Chemistry Class 9th
201- Ionization energy --------- down the group
A) Decreases
B) Increases
C) Remains same
202 - Ionization energy --------- across the period.
A) Decreases
B) Increases
C) Remains same
203- Ionization energy of metals is --------- than non-metals.
A) Less
B) Greater
C) Constant
204- Ionization energy of noble gases is
A) Low
B) High
C) Highest
205- Ionization energy of an element is measured in
A) Joules
B) Kilo joule per mol
C) Both a and b
206-1st I.E of Na is
A) 480 KJ/mol
B) 496 KJ/mol
C) 510 KJ/mol
207- 1st I.E of Mg is
A) 738 KJ/mol
B) 680 KJ/mol
C) 510 KJ/mol
208-The energy required to remove 2nd electrone from outermost shell is called
A) 1st I.E
B) 2nd I.E
C) I.E
209-2nd I.E. of Mg is
A) 738 KJ/mol
B) 980 KJ/mol
C) 1450 KJ/mol
210- I.E. depends on
A) Atomic radius
B) Nuclear charge
C) Both a and b
211-Elements at the top of group have -------- I.E.
A) Minimum
B) Maximum
C) Same
212- Elements at the bottom of group have -------- I.E
A) Minimum
B) Maximum
C) Same
213-The element at the extreme right of the period has ------- I.E.
A) Minimum
B) Maximum
C) Constant
214- The element at the extreme left of the period has ------- I.E.
A) Minimum
B) Maximum
C) Constant
215-Electron affinity means love or ------ for accepting electron.
A) Attraction
B) Repulsion
C) Hating
216-The minimum amount of energy released during the addition of electron to the outermost shell of gaseous atom is called
A) Ionization energy
B) Electron affinity
C) Atomic radius
217- Electron affinity measured in units of
A) Work
B) Energy
C) Both a and b
218-The units for E.A. are
A) KJ
B) KJ/mol
C) Both a and b
219-The value of electron affinity of chlorine is
A) -360KJ/mol
B) -348KJ/mol
C) -390 KJ/mol
220-The energy released during the addition of 1st electron is known as
A) Electron affinity
B) 1st electron affinity
C) Ionization energy