NEET Classification of Elements and Periodicity in Properties — Set 9

Question 1

Which pair of elements exhibits a diagonal relationship?

Accepted Answer

B (group 13, period 2) and Si (group 14, period 3) show a diagonal relationship due to similar size and properties, unlike the other pairs.

Question 2

Which oxide is neutral in nature?

Accepted Answer

Neutral oxides do not react with acids or bases. $\ce{CO}$ (group 14) is neutral, unlike $\ce{K2O}$ (basic), $\ce{P2O5}$ (acidic), or $\ce{ZnO}$ (amphoteric).

Question 3

What is the formula of the hydride formed by phosphorus?

Accepted Answer

P (group 15) forms $\ce{PH3}$ with hydrogen, following the trend of group 15 hydrides.

NEET Chemistry: Classification of Elements and Periodicity in Properties — Practice Set 9

Q1. Which pair of elements exhibits a diagonal relationship?

Q2. Which oxide is neutral in nature?

Q3. What is the formula of the hydride formed by phosphorus?

Q4. Which of the following elements is a halogen?

Q5. What is the general outer electronic configuration of group 16 elements?

Q6. Which element in group 13 has the highest tendency to form covalent compounds due to its polarizing power?

Q7. Arrange the following elements in order of increasing first ionization enthalpy: B, C, N, O.

Q8. Which group 13 element forms a hydride that is electron-deficient?

Q9. Which of the following elements has the highest first ionization enthalpy?

Q10. Which element forms an oxide with the formula \(\ce{X2O}\), where X is a group 1 element?