (M= metal and X= halogen), covalent properties decreases

Q8. Ionization potential is lowest for

•  Halogens
•  Inert gases
•  Alkaline earth metals
•  Alkali metals

Q9. Which of the following explanation is best for not placing hydrogen in either the group of alkali metals or halogens?

•  The ionization energy of hydrogen is to high for group of alkali metals, but too low of halogen group
•  Hydrogen can form compounds with all other elements
•  Hydrogen is much lighter element than the alkali metals or the halogens
•  None of the above

Q10. The ionization energy of nitrogen is more than that of oxygen because

•  Nitrogen has half filled p-orbitals
•  Nitrogen is left to the oxygen in the same period of the periodic table
•  Nitrogen contains less number of electrons
•  Nitrogen is less electronegative