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प्रश्न
Complete the table given below.
| Flame test for calcium chloride | Acid used for flame test |
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उत्तर
| Flame test for calcium chloride | Acid used for flame test | Acid used is conc. HCl [Hydrochloric acid] |
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संबंधित प्रश्न
FILL IN THE BLANK
A .............. change is a temporary change.
What do you observe when :
an iron nail is kept in tap water for few days
Write true or false :
No new substance is formed during a chemical reaction.
When electric current is passed through acidulated water ______ of water takes place.
Name affects the acidified K2Cr2O7 paper and also turns lime water dirty milky.
Give reason for the following:
Even though rusting is an exothermic reaction, the heat evolved when an iron nail rusts is unnoticeable.
Higher order Thinking question
A very hot glass on putting in cold water cracks. What does this change indicate?
Which of the following are chemical changes?
(i) Decaying of wood
(ii) Burning of wood
(iii) Sawing of wood
(iv) Hammering of a nail into a piece of wood
Classify the following as physical or chemical properties
Most metal oxides form alkalis on interacting with water.
Beating an egg to make a cake is a ______.
