chemistry practice test 1 start 1 2 3 4

8/7/2019 Chemistry Practice Test 1 Start 1 2 3 4

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Chemistry Practice Test 1 Start1234

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1. Bases taste sour and are corrosive to metals.

1. True

2. False

Question 11 78495 1 1

select the correc radiobuttons A

A. True B. False

Score: 0 / 1Submitted: 6/3/201011:39 AM

1.The following model answer has been provided to you by the grader. Carefully compareyour answer with the one provided here.

The answer is B.

Iron(II) oxide is an example of a base.

1. True

2. False

Question 21 78498 1 1


A. True B. False


The following model answer has been provided to you by the grader. Carefully compareyour answer with the one provided here.

The answer is A.

Give the product(s) of the reaction below.
http://users.caribbeanexams.com/Pages/MainPage.aspx?cid=14769&epid=E2221334279http://users.caribbeanexams.com/Pages/MainPage.aspx?cid=14769&epid=E2221334279http://users.caribbeanexams.com/Pages/MainPage.aspx?cid=14769&epid=E1941020383http://users.caribbeanexams.com/Pages/MainPage.aspx?cid=14769&epid=E2362748340http://users.caribbeanexams.com/Pages/MainPage.aspx?cid=14769&epid=E2122121039http://users.caribbeanexams.com/Pages/MainPage.aspx?cid=14769&epid=E2132043626http://users.caribbeanexams.com/Pages/MainPage.aspx?cid=14769&epid=E1941020383http://users.caribbeanexams.com/Pages/MainPage.aspx?cid=14769&epid=E2362748340http://users.caribbeanexams.com/Pages/MainPage.aspx?cid=14769&epid=E2122121039http://users.caribbeanexams.com/Pages/MainPage.aspx?cid=14769&epid=E2132043626http://users.caribbeanexams.com/Pages/MainPage.aspx?cid=14769&epid=E2221334279


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1. CH3CH3

2. CH2OHCH2OH

3. CH3CH2OH

4. CH3COOH

Question 31 78501 1 1


A B C D



The answer is C.

Identify the pollutant that is not produced by the automobile combustion engine.

1. unburned hydrocarbons

2. CO

3. SO2

4. CO2+

Question 41 78504 1 1


A B C D



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The answer is C.Identify below one of the major sources of the pollutant sulphur dioxide.

1. power stations

2. motor vehicles

3. bauxite mining

4. limestone quarries

Question 51 78507 1 1


A B C D



The answer is A.

Glass is most often obtained from quartz. Quartz is a member of the ______ family.

1. aluminate

2. phosphate

3. carbonate

4. silicate

Question 61 78510 1 1


A B C D



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The answer is D.Choose the compound below that does not contain covalent bonds.

1. Na2S

2. CH4

3. NH3

4. HCl

Question 71 78513 1 1


A B C D



The answer is A.

Identify the nature of the following oxides: CO2, SO2 and NO2.

1. basic oxides

2. neutral oxides

3. amphoteric oxides

4. acidic oxides

Question 81 78516 1 1


A B C D



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The answer is D.Give the IUPAC name of the following organic molecule:

OHCH2CH2OH

1. ethylene glycol

2. ethanol

3. 1,2-ethenediol

4. 1,2-ethanediol

Question 91 78519 1 1


A B C D



The answer is D.

Which of these are organic compounds that can be represented by CnH2n+1OH as their general formula?

1. alkanes

2. alkenes

3. alcohols

4. esters

Question 101 78522 1 1




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A B C D


The answer is C.

Which of these are organic compounds that can be dehydrated to form alkenes?

1. alkanes

2. alcohols

3. organic acids

4. esters

Question 111 78528 1 1


A B C D

Score: 0 / 1Submitted: 6/3/2010 11:39AM

The following model answer has been provided to you by the grader. Carefully compare youranswer with the one provided here.

The answer is C.

Water has a pH of

1. 5.5

2. 7

3. 6.5

4. 7.5

Question 121 78531 1 1




7/44

A B C D


The answer is B.

An allotrope of carbon is

1. quartz.

2. graphite.

3. dolomite.

4. silicon.

Question 131 78534 1 1


A B C D



The answer is B.

