Register Now and enjoy 25% off on your first 5 courses (Published Courses & Group / Batch Classes)
Q. 1. State differences between acids and bases.
Q.2. Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature?
Q.3. Name the source from which litmus solution is obtained. What is the use of this solution?
Q.4. Is the distilled water acidic/basic/neutral? How would you verify it?
Q.5 Describe the process of neutralization with the help of an example.
6. Mark ‘T’ if the statement is true and ‘F’ if it is false:
(i) Nitric acid turns red litmus blue. (T/F)
(ii) Sodium hydroxide turns blue litmus red. (T/F)
(iii) Sodium hydroxide and hydrochloric acid neutralize each other and form salt and water. (T/F)
(iv) Indicator is a substance which shows different colors in acidic and basic solutions. (T/F)
(v) Tooth decay is caused by the presence of a base. (T/F)
Q.7.Dorji has a few bottles of soft drinks in his restaurant. But, unfortunately, these are not labeled. He has to serve the drinks on the demand of customers. One customer wants an acidic drink, another wants a basic one and the third one wants a neutral drink. How will Dorji decide which drink is to be served to whom?
Q.8. Explain why:
(a) An antacid tablet is taken when you suffer from acidity.
(b) Calamine solution is applied on the skin when an ant bites.
(c) Factory waste is neutralized before disposing it into the water bodies.
Q. 9. Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and the third is a sugar solution. How will you identify them? You have only a turmeric indicator.
Q. 10. Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain.
Q.11. Consider the following statements:
(a) Both acids and bases change the color of all indicators.
(b) If an indicator gives a color change with an acid, it does not give a change with a base.
(c) If an indicator changes color with a base, it does not change color with an acid.
(d) Change of color in an acid and a base depends on the type of the indicator.
Which of these statements are correct?
(i) All four (ii) a and d (iii) b, c, and d (iv) only d
Q.8. Explain why:
(a) An antacid tablet is taken when you suffer from acidity.
(b) Calamine solution is applied on the skin when an ant bites.
(c) Factory waste is neutralized before disposing it into the water bodies.
Q. 9. Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and the third is a sugar solution. How will you identify them? You have only a turmeric indicator.
Q. 10. Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain.
Q.11. Consider the following statements:
(a) Both acids and bases change the color of all indicators.
(b) If an indicator gives a color change with an acid, it does not give a change with a base.
(c) If an indicator changes color with a base, it does not change color with an acid.
(d) Change of color in an acid and a base depends on the type of the indicator.
Which of these statements are correct?
(i) All four (ii) a and d (iii) b, c, and d (iv) only d
0 Rating
00:03:25
Q. 1. State differences between acids and bases. Q.2. Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature? Q.3. Name the source from which litmus solution is obtained. What is the use of this solution? Q.4. Is the distilled water acidic/basic/neutral? How would you verify it? Q.5 Describe the process of neutralisation with the help of an example. 6. Mark ‘T’ if the statement is true and ‘F’ if it is false: (i) Nitric acid turn red litmus blue. (T/F) (ii) Sodium hydroxide turns blue litmus red. (T/F) (iii) Sodium hydroxide and hydrochloric acid neutralise each other and form salt and water. (T/F) (iv) Indicator is a substance which shows different colours in acidic and basic solutions. (T/F) (v) Tooth decay is caused by the presence of a base. (T/F) Q.7.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? Q.8. Explain why: (a) An antacid tablet is taken when you suffer from acidity. (b) Calamine solution is applied on the skin when an ant bites. (c) Factory waste is neutralised before disposing it into the water bodies. Q. 9. Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and third is a sugar solution. How will you identify them? You have only turmeric indicator. Q. 10. Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain. Q.11. Consider the following statements: (a) Both acids and bases change colour of all indicators. (b) If an indicator gives a colour change with an acid, it does not give a change with a base. (c) If an indicator changes colour with a base, it does not change colour with an acid. (d) Change of colour in an acid and a base depends on the type of the indicator. Which of these statements are correct? (i) All four (ii) a and d (iii) b, c and d (iv) only d
Q. 1. State differences between acids and bases. Q.2. Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature? Q.3. Name the source from which litmus solution is obtained.What is the use of this solution? Q.4. Is the distilled water acidic/basic/neutral? How would you verify it?
