(a) Preparation of one lyophilic and one lyophobic sol Lyophilic sol - starch, egg albumin and gum Lyophobic sol - aluminium hydroxide, ferric hydroxide, arsenous sulphide. (b) Dialysis of ...

Biology Viva Questions Class 12: The Class 12 Biology practical examination plays a crucial role in the board results, and the viva voce (oral exam) often decides the final impression of a student’s ...

Practical exams January 1 to February 14, 2026; marks must be uploaded the same day with no corrections allowed afterwards. Schools must ensure equipped labs, supply answer books, and coordinate with ...

The Central Board of Secondary Education (CBSE) has issued a detailed notice outlining strict instructions for the conduct of Practical Examinations/ projects/ internal assessments for Classes 10 and ...

For most subjects in Classes 10 and 12, the CBSE practical examination carries 20 marks, as per the official CBSE assessment pattern. These marks contribute directly to the final board result, making ...

With practical examinations set to begin early next year, the Central Board of Secondary Education has issued a firm reminder to all affiliated schools on the conduct of Class 10 and Class 12 ...