Hillcrest High School - AS 91164 Bonding, Structure, Properties and Energy Changes.

Question 1

What type of reaction is shown in the diagram?

Accepted Answer

Endothermic

Question 2

How many bonded and non-bonded regions of electrons does this molecule have?

Accepted Answer

3 bonded and 1 non-bonded regions

Question 3

What is the molecular shape of this substance?

Accepted Answer

Bent

Question 4

Which of the following molecules is non-polar?

Accepted Answer

SO3

Question 5

What is the type of intermolecular bonding is present in a solution of H2O?

Accepted Answer

weak intermolecular

Question 6

How many valence electrons does the nitrogen atom have?

Accepted Answer

5

Question 7

How many bonded and non-bonded regions of electrons does this molecule have?

Accepted Answer

4 bonded and 0 non-bonded regions

Question 8

Which of the following substances is soluble in water?

Accepted Answer

NaCl

Question 9

1-D network solids like polyethene have low melting points.

Accepted Answer

True

Question 10

Metallic substances are malleable because they have ________ between the metal cations and the delocalized electrons.

Accepted Answer

non-directional bonding

Question 11

How many regions of negative charge/ electron density are surrounding the central sulfur atom?

Accepted Answer

6

Question 12

Molecular substances are hard.

Accepted Answer

False

Question 13

How many bonded and non-bonded regions of electrons does this molecule have?

Accepted Answer

2 bonded and 1 non-bonded regions

Question 14

Is this reaction endothermic or exothermic?

Accepted Answer

exothermic

Question 15

Which of the following substances will not conduct electricity?

Accepted Answer

NaCl(s)

Question 16

If a chemical reaction results in a decrease in temperature, we say the reaction is .......

Accepted Answer

Endothermic

Question 17

What is the molecular shape of this substance?

Accepted Answer

Trigonal pyramid

Question 18

Steam condensing to form liquid water is an endothermic process.

Accepted Answer

False

Question 19

A molecule is polar if its bond dipoles do not cancel.

Accepted Answer

True

Question 20

What is the molecular shape of this substance?

Accepted Answer

Bent

Question 21

Who's the best Chemistry teacher?

Accepted Answer

PY, PS, IC, PJ

Question 22

What is the molecular shape of this substance?

Accepted Answer

Tetrahedral

Question 23

Which of the following substances is a molecular solid?

Accepted Answer

S8

Question 24

Which of the following compounds has the highest melting point?

Accepted Answer

Graphite

Question 25

Which of the following substances is insoluble in water?

Accepted Answer

Ag

Question 26

Ice melting is an endothermic process.

Accepted Answer

True

Question 27

How many regions of negative charge/ electron density are surrounding the central oxygen atom?

Accepted Answer

4

Question 28

A molecule is non-polar if its bond dipoles do cancel.

Accepted Answer

True

Question 29

Which of the following substances has the lowest melting point?

Accepted Answer

H2

Question 30

If a chemical reaction results in an increase in temperature, we say the reaction is .......

Accepted Answer

exothermic

Question 31

How many valence electrons does the hydrogen atom have?

Accepted Answer

1

Question 32

What is the type of bonding in ZnCl2?

Accepted Answer

ionic

Question 33

Which of the following substances is soluble in hexane?

Accepted Answer

wax

Question 34

How many regions of negative charge/ electron density are surrounding the central carbon atom?

Accepted Answer

2

Question 35

Which of the following substances is an ionic solid?

Accepted Answer

NaCl

Question 36

Diamond and silicon dioxide (SiO2) have high melting points because they have strong...

Accepted Answer

covalent bonds.

Question 37

A substance is an electrical conductor if it contains...

Accepted Answer

mobile ions, mobile electrons

Question 38

Which label on the diagram indicates the enthalpy change for this reaction (∆rH)?

Accepted Answer

(c)

Question 39

What type of reaction is shown in the diagram?

Accepted Answer

exothermic

Question 40

Which of the following bonds is non-polar?

Accepted Answer

C- C

Question 41

What elements are the exception to the octet rule?

Accepted Answer

H, Be and B

Question 42

Which of the following molecules is non-polar?

Accepted Answer

CF4

Question 43

Is this reaction endothermic or exothermic?

Accepted Answer

endothermic

Question 44

Which of the following substances is a metallic solid?

Accepted Answer

Na(s)

Question 45

Which label on the diagram indicates the activation energy for this reaction?

Accepted Answer

(a)

Question 46

Which label on the diagram indicates the enthalpy change for this reaction (∆rH) ?

Accepted Answer

(c)

Question 47

Which of the following bonds is polar?

Accepted Answer

C - Cl

Question 48

How many valence electrons does the chlorine atom have?

Accepted Answer

7

Question 49

How many valence electrons does the carbon atom have?

Accepted Answer

4

Question 50

Which label on the diagram indicates the activation energy for this reaction?

Accepted Answer

(a)

Question 51

How many bonded and non-bonded regions of electrons does this molecule have?

Accepted Answer

2 bonded and 2 non-bonded regions

Question 52

What is the type of bonding in silver metal?

Accepted Answer

metallic

Question 53

Which of the following molecules is polar?

Accepted Answer

SO3, CH3F

Question 54

Which of the following substances is a 3-D giant covalent network solid?

Accepted Answer

Diamond

Question 55

Which of the following substances will conduct electricity?

Accepted Answer

Graphite

Question 56

A molecule is polar if its bond dipoles do cancel.

Accepted Answer

False

Question 57

How many regions of negative charge/ electron density are surrounding the central sulfur atom?

Accepted Answer

3

Question 58

Which of the following substances is a 2-D giant covalent network solid?

Accepted Answer

Graphite

Question 59

How many bonded and non-bonded regions of electrons does this molecule have?

Accepted Answer

3 bonded and 0 non-bonded regions

Question 60

Ionic substances can only conduct electricity if they are dissolved in water, or are melted to form a liquid.

Accepted Answer

True

Question 61

How many regions of negative charge/ electron density are surrounding the central nitrogen atom?

Accepted Answer

4

Hillcrest High School - AS 91164 Bonding, Structure, Properties and Energy Changes.

Questions 61

Hillcrest High School - AS 91164 Bonding, Structure, Properties and Energy Changes.

Questions 61