Q.5 Describe the process of neutralisation with the help of an example. 6. Mark ‘T’ if the statement is true and ‘F’ if it is false: (i) Nitric acid turn red litmus blue. (T/F) (ii) Sodium hydroxide turns blue litmus red. (T/F) (iii) Sodium hydroxide and hydrochloric acid neutralise each other and form salt and water. (T/F) (iv) Indicator is a substance which shows different colours in acidic and basic solutions. (T/F) (v) Tooth decay is caused by the presence of a base. (T/F)
Q.7.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? Q.8. Explain why: (a) An antacid tablet is taken when you suffer from acidity. (b) Calamine solution is applied on the skin when an ant bites. (c) Factory waste is neutralised before disposing it into the water bodies.
Q. 9. Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and third is a sugar solution. How will you identify them? You have only turmeric indicator. Q. 10. Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain. Q.11. Consider the following statements: (a) Both acids and bases change colour of all indicators. (b) If an indicator gives a colour change with an acid, it does not give a change with a base. (c) If an indicator changes colour with a base, it does not change colour with an acid. (d) Change of colour in an acid and a base depends on the type of the indicator. Which of these statements are correct? (i) All four (ii) a and d (iii) b, c and d (iv) only d
Why the Cell is called the structural and functional unit of life? What are the three basic components of a cell? Organisms show varie
25% off Convert between BINARY, OCTAL, DECIMAL & HEXADECIMAL numbers with ease and increase your analytical and critical thinking skills.
Where do animals get their food from? Why do we have to eat food? Since we all need food, how can we provide food to a large number of people in o
1. Who discovered the cells? 2. What are the three basic components of cell theory? 3. Name the two scientists who are usually credited for developi
1. What is cell wall? Whether cell wall is found in animal cells? 2. From which substance the cell wall is mainly composed of? 3. What is the benefi
Can air, water and soil be exhausted by human activities? You have already studied about water in Class VII. Is water a limitless resource? In the l
What is the meaning of sustainable development? What are the three core elements of sustainable development? How can we achieve sustainable develop
A computer virus is a malicious software program which has the ability to make copies of itself. The computer virus infects the files and programs p
In this course, we will discuss : 1. Meaning of Cyber Security 2. Some statistics related to Cyber Security 3. Importance of Cyber Security 4. Sys
In this course, we will learn: 1.What is the meaning of Data? What is the meaning of Information? What is the difference between Da
1. Why do organisms take food? 2. Distinguish between a parasite and a saprotroph. 3. How would you test the presence of starch in leaves? 4. Give
Q.1. Name the elements that determine the weather of a place. Q.2. When are the maximum and minimum temperatures likely to occur during the day? 3.
In this course, we will discuss the complete chapter including the following questions : Q.1. Name two types of fibers with examples. Q.2. Give tw
Q1. In a school athletic meet, a boy ran at a speed of 2m/s and stood first in a 200m race. How much distance is covered by him per second?
Full chapter explanation which will cover the following : 1. What is the meaning of lightning? 2. What are the various types of lightning? 3. Wha
Today, we will try to find out the answers to these questions: Q.1. What are the different ways in which water gets contaminated? Q.2. : At an ind
Q.1. : Explain why some fibers are called synthetic Q.2: Mark the correct answer : Rayon is different from synthetic fibers because (a) It
Deforestation is the removal of a forest or stand of trees from land and using that land for other purposes. - Causes of Deforestation are man-made a
Q.1. Which of the following can be beaten into thin sheets? (a) Zinc (b) Phosphorus (c) Sulphur (d) Oxygen Q. 2. Which of the followi
In this course, we will discuss : What is the meaning of nutrition? Write a few lines on the five steps involved in the process of nutrition
