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प्रश्न
Phenolphthalein is a synthetic type of indicator.
विकल्प
True
False
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उत्तर
Phenolphthalein is a synthetic type of indicator - True
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संबंधित प्रश्न
Why does an aqueous solution of an acid conduct electricity?
Write a word equation and then a balanced equation for the reaction taking place when:
Dilute hydrochloric acid reacts with iron filings.
Give chemical equation of the reaction involved.
What happens when an acid reacts with a metal hydrogencarbonate? Write equation of the reaction which takes place.
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.
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 solution of the following substance? (write the symbols only)
Magnesium hydroxide
A first-aid manual suggests that vinegar should be used to treat wasp stings and baking soda for bee stings. What does this information tell you about the chemical nature of:
- wasp stings?
- bee stings?
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.
- Write the chemical equation of the reaction of metal X with
- hydrochloric acid, and
- sodium hydroxide solution.
What would be the colour of litmus in a solution of sodium carbonate?
What is the chemical formula of bleaching powder?
Magnesium hydroxides are used for treating _______
Acids turn blue litmus paper to ______.
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 are present in a dilute aqueous solution of hydrochloric acid?
A sulphate salt of Group 2 element of the Periodic Table is a white, soft substance which can be moulded into different shapes by making its dough. When this compound is left in open for some time, it becomes a solid mass and cannot be used for moulding purposes. Identify the sulphate salt. Why does it show such a behaviour? Give the reaction involved.
Can we taste acids and bases to identify them?
Write notes on the properties of acids.
Consider the following salt:
NH4X
If in salt NH4X, X is nitrate, then its solution will give what colour with a universal indicator? Why?
The metal that will not produce hydrogen gas when reacted with dilute acids.
