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Midterm Examination _ChemBio1

Total questions: 60

Worksheet time: 1hrs 4mins

Name
Class
Date
1.

Which of the following statements is NOT true?

a)

Life depends on chemistry

b)

Living things are composed of chemical compounds

c)

In order to understand biology, one must first understand the chemistry of life

d)

Chemistry and Biology are not intertwined.

2.

Name the 3 subatomic particles of an atom.

a)

Proteins

b)

Electrons

c)

Neutrons

d)

Protons

3.

Which statement is false in describing elements?

a)

Elements are pure substances

b)

We have less than 100 elements

c)

20-24 elements are found in living organisms

d)

Elements are made of the same type of atom

4.

Which of the following in not a compound?

a)

H2O

b)

O

c)

CO2

d)

NaCl

5.

Ionic bonds share electrons

a)

True

b)

False

6.

If an atom loses an electron, it will then have a ______ charge.

a)

positive

b)

negative

c)

no charge

7.

Covalent Bonds share electrons

a)

True

b)

False

8.

Polar molecules are

a)

cold molecules

b)

shared equally

c)

not shared equally

d)

have the same degree of attraction

9.

H2O Oxygen and Hydrogen share

a)

Polar ionic bond

b)

Non-polar Ionic bond

c)

Non-polar covalent bond

d)

Polar covalent bond

10.

Which of the following statements about water is false?

a)

Oxygen has a stronger attraction to electrons then hydrogen.

b)

Hydrogen has a slightly positive charge

c)

Oxygen has a slightly positive charge

d)

Water is an example of a polar covalent bond

11.

Non-polar covalent bonds share electrons equally.

a)

True

b)

False

12.

Which of the following does NOT describe a covalent bond?

a)

Share electrons.

b)

Can be solid, liquid, or gas at room temperature.

c)

Conduct electricity.

d)

Consist of a metal and a non-metal.

13.

What do we call an atom that has a charge?

a)

Ion

b)

Molecule

c)

Isotope

d)

Metal

14.

If Sodium (Na) and Chlorine (Cl) form a compound, it will be held together by...

a)

Metallic bonds

b)

Covalent bonds

c)

Polar bonds

d)

Ionic bonds

15.

Giving something as a gift is a good metaphor for what type of bond?

a)

Metallic

b)

Ionic

c)

Covalent

d)

Orbital

16.

When Potassium (K) forms a chemical bond with Iodine (I) it forms a(n) _______________________ compound.

a)

Metallic

b)

Ionic

c)

Covalent

d)

Polar

17.

Write a short paragraph that explains why atoms bond to each other.

a)

Ionic

b)

Covalent

c)

Polar

d)

Polar

18.

If an atom loses two electrons what charge will it have?

a)

+ 2

b)

- 2

c)

+1

d)

-1

19.

What is the number of valence electrons for Oxygen?

a)

8

b)

6

c)

2

d)

1

20.

What elements generally make an ionic bond?

a)

metal and nonmetal

b)

2 nonmetals

c)

2 nonmetals

d)

none of the above

21.

In chemical compounds, covalent bonds form when

a)

pairs of electrons are shared between two nonmetal atoms.

b)

the electronegativity difference between two atoms is very large.

c)

electrons are completely transferred between two metals.

d)

two nonmetal atoms are attracted to each other by opposite charges.

22.

What atom matches this electron configuration?

1s22s22p63s2

a)

Potassium

b)

Aluminum

c)

Magnesium

d)

Neon

23.

How many electrons can the first energy level hold?

a)

1

b)

2

c)

8

d)

10

24.

There are 4 different types of subshells s,p,d,f

a)

True

b)

False

25.

 What happens when an atom loses an electron?

a)

It becomes Negatively Charged

b)

It remains neutral because the proton also leaves.

c)

It becomes Positively Charged

d)

It stays the same.

26.