The compounds formed when Ca(HCO3)2 is heated are

1. H2CO3 and CaO

2. CaCO3 and H2O

3. H2O and CaO

4. CaCO3, H2O and CO2

Question 141 78537 1 1




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A B C D


The answer is D.

CO2 is an acidic oxide because carbon is a member of period 2.

1. Both statements are true and the second statement is a correct explanation of the first.

2. Both statements are true but the second statement is nota correct explanation of the first.

3. The statements are false and true, respectively.

4. Both statements are false.

Question 151 78540 1 1


A B C D



The answer is B.

Ammonia is an example of an acid because acids turn blue litmus red.

1. Both statements are true and the second statement is a correct explanation of the first.




Question 161 78543 1 1




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A B C D


The answer is C.

Temporarily hard water is due to

1. hydrogen carbonates of Na and Ca.

2. carbonates of Mg and Ca.

3. sulphates of Mg and Ca.

4. hydrogen carbonates of Mg and Ca.

Question 171 78546 1 1


A B C D



The answer is D.

Identify the chemist responsible for the proposal of the Law of Conservation of Mass.

1. John Dalton

2. Antoine Lavoisier

3. James Chadwick

4. Daniel Rutherford

Question 181 78549 1 1




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A B C D


The answer is B.

Select the mixtures that are considered as heterogeneous mixtures.

1. sand in water

2. salt in water

3. potassium dichromate and iron filings

4. milk

1. II and III only

2. I and III only

3. I and IV only

4. II and IV only

Question 191 78552 1 1


A B C D

Score: 0 / 1Submitted: 6/3/2010 11:39

AM


The answer is B.

A compound was found to have an empirical formula of C3H8O. The molar mass of thecompound was found to be 60 g mol1. Give the molecular formula of the compound.

1. C3H8O

2. C6H8O

3. C6H16O2

4. C9H24O3


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Question 201 78555 1 1


A B C D

Score: 0 / 1

Submitted: 6/3/2010 11:39AM


The answer is A.


1 0 714

21. If an atom has 13 protons, 16 electrons, and 16 neutrons, what is its atomic mass?

1. 32

2. 45

3. 29

4. 16

Question 211 78562 1 1


A B C D

Score: 0 / 1Submitted: 6/3/2010 7:35PM

21.The following model answer has been provided to you by the grader. Carefully compareyour answer with the one provided here.

The answer is C.

Which of the following elements would you expect to be the most electronegative?

1. Fluorine


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2. Oxygen

3. Chlorine

4. Nitrogen

Question 221 78566 1 1


A B C D



The answer is A.

An element X has two isotopes: X13 and X19. If the atomic mass of X is 14.3, what is the relativeabundance of X13?

1. 22%

2. 19%

3. 78%

4. 81%

Question 231 78570 1 1


A B C D



The answer is C.

What is given off in an alpha particle emission reaction?

1. An electron


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2. High energy photons

3. A proton

4. A helium nucleus

Question 241 78574 1 1


A B C D



The answer is D.

Which of the following gases has the greatest volume at the same temperature and pressure?

1. 3 moles of oxygen gas

2. 3 moles of helium gas

3. 3 moles of hydrogen gas

4. They all have the same volume

Question 251 78578 1 1


A B C D



The answer is D.

If a vial contains 3 moles of hydrogen gas and 5 moles of oxygen gas and has a total pressure of 24 kPa,what would be the pressure in the vial if all the oxygen gas were removed?

1. 15 kPa


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2. 9 kPa

3. 12 kPa

4. 18 kPa

Question 261 78582 1 1


A B C D



The answer is B.

A gas collected over water at 50C has a pressure of 145 kPa. If the vapour pressure of water at 50C is13 kPa, what would be the pressure of the same collected gas when dried?

1. 132 kPa

2. 158 kPa

3. 145 kPa

4. 138 kPa

Question 271 78586 1 1


A B C D



The answer is A.

The graph below shows the temperature of a sample that starts as solid ice and has heat added to it overtime. Which line segment shows the time where the sample is purely liquid?


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1. W

2. Y

3. X

4. Z

Question 281 78590 1 1


A B C D

Score: 0 / 1Submitted: 6/3/2010 7:35

PM


The answer is C.

