Organic chemistry : Alkanes quiz 3

written by gogorabei | June 8, 2023

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#1. (16) An element which is used in manufacturing car tires, black painting, polishes and printing ink.

a) divided nickel

a) divided nickel

b)Finely divided carbon

b)Finely divided carbon

c)divided iron

c)divided iron

d)copper

d)copper

#2. Give the scientific explanation for each of the following (17) Alkanes are considered as a homologous series because :

a)Bec. They have a general molecular formula ,the same chemical properties and graduated physical properties

a)Bec. They have a general molecular formula ,the same chemical properties and graduated physical properties

b)Bec. They have a general molecular formula ,the different chemical properties and graduated physical properties

b)Bec. They have a general molecular formula ,the different chemical properties and graduated physical properties

c)Bec. They have a general structural formula ,the same chemical properties and graduated physical properties

c)Bec. They have a general structural formula ,the same chemical properties and graduated physical properties

d)Bec. They some of them have a general molecular formula ,the same chemical properties and graduated physical properties

d)Bec. They some of them have a general molecular formula ,the same chemical properties and graduated physical properties

#3. (2) The difference in the boiling points of alkanes Give reasons.....

a)because the poiling point of alkanes increase with increasing molecular masses

a)because the poiling point of alkanes increase with increasing molecular masses

b)because the poiling point of alkanes decrease with increasing molecular masses

b)because the poiling point of alkanes decrease with increasing molecular masses

c)a)because the poiling point of alkanes increase with decreasing molecular masses

c)a)because the poiling point of alkanes increase with decreasing molecular masses

d)a)because the poiling point of alkanes decrease with decreasing molecular masses

d)a)because the poiling point of alkanes decrease with decreasing molecular masses