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प्रश्न
What is observed in performing the following :
| Hydrogen | Oxygen | Carbon dioxide | Chlorine | |
| Litmus test | ||||
| Apply a burning splint to the gas | ||||
| Colour of gas | colourless | colourless | colourless | greenish-yellow |
| Odour of gas |
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उत्तर
| Hydrogen | Oxygen | Carbon dioxide | Chlorine | |
| Litmus test | Neutral | Neutral | Acidic | Acidic |
| Apply a burning splint to the gas | Pale blue flame | rekindles a glowing wooden splinter. | moist blue litmus faint red | White precipitate |
| Colour of gas | colourless | colourless | colourless | greenish-yellow |
| Odour of gas | Odourless | Odourless | Odourless | Pungent, choking |
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संबंधित प्रश्न
What are chemical reactions?
Differentiate between in Chemical reaction and chemical equation.
Write true or false .
A black residue is formed when sugar is heated .
Give an example of a reaction where the following are involved
Electricity
Write your observation and a balanced equation in the case of the following substances being heated.
Copper carbonate.
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A white solid which evolves two colourless gases which on cooling combine and condense on the cooler parts of the test tube.
Complete the table given below.
| Addition of dil. H2SO4 to zinc | Test for gas evolved |
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Water boiling into water vapour is an example of chemical change.
What is thermochemical reactions?
