Periodic Table and Periodicity of Properties
9th chemistry chapter 3 solved exercise MCQs
- The atomic radii of elements in Periodic Table :
(a) increase from left to right in a period
(b) increase from top to bottom in a group ✔
(c) do not change from left to right in a period
(d) decrease from top to bottom in a group
2. The amount of energy given out when an electron is added to an atom is called :
(a) lattice energy
(b) ionization energy
(c) electronegativity
(d) electron affinity ✔
3. Mendeleev Periodic Table was based upon the :
(a) electronic configuration
(b) atomic mass ✔
(c) atomic number
(d) completion of subshell
4. Long form of Periodic Table is constructed on the basis of :
(a) Mendeleev Postulate
(b) atomic number ✔
(c) atomic mass
(d) mass number
5. 4th and 5th period of the long form of Periodic Table are called :
(a) short periods
(b) normal periods
(c) long periods ✔
(d) very long periods
6. Which one of the following halogen has lowest electronegativity ?
(a) fluorine
(b) chlorine
(c) bromine
(d) iodine ✔
7. Along the period, which one of the following decreases :
(a) atomic radius ✔
(b) ionization energy
(c) electron affinity
(d) electronegativity
8. Transition elements are :
(a) all gases
(b) all metals ✔
(c) all non-metals
(d) all metalloids
9. Mark the incorrect statement about ionization energy :
(a) it is measured in kj/mol
(b) it is absorption of energy
(c) it decreases in a period ✔
(d) it decreases in a group
10. Point out the incorrect statement about electron affinity :
(a) it is measured in kj/mol
(b) it is absorption of energy
(c) it decreases in a period ✔
(d) it decreases in a group
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- https://learnwithzahraawan.com/9th-chemistry-chapter-3-solved-exercise-short-questions/
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