"Errorless Chemistry for IIT-JEE(MAIN & ADVANCED)" is a popular series of prep books published by Universal Books and UBD1960, strictly following the NTA syllabus for both Main and Advanced exams. The books are known for their comprehensive theory, extensive solved practice questions, previous years' papers, and detailed solutions. The series is divided into two volumes for Class XI and Class XII and is available in both English and Hindi editions. 

Key features

• Comprehensive content: Includes exhaustive theory, short tricks, formulas, and practice questions.
• Question-based learning: Contains a large number of fully solved objective questions, including previous years' papers from the last 36 years, with explanations.
• NTA-aligned: Strictly follows the latest syllabus and exam pattern set by the National Testing Agency (NTA).
• Structure: The series is typically divided into two volumes, with Volume 1 for Class XI and Volume 2 for Class XII.
• Accurate and reliable: The "errorless" title signifies the publisher's focus on providing accurate content, and the series is trusted by many students and teachers. ​​​