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While cooking, if the bottom of the vess...

While cooking, if the bottom of the vessel is getting blackened on the outside, it means that

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the fuel is not burning completely.
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Shyam was cooking potato curry on a chulha. To his surprise he observed that the copper vessel was getting blackened from outside. It may be due to:

A vessel of height 2d is half-filled with a liquid of refractive index sqrt(2) and the other half with a liquid of refractive index n. (The given liquids are immiscible). Then the apparent depth of the inner surface of the bottom of the vessel (neglecting the thickness of the bottom of the vessel) will be

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A conical vessel wihout a bottom stands on a table. A liquid is poured with the vessel & as soon as the level reaches h, the pressure of the liquid raises the vessel. The radius of the base of the vessel is R and half angle of the cone alpha and the weight of the vessel is W. What is the density of the liquid ?

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LAKHMIR SINGH & MANJIT KAUR-CARBON AND ITS COMPOUNDS-Exercise
  1. A mixture of oxygen and ethyne is burnt for welding. Can you tell why ...

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  2. How would you distinguish experimentally between an alcohol and a carb...

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  3. What are oxidising agents?

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  4. Would you be able to check if water is hard by using a detergent?

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  5. People use a variety of methods to wash clothes. Usually after adding ...

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  6. Ethane with the molecular formula C(2)H(6) has: (a) 6 covalent bonds...

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  7. Butanone is a four-carbon compound with the functional group

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  8. While cooking, if the bottom of the vessel is getting blackened on the...

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  9. Explain the nature of the covalent bond using the bond formation in CH...

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  10. Draw the electron dot structures for

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  11. What is a homologous series ? Explain with an example.

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  12. How can ethanol and ethanoic acid be differentiated on the basis of th...

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  13. Why does micelle formation take place when soap is added to water? Wil...

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  14. Why are carbon and its compounds used as fuels for most applications?

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  15. Explain the formation of scum when hard water is treated with soap.

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  16. What change will you observe if you test soap with litmus paper (red a...

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  17. What is hydrogenation? What is its industrial application?

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  18. Which of the following hydrocarbons undergo addition reactions: C(2)H...

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  19. Give a test that can be used to differentiate chemically between butte...

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  20. Explain the mechanism of the cleaning action of soaps.

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