Indicators are substances that change colour when they are added to acidic or alkaline solutions. Litmus, phenolphthalein, and methyl orange are all indicators that are commonly used in the laboratory.
Chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.
Subsequently, What is an indicator Class 7?
Class 7 Chemistry Acids, Bases and Salts. Indicators. Indicators. Substances that are used to indicate whether a substance is acid or a base are known as indicators. They change their colour on addition of a solution containing an acidic or a basic substance.
Also, What is an indicator Short answer?
Indicators are substances whose solutions change color due to changes in pH. … They are usually weak acids or bases, but their conjugate base or acid forms have different colors due to differences in their absorption spectra.
What is an indicator in science?
Chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.
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What is indicator in simple words?
Indicators are substances whose solutions change color due to changes in pH. … They are usually weak acids or bases, but their conjugate base or acid forms have different colors due to differences in their absorption spectra.
What is an indicator in a titration?
Indicator: A substance that changes color in response to a chemical change. An acid–base indicator (e.g., phenolphthalein) changes color depending on the pH. … A drop of indicator solution is added to the titration at the beginning; the endpoint has been reached when the color changes.
What is an indicator in sociology?
An indicator provides a measure of a concept, and is typically used in quantitative research. … Sociologists use indicators to tap concepts that are less directly quantifiable, such as job satisfaction.
What do you mean by indicators?
Indicators are substances whose solutions change color due to changes in pH. … They are usually weak acids or bases, but their conjugate base or acid forms have different colors due to differences in their absorption spectra.
What are different types of indicators?
– Trend indicators. These technical indicators measure the direction and strength of a trend by comparing prices to an established baseline. …
– Momentum indicators. …
– Volatility Indicators. …
– Volume Indicators.
What is an indicator in chemistry?
Chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.
What is an indicator in social research?
An indicator is an observable and measurable entity that serves to define a concept in a practical way. For example, an intelligence test is used as an indication of intelligence. The indicator is linked to the concept by rules that are known as operationalisations.
What do you mean by indicator Class 10?
Indicators: Indicators are those substances which tell us whether a substance is acidic or basic by change in colour. For e.g., litmus solution. • Olfactory indicators: Those substances whose odour changes in acidic or basic media are called lfactory indicators. For e.g., clove, vanilla, onion.
What are the types of indicators?
– Input indicators. These indicators refer to the resources needed for the implementation of an activity or intervention. …
– Process and output indicators. Process indicators refer to indicators to measure whether planned activities took place. …
– Outcome indicators. …
– Impact indicators.
What are indicators simple definition?
Chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.
What is called indicator?
Indicators are substances whose solutions change color due to changes in pH. … They are usually weak acids or bases, but their conjugate base or acid forms have different colors due to differences in their absorption spectra.
What is an indicator Class 10?
Indicators: Indicators are those substances which tell us whether a substance is acidic or basic by change in colour. For e.g., litmus solution. • Olfactory indicators: Those substances whose odour changes in acidic or basic media are called lfactory indicators. For e.g., clove, vanilla, onion.
What are natural 10th indicators?
Natural Indicator is a type of indicator that can be found naturally and can determine whether the substance is an acidic substance or a basic substance. Some examples of natural indicators are red cabbage, turmeric, grape juice, turnip skin, curry powder, cherries, beetroots, onion, tomato, etc.
What are the three types of indicators?
Indicators can be described as three types—outcome, process or structure – as first proposed by Avedis Donabedian (1966). The national safety and quality indicators of safety and quality in health care recommended in this report include indicators of all three types.
What are some examples of social indicators?
Examples of objective social indicators include unemployment rates, crime rates, estimates of life expectancy, health status indexes such as the average number of “healthy” days (or days without activity limitations) in the past month for a specific population, school enrollment rates, average achievement scores on a …
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