Question

Which of the following is not observed in a homologous series? Give reason

for your choice.

a) Change in chemical properties

b) Difference in -CH2 and 14u molecular mass

c) Gradation in physical properties

d) Same functional group

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Answer 1

Explanation:

If we write the unknown number in the nominator then we can solve this as any other equation

x100=220x100=220

Multiply both sides with 100

100⋅x100=100⋅220100⋅x100=100⋅220

x=20020x=20020

x=10x=10

If the unknown number is in the denominator we can use another method that involves the cross product. The cross product is the product of the numerator of one of the ratios and the denominator of the second ratio. The cross products of a proportion is always equal

If we again use the example with the cookie mix used above

201=402201=402

1⋅40=2⋅20=401⋅40=2⋅20=40

It is said that in a proportion if

xy=zwwherey,w≠0xy=zwwherey,w≠0

xw=yz

Answer 2

Answer:

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Explanation:

a. Change in chemical properties It does not occur due to the presence of the same functional group.