There is no specific word limit mentioned by the Staff Selection Commission (SSC) for the essay and letter writing sections in the SSC CHSL Tier-II Exam. However, it is important to keep in mind that the essays and letters should be of a reasonable length and should effectively convey the intended message. Here are some important points to consider:

Word Limit:
- The absence of a specified word limit implies that candidates have the freedom to choose an appropriate length for their essays and letters.
- However, it is advisable to maintain a word count between 200-300 words for each section to ensure that the content is concise and well-structured.

Essay Writing:
- Essay writing in the SSC CHSL Tier-II Exam usually requires candidates to express their opinions, analyze a given topic, or provide a solution to a problem.
- It is essential to introduce the topic clearly in the introductory paragraph and provide a strong thesis statement.
- The main body should consist of well-structured paragraphs, each focusing on a specific point with supporting evidence or examples.
- The conclusion should summarize the key points discussed and restate the thesis.

Letter Writing:
- Letter writing in the SSC CHSL Tier-II Exam usually requires candidates to write formal or informal letters based on a given scenario.
- The letter should be appropriately structured with a salutation, introduction, body paragraphs, and a closing.
- In formal letters, it is important to maintain a professional tone and adhere to the standard format.
- In informal letters, a friendly and conversational tone can be used.
- The content of the letter should address the given scenario clearly and concisely.

Key Points:
- No specific word limit is mentioned for the essay and letter writing sections in the SSC CHSL Tier-II Exam.
- Maintain a word count of 200-300 words for each section.
- Essays should have a clear introduction, well-structured body paragraphs, and a concise conclusion.
- Letters should follow the appropriate format and address the given scenario effectively.

It is important to note that these guidelines are based on general expectations for essay and letter writing. Candidates should also refer to the specific instructions provided in the exam question paper to ensure compliance with any additional requirements or constraints.