False.
Na does represent sodium, but NOT when it lost an electron. Na+ represents sdoium when it lost its electron.
Answer:
Option A=> -NHCOCH3 and option C = -CH3.
Explanation:
The option A that is -NHCOCH3 is CORRECT because it possesses lone pair of electron with the exception of group 7A elements. It is this lone pair that is used in the Activation of the ring towards substitution. Other groups that falls into this group are; OCH3, alkyls and many others.
Option B that is -COOH is good group for withdrawal of electron through Resonance. Other examples are NO2, -CN and SO3H.
Option C falls to the same category as option A above that is Activation of the ring towards substitution.
Option D falls to the same category as option B above that is group for withdrawal of electron through Resonance.
Answer:
c- dry cells can not be recharged
Attraction between a cation in one element and an anion in the other element
Melting can be best described as a process in which molecules gain enough kinetic energy to be able to pass to each other.
