Question

Identify the correct statements about p-block elements and their compounds.
(A) Non metals have higher electronegativity than metals.
(B) Non metals have lower ionisation enthalpy than metals.
(C) Compounds formed between highly reactive nonmetals and highly reactive metals are generally ionic.
(D) The non-metal oxides are generally basic in nature.
(E) The metal oxides are generally acidic or neutral in nature.

• (D) and (E) only
• (A) and (C) only
• (B) and (E) only
• (B) and (D) only

Answer 1

The Correct Option is B

To determine the correct statements about p-block elements and their compounds, we need to evaluate each statement based on our understanding of chemistry:

1. (A) Non-metals have higher electronegativity than metals.
   \(\text{Electronegativity}\, is\, a\, measure\, of\, an\, atom's\, ability\, to\, attract\, and\, bond\, with\, electrons.\) In general, non-metals have higher electronegativity because they tend to gain electrons to form anions. This statement is correct.
2. (B) Non-metals have lower ionisation enthalpy than metals.
   Ionisation enthalpy is the energy required to remove an electron from an atom. Non-metals, which tend to hold onto their electrons more tightly than metals, generally have higher ionisation enthalpy. Therefore, this statement is incorrect.
3. (C) Compounds formed between highly reactive nonmetals and highly reactive metals are generally ionic.
   Compounds such as sodium chloride (NaCl) form when a highly reactive metal (like sodium) transfers an electron to a highly reactive non-metal (like chlorine), resulting in an ionic bond. This statement is correct.
4. (D) The non-metal oxides are generally basic in nature.
   Non-metal oxides, like CO\(_2\), SO\(_2\), are generally acidic or neutral, not basic. This statement is incorrect.
5. (E) The metal oxides are generally acidic or neutral in nature.
   Metal oxides, such as \( \text{CaO} \) or \( \text{Na}_2\text{O} \), are typically basic, not acidic or neutral (with a few exceptions). Therefore, this statement is incorrect.

Thus, the correct statements are (A) and (C). Hence, the correct answer is the option:

(A) and (C) only

Answer 2

Statement (A): True.Non-metals, being more electronegative, tend to attract electrons more strongly compared to metals.
Statement (B): False. Non-metals generally have higher ionization enthalpy than metals due to their smaller atomic sizes and higher nuclear charges.
Statement (C): True. Compounds formed between highly reactive metals (like alkali metals) and highly reactive non-metals (like halogens) are ionic in nature due to significant electronegativity differences.
Statement (D): False. Non-metal oxides are generally acidic in nature, not basic
Statement (E): False. Metal oxides are generally basic in nature, though some transition metal oxides may be amphoteric or acidic.
Thus, the correct statements are:
\[\text{(A) and (C) only.}\]