As a result of your good wishes and cooperation, in the last few years, forty-eight editions of “Secondary Experimental Chemistry” have been published. We are very grateful to you for this. Now we are very happy to present the new forty-ninth edition of this book “Secondary Practical Chemistry Class 11” in front of you. This edition has been revised and expanded according to the new practical syllabus prescribed by the Board of Secondary Education, Uttar Pradesh, Prayagraj. In the latest edition of the present book, project works have also been included and oral questions (viva-voce) have been included chapter-wise.