QUIZ 2.3 - CARBON: ITS NATURE AND COMPOUND

How do carbon atoms form many organic compounds?

• By attracting other elements toward themselves to form the bonds

• By forming many bonds with other carbon atoms and other elements

• By sharing their electrons with other metal and non-metal elements

• By transferring their electrons to the atoms of surrounding elements

What is the maximum number of bonds can a carbon atom form?

• 1

• 2

• 4

• 8

Organic chemistry is broadly defined as __________

• the chemistry of metallic compounds

• the chemistry of substances produced by living organisms

• the chemistry of the compounds that contain carbon and hydrogen

• all of the choices

What makes carbon such a unique element?

• Elemental carbon comes in two forms, diamond and graphite.

• Carbon forms four bonds, although the ground state configuration would predict the formation of fewer bonds.

• Carbon forms covalent bonds rather than ionic bonds.

• To a greater extent than any other element, carbon can bond to itself to form straight chains, branched chains and rings

Which are TRUE about organic compounds?

I. organic compounds contain calcium

II. organic compounds contain carbon

III. organic compounds can be produced by living organisms

IV. organic compounds can be produced artificially

• I, II and III only

• I and III only

• II and III only

• II, III and IV only

Covalent compounds ____________________

• have high melting and boiling point

• are mostly soluble in water

• are formed between atoms of metals and non-metals

• are formed by the sharing of electrons in the bonding atoms

Which of the following statements are correct for carbon compounds?

(i) Most carbon compounds are good conductors of electricity.

(ii) Most carbon compounds are poor conductors of electricity.

(iii) Force of attraction between molecules of carbon compounds is not very strong.

(iv) Force of attraction between molecules of carbon compounds is very strong.

• (ii) and (iv)

• (ii) and (iii)

• (i) and (iv)

• (i) and (iii)

Marcy’s car stopped at the middle of the road. She found out that her car has ran out of fuel. Which compound must she buy?

• kerosene

• lubricating oil

• gasoline

• water

Juan Victor’s grandmother was cooking their supper when she suddenly stopped and said, “Oh, the tank is already empty!” Then her grandmother asked hi m to buy another tank. What did Victor’s grandmother asks him to buy?

• gasoline

• lubricating oil

• water

• liquefied petroleum gas (LPG)

Why is it important to know the properties of common liquid materials?

• To know the uses of the liquids

• To know possible danger from these kind of material

• To know how these liquids affect people

• all of the above