NEET Classification of Elements and Periodicity in Properties — Set 14

Question 1

Which of the following is a pnictogen?

Accepted Answer

Pnictogens are group 15 elements. Sb (group 15) is a pnictogen, while Te (group 16), I (group 17), and Sn (group 14) are not.

Question 2

Which of the following elements is a metalloid in group 15?

Accepted Answer

In group 15, As is a metalloid, while N (non-metal), P (non-metal), and Bi (metal) are not.

Question 3

Which group 14 element exhibits the maximum tendency to form $\pi$-bonds?

Accepted Answer

Smaller size and higher electronegativity favor $\pi$-bonding in group 14. C (period 2) forms $\pi$-bonds (e.g., in $\ce{C2H4}$) more readily than Si, Ge, or Sn due to effective 2p orbital overlap.

NEET Chemistry: Classification of Elements and Periodicity in Properties — Practice Set 14

Q1. Which of the following is a pnictogen?

Q2. Which of the following elements is a metalloid in group 15?

Q3. Which group 14 element exhibits the maximum tendency to form \(\pi\)-bonds?

Q4. Which element in the fourth period has the highest fifth ionization enthalpy?

Q5. Which group 15 element forms a hydride with the highest bond angle?

Q6. Which element has the electronic configuration ending in \(4s^2 4p^3\) in its ground state?

Q7. Arrange O, S, Se in order of decreasing electronegativity.

Q8. Which of the following ions has the smallest radius among isoelectronic species with 18 electrons?

Q9. Which pair of elements from different periods shows the least difference in electronegativity?

Q10. Which of the following elements is an alkaline earth metal?