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How can you prepare Hydrogen in the labo...

How can you prepare Hydrogen in the laboratory by a simple experiment ? With which test do you confirm the presence of Hydrogen ?

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VGS PUBLICATION-BRILLIANT-ACIDS AND BASES-EXERCISE
  1. What changes in colour take place in the indicators Phenolphthalein an...

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  2. Record your observations when you test the following substances with t...

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  3. How can you prepare Hydrogen in the laboratory by a simple experiment ...

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  4. How do you prepare carbondioxide ? What substances do you need for its...

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  5. When is the solution made by mixing an acid and a base, a neutral solu...

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  6. What are your conclusions from the experiment done in the above questi...

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  7. Test the following salt substances with red litmus and blue litmus pap...

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  8. Collect some salt substances with the help of your teacher. Make their...

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  9. What acids are present in the following substances ? Collect the infor...

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  10. You are asked to find out the acids present in the substances? placed ...

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  11. Grapes, Palm oil, Amla (emblica fruit) and Urine are put before you. Y...

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  12. Write the names of some substances that contain bases that we use in o...

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  13. Methyl orange and Phenolphthalein are indicators. Collect the informat...

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  14. What sort of food do we eat ?

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  15. What kind of tastes do food substances we eat have?

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  16. Do you find any difference in the taste of a raw and a ripe fruit ?

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  17. Do substances change their taste when cooked ?

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  18. Add sugar to lemon juice. What change do you notice in the taste ?

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  19. Is there any difference in the taste of lemon juice without sugar ?

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  20. Do substances change colour when added to other substances ?

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