Nettet7. jan. 2024 · Litmus being a natural dye and indicator turns the color to red/ blue. When drops of lemon juice are put on blue litmus it turns red because of presence of acids. Now, when we will put some drops of soap solution on the same position i.e. on red litmus paper then the color of the litmus will change to blue. NettetAcids are sour in taste. Bases are bitter in taste and soapy to touch. Acid turns blue litmus red. Bases turn red litmus blue. Substances which are neither acidic nor basic are called neutral. Solutions of substances that show different colour in acidic, basic and neutral solutions are called indicators.
General_science_ _solutions_ for Class 8 Science Chapter 12 ...
NettetThe colour of filter paper after dipping in lime water becomes brownish red. It shows that the solution in container 'A' was: A) Red litmus solution done clear. B) Methyl red ... Reason (R): Red litmus turns blue in a solution containing vitamin 'C'. A) The pH scale ranges from zero to 14, with a pH of 7 being neutral, a pH less than 7 being acidic, and a pH greater than 7 being alkaline. Ammonia gas turns red litmus paper blue because it has a pH of 11.6. Milk of magnesia is slightly less alkaline, with a pH level of around 10.5. Sodium bicarbonate, otherwise known as baking soda, has a lower ... chicago guaranteed rate field
MCQ Questions for Class 7 Science Chapter 5 Acids, Bases
Nettet1. A solution turns red litmus blue, its pH is likely to be a) 1 (b) 4 (c) 5 (d) 10 Solution: The answer is 10 because litmus paper turns blue when the solution reacts with a basic solution (PH more than 7). Hence, 10 is the answer. 2. A solution reacts with crushed eggshells to give a gas that turns lime-water milky. The solution contains Nettet2. A compound if acidic will turn all indicators red. 3. Lime water turns red litmus blue. [NCERT Exemplar] 4. Common salt dissolved in water turns blue litmus red. 5. Phenolphthalein is a natural indicator. 6. Calamine can be used to treat ant’s sting. 7. Lemon water is basic in nature. NettetQuestion 13 State whether the following statements are true or false. Correct the false statements.a All substances are either acidic or basic.b A compound if acidic will turn … chicago gun deaths last weekend