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प्रश्न
Complete the table given below.
| Addition of dil. H2SO4 to zinc | Test for gas evolved |
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उत्तर
| Addition of dil. H2SO4 to zinc | Test for gas evolved | The gas [H2] evolved burns with 'pop' sound and burns with pale blue flame |
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संबंधित प्रश्न
Give one example that illustrates the following characteristics of a chemical reaction:
Change in state
How do the following help in bringing about a chemical change?
heat.
Fill in the blank
A change in which the substance can be brought back to its original state is called a _______ change.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Sodium chloride
Distinguish by heating the following in dry test tubs.
Copper Sulphate and copper carbonate
Give a balanced equation for the conversion of a soluble lead salt to an insoluble lead salt – formed as a white precipitate.
Explain with the help of balanced equations, how precipitation reactions are used for identifying the positive radicals in three different salts, each having a different cation [positive ion].
Complete the statement by filling in the blank with the correct word:
The reddish-brown precipitate obtained during a double decomposition precipitation reaction between an iron salt and alkali is __________.
Higher order Thinking question
Peeled and unpeeled banana does not look the same. Does that mean peeling banana is a chemical change?
The reaction of H2 gas with oxygen gas to form water is an example of ______.
