List of top Chemistry Questions on Periodicity of Elements asked in CUET (PG)

The increasing order of molarity of 25 gm each of:
(A) \( \text{NaOH} \)
(B) \( \text{LiOH} \) 
(C) \( \text{KOH} \) 
(D) \( \text{Al(OH)}_3 \) 
(E) \( \text{B(OH)}_3 \)
in the same volume of water is:
Choose the correct answer from the options given below:
The correct order of decreasing ionic radii among the following isoelectronic species
  1. \(K^+, \, Ca^{2+}, \, Cl^-, \, S^{2-}\)
  2. \(K^+, \, Cl^-, \, Ca^{2+}, \, S^{2-}\)
  3. \(S^{2-}, \, Ca^{2+}, \, Cl^-, \, K^+\)
  4. \(S^{2-}, \, Cl^-, \, K^+, \, Ca^{2+}\)
Choose the correct answer from the options given below:
Electronegativity of the following elements increases in the order
(A). C
(B). N
(C). Si
(D). P
Choose the correct answer from the options given below:
Which of the following species has the highest electron affinity?