NEET Classification of Elements and Periodicity in Properties — Set 11

Question 1

Which oxide of a group 2 element is least soluble in water?

Accepted Answer

Solubility of group 2 oxides decreases down the group as lattice energy dominates over hydration energy. $\ce{BaO}$ (largest cation) is the least soluble among BeO, MgO, CaO, and BaO.

Question 2

Which element belongs to the f-block of the periodic table?

Accepted Answer

f-block elements have electrons filling $f$-orbitals (lanthanoids and actinoids). Ce (Z=58) is an f-block element, while Sc (d-block), Rb (s-block), and Xe (p-block) are not.

Question 3

Which pair of elements from the same group shows the greatest increase in atomic radius?

Accepted Answer

Atomic radius increases down a group, with the largest jump often between early periods. In group 1, Li (period 2) to Na (period 3) shows a significant increase due to the addition of a new shell, compared to later pairs.

NEET Chemistry: Classification of Elements and Periodicity in Properties — Practice Set 11

Q1. Which oxide of a group 2 element is least soluble in water?

Q2. Which element belongs to the f-block of the periodic table?

Q3. Which pair of elements from the same group shows the greatest increase in atomic radius?

Q4. Which pair of elements from the same group shows the smallest difference in first ionization enthalpy?

Q5. Which group 14 element forms a tetrachloride with the highest boiling point?

Q6. Which hydride is formed by a group 15 element?

Q7. Which of the following is a metalloid in group 14?

Q8. Which element has the electronic configuration \(1s^2 2s^2 2p^6 3s^2 3p^6\)?

Q9. Which of the following is a noble gas?

Q10. Which of the following has the largest ionic radius?