If 3 moles of sodium chloride are dissolved in 5 litres of water, what is the molarity of the sodium in this

solution?1. 0.30 M

2. 1.20 M

3. 0.60 M

4. 1.67 M


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Question 291 78594 1 1


A B C D

Score: 0 / 1

Submitted: 6/3/2010 7:35PM


The answer is C.

Which of the following elements would be expected to have the largest atomic radius?1. Calcium

2. Potassium

3. Bromine

4. Krypton

Question 301 78598 1 1


A B C D



The answer is B.


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31.If a solution has a hydrogen ion concentration [H+] = 3.2 103, then what is the pH ofthis solution?

1. 11.51


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2. 3.28

3. 10.72

4. 2.49

Question 311 78607 1 1


A B C D


31.


The answer is D.

If a solution has a hydrogen ion concentration [H+] = 6.4 102, then what is the pOH of this solution?

1. 1.19

2. 2.34

3. 12.81

4. 11.66

Question 321 78611 1 1


A B C D



The answer is C.

If a solution has a pH of 3.65 then what is the pOH of this solution?

1. 10.35


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2. 3.65

3. 2.61

4. 11.39

Question 331 78615 1 1


A B C D



The answer is A.

What is the oxidation number of nitrogen in Ca(NO3)2?

1. 3+

2. 5

3. 3

4. 5+

Question 341 78619 1 1


A B C D



The answer is D.

If a gas absorbs 200 kJ of heat and is compressed by its surroundings with 400 kJ of work, then what isthe free energy change of this gas?

1. +200 kJ


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2. +600 kJ

3. 200 kJ

4. 600 kJ

Question 351 78623 1 1


A B C D



The answer is B.

Which of the following elements would you expect to be the most electronegative?

1. Magnesium

2. Aluminium

3. Sodium

4. Calcium

Question 361 78627 1 1


A B C D



The answer is B.

Which of the following elements would you expect to have the least first ionisation energy?

1. Xenon

2. Francium


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3. Fluorine

4. Lithium

Question 371 78631 1 1


A B C D



The answer is B.

What functional group is shown below?

1. Amino

2. Carboxyl

3. Ether

4. Hydroxyl

Question 381 78635 1 1


A B C D



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The answer is D.

How would you record the measurement on the graduated cylinder below?

1. 10 mL

2. 13 mL

3. 15 mL

4. 16 mL

Question 391 78639 1 1


A B C D

Score: 0 / 1Submitted: 6/3/2010 7:35

PM



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The answer is B.

Which of the following would be expected to have the highest melting point?

1. CO2

2. NaCl

3. SO

4. NO2

Question 401 78642 1 1


A B C D



The answer is B.


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1 0 715

1. Bases feel slippery and change litmus red.

1. True

2. False

Question 11 78655 1 1


A. True B. False


1.


The answer is B.

Identify the two reagents necessary to produce the following compound.

1. CH3CH3 + 2HBr

2. CH2CH2 + HBr

3. CH3CH3 + Br2

4. CH2CH2 + Br2


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Question 21 78658 1 1


A B C D

Score: 0 / 1



The answer is D.

Carbon monoxide is considered toxic to all warm-blooded animals as 1. it causes irritation of the respiratory system.

2. it inhibits the transportation of oxygen by red blood cells.

3. it damages the conjunctiva of the eye.

4. it can cause gastroenteritis.

Question 31 78661 1 1


A B C D



The answer is B.

When sulphur dioxide is produced, it contributes to acid rain. Complete the reaction below.

SO2(g) + ______ ______ (sulphurous acid)

1. H2O, H2SO4

2. H2O, HSO4

3. H2, H2SO3

4. H2O, H2SO3


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Question 41 78664 1 1


A B C D

Score: 0 / 1



The answer is D.

Which of the following is not a property of glass?1. It has different properties in all directions.

2. When heated, it softens to a viscous fluid.

3. When struck, it shatters along a plane.

4. When it breaks, it does so in an irregular fashion.

Question 51 78667 1 1


A B C D



The answer is A.

Identify the element below that can not participate in ionic bonding.

1. Si

2. S

3. Na

4. Cl


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Question 61 78670 1 1


A B C D

Score: 0 / 1



The answer is A.

