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ACTIVITY-1 The following table shows the observation results of an experiment conducted in the class. Blue litmus Blue Red Red litmus Methyl orange Phenolphthalein Sample-1 Sample-2 Blue Red Light Yellow Light Pink Pink Colourless a) What properties do Sample-I and Sample -2 have? (2) b) Name two natural indicators that can be used in this experiment? (2) (one) c) Find the odd one from the following?
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ACTIVITY-1 The following table shows the observation results of an exp...
Properties of Sample-I and Sample-II:
- Sample-I: Sample-I turns blue litmus paper blue and phenolphthalein colorless. This indicates that Sample-I is acidic in nature.
- Sample-II: Sample-II turns blue litmus paper red and phenolphthalein pink. This indicates that Sample-II is basic in nature.
Natural indicators that can be used in this experiment:
- Turmeric: Turmeric can be used as a natural indicator as it changes its color from yellow to reddish-brown in the presence of bases.
- Red cabbage: Red cabbage can also be used as a natural indicator as it changes its color from purple to red in the presence of acids and from purple to green in the presence of bases.
The odd one out:
The odd one out from the given indicators is methyl orange. Methyl orange is a synthetic indicator, whereas the other indicators mentioned (blue litmus, red litmus, phenolphthalein, turmeric, and red cabbage) are natural indicators.
Explanation:
1. Blue litmus: Blue litmus paper is a natural indicator made from lichens. It turns red in the presence of acids and remains blue in the presence of bases.
2. Red litmus: Red litmus paper is also a natural indicator made from lichens. It turns blue in the presence of bases and remains red in the presence of acids.
3. Methyl orange: Methyl orange is a synthetic indicator used in chemistry labs. It changes its color from red to yellow in the presence of acids and from yellow to red in the presence of bases.
4. Phenolphthalein: Phenolphthalein is a synthetic indicator commonly used in titration experiments. It is colorless in acidic solutions and turns pink in basic solutions.
5. Turmeric: Turmeric is a natural indicator commonly found in households. It turns reddish-brown in the presence of bases and remains yellow in the presence of acids.
6. Red cabbage: Red cabbage is another natural indicator that can be easily prepared at home. It changes its color from purple to red in the presence of acids and from purple to green in the presence of bases.
In summary, all the indicators listed (except methyl orange) can be used to determine whether a substance is acidic or basic based on their color changes. Methyl orange, being a synthetic indicator, is the odd one out in this experiment.
- Sample-I: Sample-I turns blue litmus paper blue and phenolphthalein colorless. This indicates that Sample-I is acidic in nature.
- Sample-II: Sample-II turns blue litmus paper red and phenolphthalein pink. This indicates that Sample-II is basic in nature.
Natural indicators that can be used in this experiment:
- Turmeric: Turmeric can be used as a natural indicator as it changes its color from yellow to reddish-brown in the presence of bases.
- Red cabbage: Red cabbage can also be used as a natural indicator as it changes its color from purple to red in the presence of acids and from purple to green in the presence of bases.
The odd one out:
The odd one out from the given indicators is methyl orange. Methyl orange is a synthetic indicator, whereas the other indicators mentioned (blue litmus, red litmus, phenolphthalein, turmeric, and red cabbage) are natural indicators.
Explanation:
1. Blue litmus: Blue litmus paper is a natural indicator made from lichens. It turns red in the presence of acids and remains blue in the presence of bases.
2. Red litmus: Red litmus paper is also a natural indicator made from lichens. It turns blue in the presence of bases and remains red in the presence of acids.
3. Methyl orange: Methyl orange is a synthetic indicator used in chemistry labs. It changes its color from red to yellow in the presence of acids and from yellow to red in the presence of bases.
4. Phenolphthalein: Phenolphthalein is a synthetic indicator commonly used in titration experiments. It is colorless in acidic solutions and turns pink in basic solutions.
5. Turmeric: Turmeric is a natural indicator commonly found in households. It turns reddish-brown in the presence of bases and remains yellow in the presence of acids.
