Question
Name the functional group present in each of the following compounds:
(i) HCOOH
(ii) C2H5CHO
Solution
(i) HCOOH
(ii) C2H5CHO
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Name the functional group present in each of the following compounds:
(i) HCOOH
(ii) C2H5CHO
(i) HCOOH
(ii) C2H5CHO
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The sky appears dark instead of blue to an astronaut. State its reason.
At higher altitudes, scattering of sunlight by the atmospheric particles is not prominent. Due to the absence of scattering, the sky appears dark to an astronaut.
Depletion of ozone in the ozone layer is a cause for our worry. Why?
Depletion of ozone layer will expose us to ultraviolet radiation which are very harmful to the organism and cause skin cancer and eye damage in human beings.
Name two decomposers operating in our ecosystem.
Bacteria and fungi are two decomposers operating in our ecosystem.
State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
Modern periodic law states that “Properties of elements are a periodic function of their atomic number”.
(i) There are 18 groups in the modern periodic table and
(ii) 7 periods in the modern periodic table.
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