1.2    BONDING

 

Section A

 

For each of the questions only ONE of the lettered responses (A-D) is correct.

 

Select the correct response in each case and mark its code letter by connecting the dots as illustrated on the answer sheet.

 

 

2     Which one of the following compounds contains two ions with different electronic configurations?

 

A CaCl2

B MgF2

C MgO

@D NaCl

 

 

3     In which one of the following pairs do both compounds contain multiple bonds between atoms?

 

A BeCl2 and BCl3

B CCl4 and HCI

C SF6 and H2S

@D C2H4and CO2

 

 

4     In which one of the following substances is the carbon-carbon bond the shortest?

 

A ethane

@B ethene

C benzene

D polythene

 

6     Which one of the following substances is most polar?

 

A carbon dioxide

B chloromethane

@C hydrogen fluoride

D fluorine

 

 

 

 

 

 

 

 

 

7          Elements P and Q combine by ionic bonding.  P and Q most likely belong to the following groups in the Periodic Table.

 

      P           Q

 

A   I             I

B   I             II

C   I             VII

D   VI          VII