Dorji can use litmus test on these drinks. Just drop few drops of drink on litmus paper and take the decision according to the following: • If it turns blue, drink is basic. • If it turns red, drink is acidic. • If it turns green, drink is neutral. https://www.tiwariacademy.com/ncert-solutions/classRead more
Dorji can use litmus test on these drinks. Just drop few drops of drink on litmus paper and take the decision according to the following:
• If it turns blue, drink is basic.
• If it turns red, drink is acidic.
• If it turns green, drink is neutral.
When an acid solution and a base solution are mixed in suitable amounts, both the acidic nature of the acid and the basic nature of the base are destroyed. The resulting solution is neither acidic nor basic, it become neutral. This process is known as neutralisation reaction. Fill one fourth of a teRead more
When an acid solution and a base solution are mixed in suitable amounts, both the acidic nature of the acid and the basic nature of the base are destroyed. The resulting solution is neither acidic nor basic, it become neutral. This process is known as neutralisation reaction.
Fill one fourth of a test tube with dilute hydrochloric acid and add few drop of litmus solution. Now the colour of the solutions become red. Now add to this acidic solution drops of sodium hydroxide solution gradually one by one with a dropper. Stir the tube gently. Continue adding the sodium hydroxide solution drop by drop while stirring till the colour just become green. Now the effect of hydrochloric acid is neutralized by the base sodium hydroxide.
Distilled water is neutral by nature. We can verify it by litmus test. Water does not change the colour of either red or blue litmus. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-5/
Distilled water is neutral by nature. We can verify it by litmus test. Water does not change the colour of either red or blue litmus.
Litmus is extracted from lichens. It has a mauve (purple) colour in distilled water. When added to an acidic solution, it turns red and when added to a basic solution, it turns blue. So, it is used to test the acidic or basic nature of solutions. https://www.tiwariacademy.com/ncert-solutions/class-7Read more
Litmus is extracted from lichens. It has a mauve (purple) colour in distilled water. When added to an acidic solution, it turns red and when added to a basic solution, it turns blue. So, it is used to test the acidic or basic nature of solutions.
Dorji has a few bottles of soft drink in his restaurant. But, unfortunately, these are not labelled. He has to serve the drinks on the demand of customers. One customer wants acidic drink, another wants basic and third one wants neutral drink. How will Dorji decide which drink is to be served to whom?
Dorji can use litmus test on these drinks. Just drop few drops of drink on litmus paper and take the decision according to the following: • If it turns blue, drink is basic. • If it turns red, drink is acidic. • If it turns green, drink is neutral. https://www.tiwariacademy.com/ncert-solutions/classRead more
Dorji can use litmus test on these drinks. Just drop few drops of drink on litmus paper and take the decision according to the following:
• If it turns blue, drink is basic.
• If it turns red, drink is acidic.
• If it turns green, drink is neutral.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-5/
See lessDescribe the process of neutralisation with the help of an example.
When an acid solution and a base solution are mixed in suitable amounts, both the acidic nature of the acid and the basic nature of the base are destroyed. The resulting solution is neither acidic nor basic, it become neutral. This process is known as neutralisation reaction. Fill one fourth of a teRead more
When an acid solution and a base solution are mixed in suitable amounts, both the acidic nature of the acid and the basic nature of the base are destroyed. The resulting solution is neither acidic nor basic, it become neutral. This process is known as neutralisation reaction.
Fill one fourth of a test tube with dilute hydrochloric acid and add few drop of litmus solution. Now the colour of the solutions become red. Now add to this acidic solution drops of sodium hydroxide solution gradually one by one with a dropper. Stir the tube gently. Continue adding the sodium hydroxide solution drop by drop while stirring till the colour just become green. Now the effect of hydrochloric acid is neutralized by the base sodium hydroxide.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-5/
See lessIs the distilled water acidic/basic/neutral? How would you verify it?
Distilled water is neutral by nature. We can verify it by litmus test. Water does not change the colour of either red or blue litmus. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-5/
Distilled water is neutral by nature. We can verify it by litmus test. Water does not change the colour of either red or blue litmus.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-5/
See lessName the source from which litmus solution is obtained. What is the use of this solution?
Litmus is extracted from lichens. It has a mauve (purple) colour in distilled water. When added to an acidic solution, it turns red and when added to a basic solution, it turns blue. So, it is used to test the acidic or basic nature of solutions. https://www.tiwariacademy.com/ncert-solutions/class-7Read more
Litmus is extracted from lichens. It has a mauve (purple) colour in distilled water. When added to an acidic solution, it turns red and when added to a basic solution, it turns blue. So, it is used to test the acidic or basic nature of solutions.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-5/
See lessAmmonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature?
Bases turn red litmus blue, so nature of ammonia is basic. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-5/
Bases turn red litmus blue, so nature of ammonia is basic.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-5/
See less