The layer of Zinc metal can prevent corrosion easily. Remember that, the iron rod can be protected from corrosion by coating a thin layer of zinc metal. The process of coating zinc cover over iron is called galvanization. It is ...

Vanilla essence can be used as an acid base indicator by visually impaired students as it is an olfactory indicator whose smell changes in acidic or basic media.

(i)it is an endothermic reaction (ii) it is an exothermic reaction (iii) the pH of the resulting solution will be more than 7 (iv) the pH of the resulting solution will be less than 7

Class IX Science MCQ Extra Questions Answers Class 9th Science Session 2022-23 Class 9 Science Terminal Exams MCQ Solutions 9th Science Terminal Exam Based MCQ Extra Questions