Chapter 4: Periodic Table & Periodicity Chemistry For High School - Grade 9(Chemistry ) Questions and Answers

Question 1. In the periodic table, helium is placed at
  1.    top left corner
  2.    bottom right corner
  3.    bottom left corner
  4.    top right corner
Explanation:-
Answer: Option D. -> top right corner
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. Across the period the atomic size decreases due to
  1.    shielding effect
  2.    photoelectric effect
  3.    increase in nuclear force of attraction
  4.    decrease in nuclear force of attraction
Explanation:-
Answer: Option C. -> increase in nuclear force of attraction
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. Both elements of 1st period contain valence electrons in
  1.    M shell
  2.    N shell
  3.    K shell
  4.    S shell
Explanation:-
Answer: Option C. -> K shell
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. Group A elements are called
  1.    metals
  2.    alkali metals
  3.    representative elements
  4.    transition elements
Explanation:-
Answer: Option C. -> representative elements
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. Chemical properties depend upon
  1.    electronic configuration
  2.    valence shell electronic configuration
  3.    atomic mass
  4.    atomic size
Explanation:-
Answer: Option B. -> valence shell electronic configuration
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. As we go from top to bottom in a group the shielding effect
  1.    doesn't change
  2.    decreases
  3.    increases
  4.    remains constant
Explanation:-
Answer: Option C. -> increases
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. The energy required to remove an electron from the outermost shell is called
  1.    potential energy
  2.    kinetic energy
  3.    mechanical energy
  4.    ionization energy
Explanation:-
Answer: Option D. -> ionization energy
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. Nobel gases are present in
  1.    VIIA group
  2.    VIA group
  3.    VA group
  4.    VIIIA group
Explanation:-
Answer: Option D. -> VIIIA group
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. On basis of electronic configuration the group and period of ⁹₅B is
  1.    2 and IIIA
  2.    3 and IIA
  3.    4 and VIA
  4.    5 and VIIA
Explanation:-
Answer: Option A. -> 2 and IIIA
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. The first three periods are
  1.    long periods
  2.    short periods
  3.    moderate periods
  4.    all of above
Explanation:-
Answer: Option B. -> short periods
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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