6. Red cabbage: Red cabbage is another natural indicator that can be easily prepared at home. It changes its color from purple to red in the presence of acids and from purple to green in the presence of bases.
In summary, all the indicators listed (except methyl orange) can be used to determine whether a substance is acidic or basic based on their color changes. Methyl orange, being a synthetic indicator, is the odd one out in this experiment.
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ACTIVITY-1 The following table shows the observation results of an experiment conducted in the class. Blue litmus Blue Red Red litmus Methyl orange Phenolphthalein Sample-1 Sample-2 Blue Red Light Yellow Light Pink Pink Colourless a) What properties do Sample-I and Sample -2 have? (2) b) Name two natural indicators that can be used in this experiment? (2) (one) c) Find the odd one from the following?
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ACTIVITY-1 The following table shows the observation results of an experiment conducted in the class. Blue litmus Blue Red Red litmus Methyl orange Phenolphthalein Sample-1 Sample-2 Blue Red Light Yellow Light Pink Pink Colourless a) What properties do Sample-I and Sample -2 have? (2) b) Name two natural indicators that can be used in this experiment? (2) (one) c) Find the odd one from the following? for Class 7 2024 is part of Class 7 preparation. The Question and answers have been prepared according to the Class 7 exam syllabus. Information about ACTIVITY-1 The following table shows the observation results of an experiment conducted in the class. Blue litmus Blue Red Red litmus Methyl orange Phenolphthalein Sample-1 Sample-2 Blue Red Light Yellow Light Pink Pink Colourless a) What properties do Sample-I and Sample -2 have? (2) b) Name two natural indicators that can be used in this experiment? (2) (one) c) Find the odd one from the following? covers all topics & solutions for Class 7 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for ACTIVITY-1 The following table shows the observation results of an experiment conducted in the class. Blue litmus Blue Red Red litmus Methyl orange Phenolphthalein Sample-1 Sample-2 Blue Red Light Yellow Light Pink Pink Colourless a) What properties do Sample-I and Sample -2 have? (2) b) Name two natural indicators that can be used in this experiment? (2) (one) c) Find the odd one from the following?.
ACTIVITY-1 The following table shows the observation results of an experiment conducted in the class. Blue litmus Blue Red Red litmus Methyl orange Phenolphthalein Sample-1 Sample-2 Blue Red Light Yellow Light Pink Pink Colourless a) What properties do Sample-I and Sample -2 have? (2) b) Name two natural indicators that can be used in this experiment? (2) (one) c) Find the odd one from the following? for Class 7 2024 is part of Class 7 preparation. The Question and answers have been prepared according to the Class 7 exam syllabus. Information about ACTIVITY-1 The following table shows the observation results of an experiment conducted in the class. Blue litmus Blue Red Red litmus Methyl orange Phenolphthalein Sample-1 Sample-2 Blue Red Light Yellow Light Pink Pink Colourless a) What properties do Sample-I and Sample -2 have? (2) b) Name two natural indicators that can be used in this experiment? (2) (one) c) Find the odd one from the following? covers all topics & solutions for Class 7 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for ACTIVITY-1 The following table shows the observation results of an experiment conducted in the class. Blue litmus Blue Red Red litmus Methyl orange Phenolphthalein Sample-1 Sample-2 Blue Red Light Yellow Light Pink Pink Colourless a) What properties do Sample-I and Sample -2 have? (2) b) Name two natural indicators that can be used in this experiment? (2) (one) c) Find the odd one from the following?.
Solutions for ACTIVITY-1 The following table shows the observation results of an experiment conducted in the class. Blue litmus Blue Red Red litmus Methyl orange Phenolphthalein Sample-1 Sample-2 Blue Red Light Yellow Light Pink Pink Colourless a) What properties do Sample-I and Sample -2 have? (2) b) Name two natural indicators that can be used in this experiment? (2) (one) c) Find the odd one from the following? in English & in Hindi are available as part of our courses for Class 7.
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