The number of _____ is most important in determining how an atoms will bond. 

a)

Neutrons

b)

Protons

c)

Valence Electrons

d)

Electron sin the innermost shell

27.

Soluble in Water

a)

Ionic

b)

Covalent

28.

High Melting & Boiling Points

a)

Covalent

b)

Ionic

29.

This prefix means 7

a)

but

b)

hept

c)

hex

d)

non

30.

propyl is a....

a)

three carbon chain

b)

three carbon side chain

c)

triple bond

31.

How many methyl groups are on the following molecule?

a)

1

b)

2

c)

3

d)

4

32.

How many carbons are in the longest chain?

a)

7

b)

8

c)

9

d)

10

33.

What group(s) is/are found on the following molecule?

a)

methyl

b)

ethyl

c)

butyl

d)

methyl and butyl

e)

all of the above

34.

Name the following hydrocarbon

a)

cis-4-hexene

b)

trans-4-hexene

c)

trans-2-hexene

d)

cis-2-hexene

35.

What is the correct name for the alkyne shown?

a)

butyne

b)

1-butyne

c)

2-butyne

d)

1-methyl-1-propyne

36.

Which of the following compounds is an example of hydrocarbon?

a)

CO2

b)

C2H6

c)

C2H5OH

d)

CH3COOH

37.

Which of the following could contain a triple bond?

a)

C4H10

b)

C4H8

c)

C4H6

d)

C4H12

38.

Phenol is stronger acid than water and itself it is

a)

weakly acidic

b)

weakly basic

c)

alkali

d)

strong acid

39.

What is the molecular formula of Benzene?

a)

C6H12

b)

C6H6

c)

C6H10

d)

C8H8

40.

What is the functional group of alcohols?

a)

–NH2

b)

–COOH

c)

–CHO

d)

–OH

e)

–NO2

41.

Name the following compound

a)

Benzene

b)

Benzol

c)

Phenyl

d)

Phenol

42.

Which group will have the highest boiling points and melting points for similarly sized molecules?

a)

alkanes

b)

alkenes

c)

alcohols

d)

ethers

43.

Which of the following is not needed for the production of ethanol from fermentation?

a)

yeast

b)

oxygen

c)

carbohydrates

d)

warm temperature

44.

Which of these has the functional group -OH?

a)

alkanes

b)

alkenes

c)

alcohols

d)

carboxylic acids

45.

What is the general formula of alcohols?

a)

CnH2n+1COOH

b)

CnH2n+1OH

c)

CnH2n+2

d)

CnH2n

46.

Name this compound...

a)

methane

b)

methene

c)

methanol

d)

methoxymethane

47.

What is the molecular formula of propanol?

a)

C3H8O

b)

C3H7O

c)

C2H6O

d)

C4H10O

48.

Select all of these following that are methods to make ethanol.

a)

Dehydration of ethene

b)

Addition of water to ethene

c)

Fermentation of sugars with yeast

d)

Distillation of sugars

49.

What family of compounds does ethanol belong to?

a)

alkanes

b)

alkenes

c)

alcohols

d)

carboxylic acids

50.

Molecule with the same molecular structure but different structural formula is known as __________

a)

fats

b)

lipids

c)

Oil

d)

Isomers

51.

It is an organic compound consisting of hydrogen and carbon.

(a)  

52.

This type of hydrocarbons are usually colorless and odorless

(a)  

53.

What type of alcohol contains three hydroxyl groups?

(a)  

54.

Chemical compounds found in plants that are used as flavorings and aromas

(a)  

55.

The simplest hydrocarbons .

(a)  

56.

Discuss fully the process of carbon and hydrogen detection (15 pts)

4 lines
57.

Enumerate the different types of Organic Formula (5pts)

4 lines
58.

Differentiate ionic and covalent bond (5 pts).

4 lines
59.

Enumerate and draw different shapes used in VSEPR Theory (10 points)

60.

Give different physiological impacts of alcohols and phenols (10 pts).

4 lines

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