Class 10 Exam > Class 10 Notes > Science Class 10 > PH Scale: Indicators & Its Types
PH Scale: Indicators & Its Types | Science Class 10 PDF Download
| Table of contents |
|
| Indicators |
|
| Table: Indicator Change in Acidic Medium |
|
| Table: Indicator Change in Basic Medium |
|
| Some Solved Questions |
|
Indicators
The substances that show different colours in different mediums or the substances that are used to distinguish between an acid and base are called indicators.
ph Scale
Types of Indicators
1. Natural Indicators: The indicators obtained from plants are called natural indicators.
(a) Litmus
- Litmus is a natural indicator which is extracted from “Lichens”, a plant belonging to thallophyta group. It is purple in colour. The pH range for litmus is 4.5 - 8.3 at room temperature.
- There are 2 types of litmus solution:
(i) Red Litmus: It is obtained by acidifying purple litmus extract
(ii) Blue Litmus: It is obtained by making purple litmus extract alkaline
In the laboratory litmus is available in the form of litmus paper; Red litmus and blue litmus paper.
Red and Blue Litmus Paper
(b) Turmeric
- It is yellow in colour and turns red in the base and remains yellow in acids.
2. Synthetic Indicators: These indicators are manufactured in laboratories.
(a) Methyl Orange
- It is orange in colour and turns red in acids and yellow in the base.
(b) Phenolphthalein
- It is colourless and remains colourless in acids and turns pink in the base.
3. Olfactory Indicators: These indicators change their smell when dipped in acid and base.
(a) Onion Extracts
- Retains its smell in acid and loses in base.
(b) Vanilla Extracts
- Retains its smell in acid and loses in base.
Table: Indicator Change in Acidic Medium
Table: Indicator Change in Basic Medium
Some Solved Questions
Ques. What is an indicator?
Ans. An indicator is a dye that changes colour when it is put into an acid or a base. An indicator tells us whether a given substance is an acid or a base by change in its colour.
Ques. What is a universal indicator?
Ans. Universal indicator is a solution, which undergoes several colour, changes over a wide range of pH. The colour is used to ‘indicate’ pH directly. Universal indicators are usually mixtures of several indicators.
Ques. Name the common indicators used to test acid, bases and salts?
Ans. The three common indicators to test for acids and bases are
1) Litmus
2)Methyl Orange
3)Phenolphthalein
Ques.What are olfactory indicators. Give examples?
Ans. Those substances whose smell or odour changes in acidic or basic solution are called olfactory indicators.
Example: Onion and Vanilla extract
Ques. What is the colour of Phenolphthalein in acidic and basic medium?
Ans. It remains colourless in acids and turns pink in basic medium.
The document PH Scale: Indicators & Its Types | Science Class 10 is a part of the Class 10 Course Science Class 10.
All you need of Class 10 at this link: Class 10
|
85 videos|437 docs|75 tests
|
FAQs on PH Scale: Indicators & Its Types - Science Class 10
| 1. What is the pH scale and how is it related to indicators? |  |
Ans. The pH scale is a measure of the acidity or alkalinity of a solution. It ranges from 0 to 14, with 7 being neutral, values below 7 indicating acidity, and values above 7 indicating alkalinity. Indicators are substances that change color depending on the pH of the solution they are in. They are used to determine the pH of a solution by observing the color change of the indicator.
| 2. What are the different types of indicators? | |
Ans. There are several types of indicators, including litmus paper, phenolphthalein, bromothymol blue, methyl orange, and universal indicator. Litmus paper is a simple indicator that turns red in acidic solutions and blue in basic solutions. Phenolphthalein is colorless in acidic solutions and turns pink in basic solutions. Bromothymol blue is yellow in acidic solutions, green in neutral solutions, and blue in basic solutions. Methyl orange is red in acidic solutions and yellow in basic solutions. Universal indicator is a mixture of several indicators and can display a range of colors to indicate the pH of a solution.
| 3. How does an indicator change in an acidic medium? | |
Ans. In an acidic medium, indicators undergo a color change. For example, litmus paper turns red, phenolphthalein remains colorless, bromothymol blue turns yellow, methyl orange turns red, and universal indicator may display various colors depending on the pH.
| 4. How does an indicator change in a basic medium? | |
Ans. In a basic medium, indicators also undergo a color change. Litmus paper turns blue, phenolphthalein turns pink, bromothymol blue turns blue, methyl orange turns yellow, and universal indicator may display various colors depending on the pH.
| 5. How are indicators useful in determining the pH of a solution? | |
Ans. Indicators are useful in determining the pH of a solution because they provide a visual indication of the solution's acidity or alkalinity. By observing the color change of the indicator when added to the solution, one can determine the approximate pH of the solution. This is especially helpful when more precise instruments like pH meters are not available.
