Hello i had ordered a saree of rs 621 on 6th january 2018 from mirraw.com. My order no is 17419 and product ss56. I got my order on 13th january and it is entirely different from what i had ordered. So i returned back the product through professional courier with tracking number knp[protected] and it is already delivered to them.
Click for larger image. Acid and Base Indicators. Acid-Base Indicators: The most common method to get an idea about the pH of solution is to use an acid base indicator. An indicator is a large organic molecule that works somewhat like a  color dye. Whereas most dyes do not change color with the amount of acid or base present, there are many molecules, known as acid-base indicators, which do respond to a change in the hydrogen ion concentration.
Definition: A pH indicator is a compound that changes color in solution over a narrow range of pH values. Also Known As: acid-base indicator. Examples: Methyl red is a pH indicator used to identify pH values between 4.4 and 6.2. Bromocresol green is a pH indicator used to identify pH values between 3.8 and 5.4.