Advertisements
Advertisements
प्रश्न
The litmus paper or the litmus solution is obtained from ________ plant
(A) Moss
(B) Lichen
(C) Rose
(D) Hibiscus
Advertisements
उत्तर
Lichen
APPEARS IN
संबंधित प्रश्न
From which plant is litmus paper or litmus solution obtained?
- Moss
- Rose
- Hibiscus
- Lichen
What do we observe on pouring acetic acid on red and blue litmus papers?
(A) Red litmus remains red and blue litmus turns red.
(B) Red litmus turns blue and blue litmus remains blue.
(C) Red litmus turns blue and blue litmus turns red.
(D) Red litmus becomes colourless and blue litmus remains blue.
Complete and balance the followingchemicalequations:
NaHCO3 (S) + HCI (aq) →
Complete and balance the following chemical equations:
NaOH (aq) HCI (aq)→
On adding dilute hydrochloric acid to copper oxide powder, the solution formed is blue-green.
Predict the new compound formed which imparts a blue-green colour to solution.
On adding dilute hydrochloric acid to copper oxide powder, the solution formed is blue-green.
On the basis of the above reaction, what can you say about the nature of copper oxide?
A substance X which is used as an antacid reacts with dilute hydrochloric acid to produce a gas Y which is used in one type of fire-extinguisher. Name the substance X and gas Y. Write a balanced equation for the chemical reaction which takes place.
Wasp stings can be treated with:
(a) baking soda
(b) vinegar
(c) washing soda
(d) milk of magnesia
What is the chemical name of bleaching powder?
Is PbO2 a base or not? Comment.
Choose the correct alternative and rewrite the following sentence.
Phenolphthalein is ___________ type of indicator.
With the help of suitable examples explain the term neutralization and the formation of –
- acidic,
- basic and
- neutral salts
Egg shell is made up of ____________.
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
- The temperature of the solution increases
- The temperature of the solution decreases
- The temperature of the solution remains the same
- Salt formation takes place
Common salt besides being used in kitchen can also be used as the raw material for making
- washing soda
- bleaching powder
- baking soda
- slaked lime
Vinegar is ______ in taste.
Can we taste acids and bases to identify them?
Consider the following salt:
NH4X
If in salt NH4X, X is nitrate, then its solution will give what colour with a universal indicator? Why?
Consider the following salt:
\[\ce{ZCO3}\]
What would be the change in colour in blue litmus if \[\ce{ZCO3}\] is added to it and Z is potassium?
Some metals react with acids to produce salt and hydrogen gas. Illustrate it with an example. How will you test the presence of this gas?