About this Document
|
1.3K Views |
|
4.71/5 Rating |
|
Nov 22, 2024 Last updated |
Document Description: PH Scale: Indicators & Its Types for Class 10 2024 is part of Science Class 10 preparation.
The notes and questions for PH Scale: Indicators & Its Types have been prepared according to the Class 10 exam syllabus. Information about PH Scale: Indicators & Its Types covers topics
like Indicators, Table: Indicator Change in Acidic Medium, Table: Indicator Change in Basic Medium, Some Solved Questions and PH Scale: Indicators & Its Types Example, for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for PH Scale: Indicators & Its Types.
Introduction of PH Scale: Indicators & Its Types in English is available as part of our Science Class 10
for Class 10 & PH Scale: Indicators & Its Types in Hindi for Science Class 10 course.
Download more important topics related with notes, lectures and mock test series for Class 10
Exam by signing up for free. Class 10: PH Scale: Indicators & Its Types | Science Class 10
Description
Full syllabus notes, lecture & questions for PH Scale: Indicators & Its Types | Science Class 10 - Class 10 | Plus excerises question with solution to help you revise complete syllabus for Science Class 10 | Best notes, free PDF download
Information about PH Scale: Indicators & Its Types
In this doc you can find the meaning of PH Scale: Indicators & Its Types defined & explained in the simplest way possible. Besides explaining types of
PH Scale: Indicators & Its Types theory, EduRev gives you an ample number of questions to practice PH Scale: Indicators & Its Types tests, examples and also practice Class 10
tests
|
Explore Courses for Class 10 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Important questions
,Viva Questions
,shortcuts and tricks
,Sample Paper
,Exam
,ppt
,Semester Notes
,video lectures
,mock tests for examination
,PH Scale: Indicators & Its Types | Science Class 10
,PH Scale: Indicators & Its Types | Science Class 10
,MCQs
,PH Scale: Indicators & Its Types | Science Class 10
,Objective type Questions
,past year papers
,Previous Year Questions with Solutions
,Free
,practice quizzes
,Extra Questions
,study material
,Summary
;
Additional Information about PH Scale: Indicators & Its Types for Class 10 Preparation
PH Scale: Indicators & Its Types Free PDF Download
The PH Scale: Indicators & Its Types is an invaluable resource that delves deep into the core of the Class 10 exam.
These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
With the help of these notes, you can grasp complex subjects quickly, revise important points easily,
and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner,
allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material,
or toppers' notes, this PDF has got you covered. Download the PH Scale: Indicators & Its Types now and kickstart your journey towards success in the Class 10 exam.
Importance of PH Scale: Indicators & Its Types
The importance of PH Scale: Indicators & Its Types cannot be overstated, especially for Class 10 aspirants.
This document holds the key to success in the Class 10 exam.
It offers a detailed understanding of the concept, providing invaluable insights into the topic.
By knowing the concepts well in advance, students can plan their preparation effectively.
Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.
PH Scale: Indicators & Its Types Notes
PH Scale: Indicators & Its Types Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to PH Scale: Indicators & Its Types.
It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation.
Practice papers and question papers enable you to assess your progress effectively.
Additionally, the paper analysis provides valuable tips for tackling the exam strategically.
Access to Toppers' notes gives you an edge in understanding complex concepts.
Whether you're a beginner or aiming for advanced proficiency, PH Scale: Indicators & Its Types Notes on EduRev are your ultimate resource for success.
PH Scale: Indicators & Its Types Class 10 Questions
The "PH Scale: Indicators & Its Types Class 10 Questions" guide is a valuable resource for all aspiring students preparing for the
Class 10 exam. It focuses on providing a wide range of practice questions to help students gauge
their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation.
The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level.
Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.
Study PH Scale: Indicators & Its Types on the App
Students of Class 10 can study PH Scale: Indicators & Its Types alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the PH Scale: Indicators & Its Types,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of PH Scale: Indicators & Its Types is prepared as per the latest Class 10 syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup