Advertisements
Advertisements
Question
From which plant is litmus paper or litmus solution obtained?
- Moss
- Rose
- Hibiscus
- Lichen
Advertisements
Solution
(d) Lichen.
Litmus is a water soluble mixture of different dyes extracted from lichens, especially Roccella tinctoria.
APPEARS IN
RELATED QUESTIONS
Why do HCl, HNO3, etc., show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character?
Write a word equation and then a balanced equation for the reaction taking place when:
Dilute sulphuric acid reacts with aluminium powder.
What is a neutralisation reaction? Explain with an example. Give the chemical equation of the reaction which takes place.
With the help of labelled diagrams, describe an activity to show that acids produce ions only in aqueous solutions.
A solution reacts with zinc granules to give a gas which burns with a ‘pop’ sound. The solution contains ______.
A first-aid manual suggests that vinegar should be used to treat wasp stings and baking soda for bee stings. What does this information tell you about the chemical nature of:
- wasp stings?
- bee stings?
What is the chemical formula of baking soda?
What would be the colour of litmus in a solution of sodium carbonate?
State the common and chemical names of the compound formed when plaster of Paris is mixed with water.
Acids turn blue litmus paper to ______.
A solution of NaCl
(i) will turn red litmus blue
(ii) will turn pH paper green
(iii) will turn blue litmus red
(iv) will not affect litmus
Egg shell is made up of ____________.
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
In an attempt to demonstrate electrical conductivity through an electrolyte, the apparatus setup. Which among the following statement(s) is(are) correct?
- Bulb will not glow because electrolyte is not acidic
- Bulb will glow because NaOH is a strong base and furnishes ions for conduction.
- Bulb will not glow because circuit is incomplete
- Bulb will not glow because it depends upon the type of electrolytic solution
Which of the following statements is not correct?
Which of the following statements is true for acids?
What happens when nitric acid is added to egg shell?
Vinegar is ______ in taste.
Give a balanced equation for the reaction:
Silver nitrate solution and sodium chloride solution.
