Indicators
Indicators: Overview
This topic elaborates on the indicators that are the substances used to indicate the nature as acidic, basic or neutral. A brief on acidic and basic nature is given here with the help of experiments. We will also study about the acid rain in detail.
Important Questions on Indicators
Methyl orange indicator shows red colour in an _____ medium.
Indicators that are synthesised in the laboratory are known as _____ indicators.
The synthetic indicator is a substance that is found naturally and can determine whether the substance is acidic or basic.
Which of the following is an example of synthetic indicator ?
A yellow stain of curry on a white cloth turns reddish brown when it comes in contact with soap. Why does it happen?
When moist litmus paper is placed in a test tube of this gas, it turns red.
A diatomic gas that turns moist litmus paper from blue to red. (chlorine/hydrogen)
A gas which turns moist red litmus paper blue.
What is the effect of dilute hydrochloric acid on the colour of the red litmus indicator?
What is the effect of dilute hydrochloric acid on the colour of the blue litmus indicator:
Which of the following substances are known to be the neutral substances?
Which of the following sources are used to extract the natural indicator - litmus?
The special type of substances used to test whether a substance is acidic or basic are known as _____.
When a strip of red litmus paper is dipped in the solution A, it remained red.
What is the possible nature of the solution A?
The colour of the litmus solution extracted from the lichen plant is _____.
Solutions of substances that show a different colour in acidic, basic and neutral solutions are called as _____.
Hibiscus flower is an example for natural indicator
What are indicators? Name any two indicators. Explain the effect of these indicators on acids and bases?
Indicators are substances which show change in colour when brought in contact with acid and bases.
