Science Exemplar Problem Class 7
Class 7
1
Chapter 1: Nutrition in Plants
21 questions
2
Chapter 2: Nutrition in Animals
30 questions
3
Chapter 3: Fibre to Fabric
25 questions
4
Chapter 4: Heat
20 questions
5
Chapter 5: Acids, Bases and Salts
26 questions
Q1
A farmer was unhappy because of his low crop yield. He discussed the problem with an agricultural scientist and realised that the soil of his field was either too acidic or too basic. What remedy would you suggest the farmer to neutralise the soil?
Q2
You are provided with four test tubes containing sugar solution, baking soda solution, tamarind solution, salt solution. Write down an activity to find the nature (acidic/basic/ neutral) of each solution.
Q3
You are provided with three test tubes A, B and C as shown in figure with different liquids. What will you observe when you put
(a) a piece of blue litmus paper in each test tube
(b) a piece of red litmus paper in each test tube
(c) a few drops of phenolphthalein solution to each test tube?
View all question(a) a piece of blue litmus paper in each test tube
(b) a piece of red litmus paper in each test tube
(c) a few drops of phenolphthalein solution to each test tube?
6
Chapter 6: Physical and Chemical Changes
22 questions
7
Chapter 7: Weather, Climate and Adaptations of Animals to Climate
21 questions
8
Chapter 8: Winds, Storms and Cyclones
22 questions
9
Chapter 9: Soil
20 questions
10
Chapter 10: Respiration in Organisms
20 questions
11
Chapter 11: Transportation in Animals and Plants
21 questions
12
Chapter 12: Reproduction in Plants
20 questions
13
Chapter 13: Motion and Time
20 questions
14
Chapter 14: Electric Current and Its Effects
20 questions
15
Chapter 15: Light
24 questions
16
Chapter 16: Water: A Precious Resource
25 questions
17
Chapter 17: Forests: Our Lifeline
25 questions
18
Chapter 18: Wastewater Story
27 questions
Question
Easy
Solving time: 2 mins
You are provided with four test tubes containing sugar solution, baking soda solution, tamarind solution, salt solution. Write down an activity to find the nature (acidic/basic/ neutral) of each solution.
Views: 5,338 students
Text solution
Verified
Add blue litmus arrangement and afterward red litmus arrangement and note down the adjustment of variety.
Sugar arrangement - No adjustment of shade of blue or red litmus arrangement.
Baking soda solution: Blue Litmus turns red. Solution of tamarind – Makes the blue litmus red. Salt solution: neither the blue nor the red litmus solutions changed color.
Therefore, the solution of sugar and salt is neutral; the solution of baking soda is basic; the solution of tamarind is acidic.
Sugar arrangement - No adjustment of shade of blue or red litmus arrangement.
Baking soda solution: Blue Litmus turns red. Solution of tamarind – Makes the blue litmus red. Salt solution: neither the blue nor the red litmus solutions changed color.
Therefore, the solution of sugar and salt is neutral; the solution of baking soda is basic; the solution of tamarind is acidic.
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Practice more questions from Science Exemplar Problem Class 7
Q1
A farmer was unhappy because of his low crop yield. He discussed the problem with an agricultural scientist and realised that the soil of his field was either too acidic or too basic. What remedy would you suggest the farmer to neutralise the soil?
Q2
You are provided with four test tubes containing sugar solution, baking soda solution, tamarind solution, salt solution. Write down an activity to find the nature (acidic/basic/ neutral) of each solution.
Q3
You are provided with three test tubes A, B and C as shown in figure with different liquids. What will you observe when you put
(a) a piece of blue litmus paper in each test tube
(b) a piece of red litmus paper in each test tube
(c) a few drops of phenolphthalein solution to each test tube?
View all(a) a piece of blue litmus paper in each test tube
(b) a piece of red litmus paper in each test tube
(c) a few drops of phenolphthalein solution to each test tube?
Practice questions from Science Exemplar Problem Class 7
Question 1
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Question 2
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Question 3
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Question 4
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Practice more questions from Acids, Bases And Salts
Question 1
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Hydrochloric acid + Sodium hydroxide (base) → Sodium chloride (salt) + Water Sodium chloride formed in this reaction remains in solution form. Can we get solid sodium chloride from this solution? Suggest a method (if any).
Question 2
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Question 3
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(a) All substances are either acidic or basic.
(b) A compound if acidic will turn all indicators red.
(c) Lime water turns red litmus blue.
(d) Common salt dissolved in water turns blue litmus red.
(e) Phenolphthalein is a natural indicator.
(f) Calamine can be used to treat ant’s sting.
(g) Lemon water is basic in nature.
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| Question Text | You are provided with four test tubes containing sugar solution, baking soda solution, tamarind solution, salt solution. Write down an activity to find the nature (acidic/basic/ neutral) of each solution. |
| Topic | Acids, Bases And Salts |
| Subject | Science |
| Class | Class 7 |
| Answer Type | Text solution:1 |
| Upvotes | 53 |
