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प्रश्न
Phenolphthalein is a synthetic type of indicator.
विकल्प
True
False
उत्तर
Phenolphthalein is a synthetic type of indicator - True
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संबंधित प्रश्न
When acids react with metal, which gas is liberated?
How is the concentration of hydronium ions (H3O+) affected when a solution of an acid is diluted?
Complete and balance the followingchemicalequations:
NaHCO3 (S) + HCI (aq) →
Complete and balance the following chemical equations:
CuO (s) + HCI (aq) →
Fill in the blank in the following sentences:
Substances do not show their acidic properties without.......................... .
What happens when an acid reacts with a metal?
What happens when an acid reacts with a metal oxide? Explain with the help of an example. Write a balanced equation for the reaction involved.
With the help of labelled diagrams, describe an activity to show that acids produce ions only in aqueous solutions.
Define an acid and a base. Give two examples of each.
Hydrochloric acid reacts with a metal X to form a gas Y which burns with a 'pop' sound. Sodium hydroxide solution also reacts with the same metal X (on heating) to form the same gas Y.
Write the chemical equation of the reaction of metal X with (i) hydrochloric acid, and (ii) sodium hydroxide solution.
Write the chemical formula of sodium carbonate decahydrate.
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
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
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
Which of the following statements is true for acids?
“All acids contain one or more hydrogen atoms, but not all substances containing hydrogen are acids.” Support this statement with examples.
The formula of bleaching powder is ______.
On placing a copper coin in a test tube containing green ferrous sulphate solution, it will be observed that the ferrous sulphate solution ______.
