Advertisements
Advertisements
प्रश्न
Name the source from which litmus solution is obtained. What is the use of this solution?
Advertisements
उत्तर
Litmus solution is derived from lichens and serves as an indicator. When removed, it appears bright purple. It turns blue when added to bases but red when introduced to acids.
It is used as an indicator to distinguish between acids and bases.
| Solution | Colour of the litmus solution |
| Acidic | Red |
| Basic | Blue |
| Neutral | No change |
APPEARS IN
संबंधित प्रश्न
How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal?
One of the following does not inject an acidic liquid into the skin through its sting. This is:
(a) honey bee
(b) ant
(c) wasp
(d) nettle leaf hair
One of the following salts will give an alkaline solution on dissolving in water. This is:
a) Na2CO3
(b) Na2SO4
(c) NaCl
(d) (NH4)2 SO4
The salt which will give a neutral solution on dissolving in water will be:
(a) CH3COONa
(b) NH4Cl
(c) KCl
(d) Na2CO3
Name the acid present in vinegar.
By squeezing lemon on a piece of rock the gas liberated turned lime water milky. which compound is present in the rock?
Fill in the missing data in the following table
| Name of the salt | Formula | Salt obtained from | ||
| Base | Acid | |||
| (i) | Ammonium chloride | NH4Cl | NH4OH | ______ |
| (ii) | Copper sulphate | ______ | ______ | H2SO4 |
| (iii) | Sodium chloride | NaCl | NaOH | ______ |
| (iv) | Magnesium nitrate | Mg(NO3)2 | ______ | HNO3 |
| (v) | Potassium sulphate | K2SO4 | ______ | ______ |
| (vi) |
Calcium nitrate | Ca(NO3)2 | Ca(OH)2 | ______ |
State whether the following statement is true or false. Correct the false statement.
Lemon water is basic in nature.
While playing in a park, a child was stung by a wasp. Some elders suggested applying paste of baking soda and others lemon juice as remedy. Which remedy do you think is appropriate and why?
What are acids?
