Advertisements
Advertisements
Question
Name the acid-base indicator extracted from lichen.
Solution
A purple dye is extracted from a plant called lichen. This dye is called a litmus solution and is commonly used as an indicator.
APPEARS IN
RELATED QUESTIONS
Give two examples each of organic acids and mineral acids.
Which chemical is injected into the skin of a person during an ant's sting?
How can the effect of these stings be neutralised?
Write the neutralisation reaction between acids and bases in terms of the ions involved.
Write any two important uses of bases.
It has been found that rubbing vinegar on the stung area of the skin of a person gives him relief. The person has been stung by:
(a) wasp
(b) ant
(c) honey bee
(d) nettle leaf hair
HCl, HNO3, C2H5OH, C6H12O6 all contain H atoms but only HCl and HNO3 show acidic character. Why?
Write a balanced reaction for the following conversions (A, B, C, D)
\[\ce{Fe→[A]FeCl2 →[B]FeCO3→[C]Fe(NO3)2→[D]Fe(OH)2}\]
Which of the following is acidic in nature?
Paheli is suffering from indigestion due to acidity. Is it advisable to give her orange juice in this situation and why?
Match the substances in Column I with those in Column II.
| Column 1 | Column II | ||
| (a) | Tartaric acid | (i) | soap |
| (b) | Calcium hydroxide | (ii) | curd |
| (c) | Formic acid | (iii) | unripe mangoes |
| (d) | Sodium hydroxide | (iv) | ant’s sting |
| (e) | Lactic acid | (v) | lime water |
