When we move from left to right in a period electropositive charcter (A)The basic nature of the oxides increase (B)The basic nature of the oxides decreases (C)There is no regular trend in the nature of oxides (D)Oxides of ony first two group are basic in nature.

Options

A. The basic nature of the oxides increase
B. The basic nature of the oxides decreases
C. There is no regular trend in the nature of oxides
D. Oxides of ony first two group are basic in nature.

Explanation

To solve the question regarding the trend of electropositive character and the basic nature of oxides as we move from left to right in a period, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Electropositivity**: Electropositivity refers to the tendency of an element to lose electrons and form positive ions. This property is characteristic of metals.

**Hint**: Recall that elements on the left side of the periodic table (like alkali and alkaline earth metals) are more electropositive compared to those on the right (like nonmetals).

2. **Identify the Trend Across a Period**: As we move from left to right in a period, the electropositive character (or metallic character) of the elements decreases. This is because the elements transition from metals to nonmetals.

**Hint**: Remember that the periodic table is arranged such that metals are on the left and nonmetals are on the right.

3. **Relate Electropositivity to Oxides**: Metals typically form basic oxides. As the metallic character decreases (moving left to right), the basic nature of the oxides formed by these elements also decreases.

**Hint**: Think about common oxides: metal oxides are often basic (like Na2O), while nonmetal oxides are acidic (like CO2).

4. **Evaluate the Options**:
- **(A)** The basic nature of the oxides increases - This is incorrect because basicity decreases as we move to nonmetals.
- **(B)** The basic nature of the oxides decreases - This is correct as explained.
- **(C)** There is no regular trend in the nature of oxides - This is incorrect; there is a clear trend.
- **(D)** Oxides of only the first two groups are basic in nature - This is incorrect; other metals also form basic oxides.

5. **Conclusion**: The correct answer is (B) The basic nature of the oxides decreases.

### Final Answer:
(B) The basic nature of the oxides decreases.