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प्रश्न
| Column A | Column B | ||
| i | eosin | 1 | losing hydrogen |
| ii | oxidation | 2 | synthetic indicator |
| 3 | losing oxygen | ||
| 4 | natural indicator |
उत्तर
| Column A | Answers | ||
| i | eosin | 2 | synthetic indicator |
| ii | oxidation | 1 | losing hydrogen |
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संबंधित प्रश्न
When acids react with metal, which gas is liberated?
Name one natural source of the following acids:
Lactic acid
Complete and balance the following chemical equations:
CuO (s) + HCI (aq) →
What happens when an acid reacts with a metal?
With the help of labelled diagrams, describe an activity to show that acids produce ions only in aqueous solutions.
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?
What ions are present in the solutions of following substances? (write the symbols only)
Nitric acid
Wasp stings can be treated with:
(a) baking soda
(b) vinegar
(c) washing soda
(d) milk of magnesia
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.
Name X and Y
What is the chemical name of bleaching powder?
Name a metal compound which has detergent properties (cleansing properties).
Explain the following:
Lead carbonate does not react with dilute HCl.
Magnesium hydroxides are used for treating _______
What is a neutralization reaction? Give an example.
A student added 10 g of calcium carbonate in a rigid container, secured it tightly and started to heat it. After some time, an increase in pressure was observed, the pressure reading was then noted at intervals of 5 mins and plotted against time, in a graph as shown below. During which time interval did maximum decomposition take place?
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
Which of the following is used for dissolution of gold?
______ & ______ metals do not react with HCl or HNO3.
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?
Give a balanced equation for the reaction:
Silver nitrate solution and sodium chloride solution.
