Question

Among the following, which statement is not correct?

• A. Non-metals and metalloids exist only in the p-block of the periodic table
• B. Generally, non-metals have higher ionization enthalpies than metals
• C. The compounds formed by highly reactive non-metals with highly reactive metals are generally ionic in nature
• D. The non-metal oxides are basic

Hint:

Remember: non-metal oxides are acidic, metal oxides are basic.

Answer 1

The Correct Option is D

- (1) Correct – Non-metals and metalloids are mostly found in the p-block.
- (2) Correct – Non-metals usually have higher ionization enthalpies than metals.
- (3) Correct – Ionic compounds are typically formed between reactive metals and non-metals.
- (4) Incorrect – Non-metal oxides are acidic, not basic.

Answer 2

Among the following, which statement is not correct?

Step 1: Understand the nature of oxides:
Oxides can be broadly classified into acidic, basic, amphoteric, and neutral based on their chemical behavior when reacted with water or acids/bases.

Step 2: Behavior of non-metal oxides:
Non-metal oxides, such as CO₂, SO₂, NO₂, and P₂O₅, generally dissolve in water to form acids or react with bases to form salts. For example:
- CO₂ + H₂O → H₂CO₃ (carbonic acid)
- SO₂ + H₂O → H₂SO₃ (sulfurous acid)
This confirms their **acidic** nature.

Step 3: Identify the incorrect statement:
The statement "The non-metal oxides are basic" contradicts this known behavior. It is **not correct**, because non-metal oxides are generally **acidic**, not basic.

Final Answer:
\[ \boxed{\text{The non-metal oxides are basic}} \]