Which of the following statements about indicators and pH scale is/are correct? 1. Phenolphthalein turns pink in basic solutions 2. Methyl orange turns red in acidic solutions 3. Pure water has a pH value of 7 at 25°C Select the answer using the code given below:

Which of the following statements about universal indicator is/are true ? 1. It is a mixture of several indicators. 2. It shows different colours at different concentrations of hydrogen ions in solut…

Which of the following statements is/are correct? 1. All the bases are alkali. 2. All alkalis dissolve in water. 3. Alkalis are soapy to touch, bitter in taste Select the correct answer using the cod…

Match List I with List II and select the answer using the code given below the Lists: Column A: A. Tomato B. Sour milk C. Ant sting D. Vinegar Column B: 1. Acetic acid 2. Methanoic acid 3. Oxalic Aci…

Match List- I with List- II and select the correct answer from the code given below the lists : List-I A. Pickle B. Sour Milk C. Apple D. Cold drinks and soda water List-II 1. Carbonic Acid 2. Acetic…

Which one of the following is the correct sequence of change in colours when a turmeric stain on white clothes is scrubbed by soap and then washed with water?