Chemistry Multiple Choice Questions Scrambled

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| By Thomasthegreat
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Thomasthegreat
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Quizzes Created: 2 | Total Attempts: 4,957
| Attempts: 375
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  • 1/160 Questions

    PH is an important factor in

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About This Quiz

Challenge your knowledge of chemistry with this scrambled multiple-choice quiz! Topics include atomic structure, the periodic table, and isotopes. Ideal for students looking to test their understanding of fundamental chemistry concepts and prepare for competitive exams.

Chemistry Multiple Choice Questions Scrambled - Quiz

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  • 2. 

    The person given credit for developing the first modern periodic table is

    • Dalton

    • Democritus

    • Thomson

    • Mendeleev

    • Chadwick

    Correct Answer
    A. Mendeleev
    Explanation
    Test 1

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  • 3. 

    There are 3.01 x 10^23 atoms present in

    • 0.5 mol of C

    • 0.5 mol of Na

    • 0.5 mol of Ar

    • None of the above

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    Test 3

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  • 4. 

    The total number of atoms represented in the formula Be(C2H3O2)2 is

    • 4

    • 8

    • 15

    • 22

    • 29

    Correct Answer
    A. 15
    Explanation
    Test 3

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  • 5. 

    Cola soft drinks have a sucrose concentration of 11g/100mL. What mass of sucrose is present in a 355mL can of Cola?

    • 11g

    • 39g

    • 30g

    • 22g

    • 0.11g

    Correct Answer
    A. 39g
    Explanation
    Test 4

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  • 6. 

    What volume of water should be added to 500mL of a 1.0mol/L CuSO4 solution to dilute it to 0.5mol/L

    • 500mL

    • 1.0L

    • 250mL

    • 125mL

    • 375mL

    Correct Answer
    A. 500mL
    Explanation
    Test 4

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  • 7. 

    Which of the following is NOT a property of acids?

    • They taste sour

    • They have a pH less than 7

    • They react with metals

    • They do not react with carbonates

    • They turn blue litmus red

    Correct Answer
    A. They do not react with carbonates
    Explanation
    Test 5

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  • 8. 

    A metaloid in Period 3 is

    • Scandium

    • Aluminum

    • Germanium

    • Phosphorus

    • Silicon

    Correct Answer
    A. Silicon
    Explanation
    Test 1

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  • 9. 

    The atomic mass of barium is due to the number of

    • Neutrons and electrons in the nucleus

    • Electrons in the nucleus

    • Protons and neutrons in the nucleus

    • Protons and electrons in the atom

    • Protons in the nucleus

    Correct Answer
    A. Protons and neutrons in the nucleus
    Explanation
    Test 1

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  • 10. 

    The substance NH3 is a very important industrial chemical. It is used directly as a fertilizer and is also used to produce many other useful chemicals. The IUPAC name of this substance is

    • Hydrogen nitride

    • Ammonia

    • Hydrogen peroxide

    • Octane

    • Ammonium

    Correct Answer
    A. Ammonia
    Explanation
    Test 2

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  • 11. 

    Which of the following always indicates that a chemical reaction has taken place?

    • Production of a gas

    • Absorption of heat

    • Change in colour

    • Appearance of a new substance

    • Production of heat

    Correct Answer
    A. Appearance of a new substance
    Explanation
    Test 2

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  • 12. 

    One atomic mass unit is defined as

    • Exactly 1/14 the mass of a C-12 atom

    • Exactly 14 times the mass of a C-12 atom

    • Exactly 1/12 the mass of a C-12 atom

    • Exactly 12 times the mass of a C-12 atom

    • None of the above

    Correct Answer
    A. Exactly 1/12 the mass of a C-12 atom
    Explanation
    Test 3

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  • 13. 

    Converting 153.0g of Mg(CN2) into moles yields approximately

    • 0.98 mol

    • 1.49 mol

    • 2.53 mol

    • 3.06 mol

    • 2.00 mol

    Correct Answer
    A. 2.00 mol
    Explanation
    Test 3

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  • 14. 

    A possible molecular formula for the compound CH2O is

    • C2H4O2

    • C3H6O3

    • C4H8O4

    • C10H20O10

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    Test 3

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  • 15. 

    The percentage of nitrogen, by mass, in nitric acid, HNO3, is

    • 1.6%

    • 11.1%

    • 15.6%

    • 22.2%

    • 72.6%

    Correct Answer
    A. 22.2%
    Explanation
    Test 3

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  • 16. 

    The percentage composition of chlroine, by mass, in the compound K2PtCl4 is

    • 47.0%

    • 34.2%

    • 18.9%

    • 15.3%

    • 11.3%

    Correct Answer
    A. 34.2%
    Explanation
    Test 3

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  • 17. 

    The empirical formula of a compound containing 92.3% carbon and 7.7% hydrogen, by mass, is

    • C20H20

    • C12H12

    • C6H6

    • CH4

    • CH

    Correct Answer
    A. CH
    Explanation
    Test 3

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  • 18. 

