1. Which formula represents a compound different from the other two? Select one:

Question

1.

Which formula represents a compound different from the other two?

Select one:

a. CH3CH2CH2CH3

b. CH3(CH2)2CH3

c. CH3CH(CH3)2

d. No correct answer given

2.The most common geometric arrangement of bonds about a carbon atom is

Select one:

a. bent

b. planar

c. tetrahedral

d. linear

7. The parent substance of the aromatic hydrocarbons is

Select one:

a. toluene

b. phenol

c. benzene

d. aniline

9.An open chain hydrocarbon of the formula C7H10 can have in its formula

Select one:

a. one carbon to carbon triple bond.

b. one carbon to carbon double bond and one carbon to carbon triple bond.

c. two carbon to carbon double bonds.

d. One carbon to carbon double bond.

10. Which is an incorrect formula?

Select one:

a. CH3CHBr=CH2

b. CH3CH=CHCH2Br

c. CH2BrCH2CH2Br

d. CH3CH2CH2Br

11. Alkenes and alkynes are both unsaturated hydrocarbons.

Select one:

True

False

12. Which of the following is an alkane?

Select one:

a. C6H6

b. C6H12

c. C6H14

d. C6H10

13. Alkane molecules have little intermolecular attraction and therefore relatively low boiling points.

Select one:

True

False

16. The formula for isobutane is (CH3)2CHCH3.

Select one:

True

False

19. The main type of bonding in organic compounds is ionic.

Select one:

True

False

20. The number of covalent bonds a carbon atom forms is generally

Select one:

a. 6

b. 2

c. 8

d. 4

Explanation / Answer

1- b (in this structure valancey of carbon aton does'nt meet)

2- c (because the C has valency of 4)

7- c (benzene is the main aromatic parent hydrocarbon)

9- b

10- a (valencey of C atom in this structure is 5)

11- True

12- c (Formula for alkane is CnHn+2)

13- True

16- True

19- False (since they are mostly covalent)

20- d (because the C has valency of 4)

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