Carbon is an element found in group 4 and period 2 of the periodic table. Which one of the following isnot a property of C.

1. Melting point (K): 3843

2. Boiling point (K): 717

3. Common oxidation states: +4, +2

4. Physical state: solid at room temperature

Question 71 78673 1 1


A B C D



The answer is B.

Choose from the list below the base that is not considered a strong base.

1. NH4OH

2. LiOH

3. KOH

4. NaOH


27/44

Question 81 78676 1 1


A B C D

Score: 0 / 1



The answer is A.

Identify the condensed structural formula of 2,3-dimethyl butane.1. CH3CH2(CH3)CH2(CH3)CH3

2. CH3(CH3)CH2CH2(CH3)CH3

3. CH3CH2(C2H5)CH2(CH3)CH3

4. CH3CH2CH2CH2CH3

Question 91 78679 1 1


A B C D



The answer is A.

Which of these are saturated hydrocarbons that contain only carbon-carbon single bonds?

1. alkanes

2. alkenes

3. organic acids

4. esters


28/44

Question 101 78682 1 1


A B C D

Score: 0 / 1



The answer is A.

A process demonstrating the particulate nature of matter is

1. dispersion.

2. formation of colloids.

3. diffusion.

4. melting.

Question 111 78688 1 1


A B C D



The answer is C.

Phenolphthalein is an indicator that is 1. red in an acid and blue in a base.

2. light green in an acid and light blue in a base.

3. colourless in an acid and pink in a base.

4. red in an acid and yellow in a base.


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Question 121 78691 1 1


A B C D

Score: 0 / 1



The answer is C.

An example of the preparation of a soluble salt is

1. CaCO3 (s) + 2HCl(aq) CaCl2 (aq) + H2O(l) + CO2 (g)

2. Fe(s) + S(s) FeS(s)

3. Ba(NO3)2 (aq) + K2SO4 (aq) BaSO4 (s) + 2KNO3 (aq)

4. 2Fe(s) + 3Cl2 (g) 2FeCl3 (s)

Question 131 78694 1 1


A B C D



The answer is A.

The noble gases are chemically reactive because they have very few valence electrons.1. Both statements are true and the second statement is a correct explanation of the first.





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Question 141 78697 1 1


A B C D

Score: 0 / 1



The answer is D.

Permanent hardness is due to

1. leachates from gypsum rocks.

2. the carbonates of Ca and Mg.

3. the hydrogen carbonates of Ca and Mg.

4. the sulphates of Na and Al.

Question 151 78700 1 1


A B C D



The answer is A.

Water has a density of 1.00 g cm

3

at 4C and 0.998 g cm3

at 20C. Calculate the mass of 10cm3 of water at both temperatures.

1. 0.1 g and 0.0998 g, respectively

2. 1.0 g and 9.98 g, respectively

3. 10 g and 9.98 g, respectively

4. 10 g and 0.0998 g, respectively


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Question 161 78703 1 1


A B C D

Score: 0 / 1



The answer is C.

Balance the following equation:

____H3PO3 ____H3PO4 + ____PH3

1. 3H3PO3, 2H3PO4, PH3

2. 4H3PO3, 2H3PO4, 2PH3

3. 4H3PO3, 3H3PO4, PH3

4. 4H3PO3, 2H3PO4, PH3

Question 171 78706 1 1


A B C D



The answer is C.

How many molecules of ethanol are present in a 92.2 g sample?

1. 3.01 1023

2. 6.02 1023

3. 6.02 1022

4. 1.2 1024


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Question 181 78710 1 1


A B C D

Score: 0 / 1



The answer is D.

The empirical formula of acetic acid was found to be CH2O. Identify the factor that should beused to multiply the empirical formula to obtain the molecular formula.

1. 1

2. 3

3. 2

4. 4

Question 191 78714 1 1


A B C D



The answer is C.

Which of the following molecules is polar?

1. H2O

2. CO2

3. CH4

4. C2H4


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Question 201 78717 1 1


A B C D

Score: 0 / 1



The answer is A.

If an atom has 10 protons, 12 electrons, and 14 neutrons, what is the atomic mass of thisatom?