    If the molar mass of a hydrocarbon is 26.0g/mol, and its empirical formula is CH, its molecular formula is

    • CH

    • C2H2

    • C3H3

    • C4H4

    • C5H5

    Correct Answer
    A. C2H2
    Explanation
    Test 3

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  • 19. 

    One way to produce oxygen gas is via the decomposition of potassium chlorate, as shown in the equation KClO3 = KCl + O2. When properly balanced the sum of the coefficients is 

    • 3

    • 6

    • 7

    • 10

    • 11

    Correct Answer
    A. 7
    Explanation
    Test 3

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  • 20. 

    Determine the number of moles of silver that are produced when 210g of silver nitrate are completely reacted as shown in the following reaction: Sn + 2AgNO3 = 2Ag + Sn(NO3)2

    • 1.24mol

    • 1.78mol

    • 2.48mol

    • 3.11mol

    • 4.07mol

    Correct Answer
    A. 1.24mol
    Explanation
    Test 3

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  • 21. 

    An underground formation of permeable rock that produces useful well water is a

    • Puddle

    • Reservoir

    • River

    • Pond

    • Aquifer

    Correct Answer
    A. Aquifer
    Explanation
    Test 4

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  • 22. 

    Which of the following is a common source of water contamination?

    • Landfill leachate

    • Agricultural fertilizers and pesticides

    • Road salt runoff

    • Mining and mine tailings

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    Test 4

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  • 23. 

    The contamination of Walkerton, Ontario's water supply in 2000 was caused by

    • Lead

    • Mercury

    • Pesticides

    • E.coli bacteria

    • Nitrates

    Correct Answer
    A. E.coli bacteria
    Explanation
    Test 4

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  • 24. 

    A bottle contains 3L of 12mol/L H2SO4 solution. After half of the contents are usedup, the remaining solution has a concentration of

    • 18mol/L

    • 12mol/L

    • 6mol/L

    • 3mol/L

    • None of the above

    Correct Answer
    A. 12mol/L
    Explanation
    Test 4

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  • 25. 

    Which of the following is the correct net ionic equation for barium sulphate?

    • Ba(aq) + S(aq) = BaS(s)

    • B(aq) + SO3(aq) = BSO3(s)

    • Be(aq) + SO4(aq) = BeSO4(s)

    • Ba(aq) + SO4(aq) = BaSO4(s)

    • None of the above

    Correct Answer
    A. Ba(aq) + SO4(aq) = BaSO4(s)
    Explanation
    Test 4

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  • 26. 

    An acidic solution such as vinegar

    • Turns litmus paper blue

    • Turns litmus paper red

    • Has a salty taste

    • Feels slippery

    • Has a bitter taste

    Correct Answer
    A. Turns litmus paper red
    Explanation
    Test 5

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  • 27. 

    A mixture of 0.2 mol Ar and 0.25 mol N2 is compressed at 298K from 10.0L to 1.00L. What is the change in pressure?

    • 1114 kPa to 111.4 kPa

    • 111.4 kPa to 1114 kPa

    • 9.35 kPa to 93.5 kPa

    • 93.5 kPa to 9.35 kPa

    • None of the above

    Correct Answer
    A. 111.4 kPa to 1114 kPa
    Explanation
    Test 6

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  • 28. 

    Air Canada air buses fly at altitudes around 10km which is

    • Near the top of the stratosphere

    • Near the top of the troposphere

    • Above the ozone layer

    • In the mesosphere

    • In the ozone layer

    Correct Answer
    A. Near the top of the troposphere
    Explanation
    Test 6

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  • 29. 

    The ratio of hydrogen to oxygen, by mass, in water is

    • 2:1

    • 1:2

    • 1:16

    • 1:8

    • 16:1

    Correct Answer
    A. 1:8
    Explanation
    Test 3

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  • 30. 

    A compound containing carbon, hydrogen, and chlorine is composed of 49.0% carbon and 2.74% hydrogen by mass; the remainder is chlorine. The empirical formula of the compound is 

    • CHCl

    • C3H2Cl

    • C2H2Cl

    • C2H3Cl

    • C2H3Cl2

    Correct Answer
    A. C3H2Cl
    Explanation
    Test 3

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  • 31. 

    Household ammonia has a pH of 12.5 and lye has a pH of 13.5. Which of the following is true?

    • Ammonia is ten times more basic than lye

    • Lye is two times more basic than ammonia

    • There is no significant difference in the acidities of ammonia and lye

    • Lye is ten times more basic than ammonia

    • Ammonia is less acidic than lye

    Correct Answer
    A. Lye is ten times more basic than ammonia
    Explanation
    Test 5

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  • 32. 

