Q2 of 55 Page 1

What will we the color of the sky when it is observed from a place in the absence of any atmosphere?

When there is no atmosphere, there will be no dispersion of light and therefore, the color of the sky will be black when it is observed from a place in the absence of any atmosphere.


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1

Name the functional group present in each of the following organic compounds:

(i) C2H5Cl


(ii) C2H5OH

 3

Which class of chemical is linked to the decrease in the decrease in the amount of ozone in the upper atmosphere of the earth?

 4

List two advantages of vegetative reproduction practiced in case of an orange plant.

 5

How can the valency of an elements be determined if its electronic configuration is known? What will be the valency of an elements to atomic number 9 (nine)?