1. 22

2. 24

3. 36

4. 12

Question 211 78724 1 1


A B C D


The following model answer has been provided to you by the grader. Carefully compare your

answer with the one provided here.The answer is B.

If an ore is found to be 5% silver by mass, how many moles of silver could be extracted from2.0 kilograms of this ore?

1. 18.54 moles

2. 1.08 moles


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3. 0.93 moles

4. 16.93 moles

Question 221 78728 1 1


A B C D



The answer is C.

Which of the following elements would you expect to have the largest atomic radius?

1. Calcium

2. Sodium

3. Chlorine

4. Potassium

Question 231 78732 1 1


A B C D



answer with the one provided here.The answer is D.

An element X has two isotopes: X18 and X21. If the atomic mass of X is 20.6, what is therelative abundance of X18?

1. 13%

2. 87%


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3. 72%

4. 28%

Question 241 78736 1 1


A B C D



The answer is A.

What is given off in a beta particle emission reaction?

1. A helium nucleus

2. High energy photons

3. An electron

4. A proton

Question 251 78740 1 1


A B C D



answer with the one provided here.The answer is C.

Which of the following gases has the greatest volume at the same temperature and pressure?

1. 4 moles of hydrogen gas

2. 3 moles of helium gas

3. 6 moles of oxygen gas


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4. They all have the same volume

Question 261 78744 1 1


A B C D



The answer is C.

If a vial contains 4 moles of neon gas and 2 moles of fluorine gas and has a total pressure of12 kPa, what would be the pressure in the vial if all the fluorine gas were removed?

1. 4 kPa

2. 2 kPa

3. 10 kPa

4. 8 kPa

Question 271 78748 1 1


A B C D



The answer is D.

A gas collected over water at 75C has a pressure of 120 kPa. If the vapor pressure of waterat 75C is 24 kPa, what would be the pressure of the same collected gas when dried?

1. 144 kPa

2. 120 kPa

3. 108 kPa


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4. 96 kPa

Question 281 78752 1 1


A B C D



The answer is D.

Which point on the phase diagram below represents the triple point?

1. B

2. E


38/44


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2. Strontium

3. Calcium

4. Rubidium

Question 311 78769 1 1


A B C D



The answer is C.

If a solution has a hydrogen ion concentration [H+] = 4.7 109, then what is the pH of thissolution?

1. 5.67

2. 4.47

3. 9.53

4. 8.33

Question 321 78773 1 1


A B C D



The answer is D.

If a solution has a hydrogen ion concentration [H+] = 1.0 103, then what is the pOH of thissolution?

1. 3.00


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2. 4.00

3. 10.00

4. 11.00

Question 331 78777 1 1


A B C D



The answer is D.

If a solution has a pOH of 2.46 then what is the pH of this solution?

1. 2.46

2. 3.41

3. 11.54

4. 10.59

Question 341 78781 1 1


A B C D



The answer is C.

What is the oxidation number of carbon in SrCO3?

1. 3+

2. 4


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3. 3

4. 4+

Question 351 78785 1 1


A B C D



The answer is D.

If a gas releases 60 J of heat and is compressed by its surroundings with 10 J of work, thenwhat is the free energy change of this gas?

1. 70 J

2. +50 J

3. 50 J

4. +70 J

Question 361 78789 1 1


A B C D



The answer is C.

Which of the following elements would you expect to be the least electronegative?

1. Oxygen

2. Chlorine


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3. Fluorine

4. Phosphorus

Question 371 78793 1 1


A B C D



The answer is D.

Which of the following elements would you expect to have the greatest first ionisationenergy?

1. Oxygen

2. Neon

3. Argon

4. Sulphur

Question 381 78797 1 1


A B C D



The answer is B.

How would the following molecule be classified?


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1. Ether

2. Carboxylic Acid

3. Ketone

4. Alcohol

Question 391 78801 1 1


A B C D



The answer is A.

Which of the following types of glassware is the most accurate for preparing a solution of aspecific volume?

1. Beaker

2. Graduated Cylinder

3. Volumetric Flask

4. Erlenmeyer Flask

Question 401 78805 1 1




44/44

A B C D


The answer is C.

chemistry practice test 1 start 1 2 3 4

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