    Doubling the initial pressure while keeping the temperature constant causes the volume of a gas to go from 1000mL to 

    • 2000mL (double)

    • 500mL (halved)

    • 1000mL (constant)

    • About 900mL (slight decrease)

    • 1100mL (slight increase)

    Correct Answer
    A. 500mL (halved)
    Explanation
    Test 6

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  • 33. 

    The particle that has the smallest mass is the

    • Electron

    • Proton

    • Nucleus

    • Ion

    • Neutron

    Correct Answer
    A. Electron
    Explanation
    Test 1

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  • 34. 

    Which of the following matches of group number and common name is incorrect?

    • Group 2 - Alkaline Earth Metals

    • Group 6 - Lanthanides

    • Group 1 - Alkali Metals

    • Group 17 - Halogens

    • Group 18 - Noble Gases

    Correct Answer
    A. Group 6 - Lanthanides
    Explanation
    Test 1

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  • 35. 

    Which of the following matches of group number and common name is incorrect?

    • Group 7 - Transition Metals

    • Group 2 - Alkali Earth Metals

    • Group 17 - Halogens

    • Group 2 - Actinides

    • Group 18 - Noble Gases

    Correct Answer
    A. Group 2 - Actinides
    Explanation
    Test 1

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  • 36. 

    Which of the following is the most reactive element?

    • Helium

    • Radon

    • Francium

    • Hydrogen

    • Ununoctium

    Correct Answer
    A. Francium
    Explanation
    Test 1

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  • 37. 

    Which of the following is a practical use of radioisotopes?

    • Determining the age of old objects

    • Medical diagnosis

    • Production of electricity

    • All of the above

    • None of the above

    Correct Answer
    A. All of the above
    Explanation
    Test 1

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  • 38. 

    According to the Lewis model of the atom, the number of bonding electrons in a nitrogen atom is

    • 1

    • 2

    • 3

    • 5

    • 7

    Correct Answer
    A. 3
    Explanation
    Test 1

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  • 39. 

    The systematic IUPAC name for HBr(aq) is

    • Aqueous bromine

    • Aqueous hydrogen bromide

    • Hypobromic acid

    • Hydrobromic acid

    • Bromic acid

    Correct Answer
    A. Aqueous hydrogen bromide
    Explanation
    Test 1

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  • 40. 

    An example of a binary compound is

    • NaOH

    • O2

    • H2S

    • CaCO3

    • Co

    Correct Answer
    A. H2S
    Explanation
    Test 1

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  • 41. 

    Hydroselenic acid is a very toxic substance. Its chemical formula is

    • HSe

    • H2SeO

    • H2Se

    • H2SeO3

    • H2SeO4

    Correct Answer
    A. H2Se
    Explanation
    Test 2

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  • 42. 

    What is the formula for zinc chloride?

    • ZnCl

    • ZnCl2

    • Zn1Cl1

    • Zn1Cl2

    • Zn2Cl1

    Correct Answer
    A. ZnCl2
    Explanation
    Test 2

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  • 43. 

    An example of a binary compound is

    • NaOH

    • O2

    • H2S

    • CaCO3

    • Co

    Correct Answer
    A. H2S
    Explanation
    Test 2

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  • 44. 

    Classify the following reaction: Cl2 + ZnI2 = ZnCl2 + I2

    • Combustion

    • Synthesis

    • Decomposition

    • Single displacement

    • Double displacement

    Correct Answer
    A. Single displacement
    Explanation
    Test 2

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  • 45. 

    Stainless steel is harder than pure iron because

    • It is an alloy

    • It is metallic

    • The electrons in it are free to move

    • All of the above

    • None of the above

    Correct Answer
    A. It is an alloy
    Explanation
    Test 2

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  • 46. 

    The greenhouse effect is caused by

    • Infrared radiation

    • Ultraviolet radiation

    • Water

    • Carbon dioxide

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    Test 2

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  • 47. 

    The mass found in 0.10 mol of KHC4H4O6 is 

    • 4.6g

    • 19g

    • 23.7g

    • 37.6g

    • 55.8g

    Correct Answer
    A. 19g
    Explanation
    Test 3

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  • 48. 

    What mass of pure hydrogen peroxide would be dissolved in 250mL of 6.0% W/V H2O2(aq)

    • 12g

    • 25g

    • 6g

    • 15g

    • 2.5g

    Correct Answer
    A. 15g
    Explanation
    Test 4

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  • 49. 

    Which of the following contains 1mol of dissolved copper(II) nitrate?

    • 500mL of a 0.5mol/L solution

    • 750mL of a 0.75mol/L solution

    • 500mL of a 2.0mol/L solution

    • 1L of a 0.9mol/L solution

    • 2L of a 0.4mol/L solutions

    Correct Answer
    A. 500mL of a 2.0mol/L solution
    Explanation
    Test 4

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  • Current Version
  • Mar 20, 2023
    Quiz Edited by
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  • Jun 22, 2016
    Quiz Created by
    Thomasthegreat

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