EASY
10th CBSE
IMPORTANT
Earn 100
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 a solution. (Copper (II) chloride / Copper sulphate / Copper(I) chloride)
50% studentsanswered this correctly
Important Questions on Acids, Bases And Salts
MEDIUM
10th CBSE
IMPORTANT
On adding dilute hydrochloric acid to copper oxide powder, the solution formed is blue-green. Write a balanced chemical equation of the reaction which takes place.
EASY
10th CBSE
IMPORTANT
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?
EASY
10th CBSE
IMPORTANT
A white shirt has a yellow stain of curry. When soap is rubbed on this shirt during washing, the yellow stain turns reddish-brown.
On rinsing the shirt with plenty of water, the reddish-brown stain turns yellow again. Name the natural indicator present in curry stain.
(Grape juice/ Turmeric/ Beetroot)
MEDIUM
10th CBSE
IMPORTANT
A white shirt has a yellow stain of curry. When soap is rubbed on this shirt during washing, the yellow stain turns reddish-brown. On rinsing the shirt with plenty of water, the reddish-brown stain turns yellow again
Explain the changes in the colour of this indicator which take place during washing and rinsing the shirt.
HARD
10th CBSE
IMPORTANT
A white shirt has a yellow stain of curry. When soap is rubbed on this shirt during washing, the yellow stain turns reddish-brown. On rinsing the shirt with plenty of water, the reddish-brown stain turns yellow again. What is the nature of soap (acidic/basic) as shown by the indicator present in curry stain?
EASY
10th CBSE
IMPORTANT
You have been provided with three test-tubes. One of these test-tubes contains distilled water, and the other two contain an acidic and a basic solution, respectively. If you are given only blue litmus paper, how will you identify the contents of each test-tube?
MEDIUM
10th CBSE
IMPORTANT
A substance 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 and gas . Write a balanced equation for the chemical reaction, which takes place.
MEDIUM
10th CBSE
IMPORTANT
How is the neutralisation of carbonate with an acid different from the neutralisation of an oxide or a hydroxide?
