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In order to study saponification reactio...

In order to study saponification reaction we first prepare 20% solution of sodium hydroxide. If we record the temperature of this solution just afte radding sodium hydroxide flakes to water and also test its nature using litmus, it may be concluded that the process of making this solution is

A

exothermic and the solution is alkaline

B

endothermic and the solution is alkaline

C

endothermic and the solution is acidic

D

exothermic and the solution is acidic.

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MODERN PUBLICATION-CARBON AND ITS COMPOUNDS-EXERCISE
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  2. A student takes about 2 mL ethanoic acid in a dry test tube and adds a...

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  3. In order to study saponification reaction we first prepare 20% solutio...

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  4. A student prepared 20% sodium hydroxide solution in a beaker to studey...

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  5. Hard water is not available for an experiment. Some salts are given be...

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  6. What do we observe on pouring acetic acid on red and blue litmus paper...

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  7. A student takes about 4 mL of distilled water in four test tubes marke...

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  8. In the neighbourhood of your school, hard water required for an experi...

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  9. A student puts a drop of reaction mixture of a saponification reaction...

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  10. For preparing soap in the laboratory we requires an oil and a base. Wh...

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  11. How will you test in the laboratory, whether the given sample of water...

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  12. When a compound X in its aqueous from is added to acetic acid taken in...

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  13. Can we test hard water by using a detergent? Write one more method oth...

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  15. Write two tests you would perofrm to detec whether the given colourles...

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  16. Name two salts each of calcium and magnesium which make the water hard...

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  17. What happens when acetic acid is added in a solution of Na2CO3 in a te...

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  18. List two observations which you make when you add a pinch of sodium hy...

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  19. What do you observe when you drop a few drops of acetic acid to a test...

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  20. What do you observe when you drop a few drops of acetic acid to a test...

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