Question 1

The spin quantum number of an electron can be thought of as describing _______

Accepted Answer

the direction of electron spin.

Answer

whether the electron's charge is positive or negative.

Answer

the electron's exact location in orbit.

Answer

the number of revolutions the electron makes about the nucleus per second

Question 2

How many electrons from the outermost shell does a 4s orbital possess?

Accepted Answer

2

Answer

3

Answer

4

Answer

5

Question 3

Which set of quantum numbers uniquely defines one of the electrons in an atomic orbital with n = 2 and l = 0?

Accepted Answer

n = 2, l = 0, m_l = 0, m_s = +½

Answer

n = 2, l = 0, m_l= 1, m_s= +½

Answer

n = 2, l = 0, m_l= 1, m_s = +1

Answer

n = 2, l = 0, m_l= 0, ms = +1

Question 4

What is the electron configuration for nitrogen, atomic number 7?

Accepted Answer

1s²2s² 2p³

Answer

1s²2s³ 2p²

Answer

1s² 2s² 2p² 3s¹

Answer

1s²2s² 2p¹

Question 5

Which of these d-orbitals contains both paired and unpaired electrons?

Accepted Answer

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Answer

https://uploads.quizalize.com/f5d42cfa-26b8-4415-a48a-21322e236b3a/question/3434236ef6f0fd6e94b83f6489ba01c2c3b897ff.png

Answer

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Answer

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Question 6

How many valence electrons does Boron have?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 7

Covalent and ionic bonding produce certain types of compounds that have different properties. What is the general term used for all the compounds with covalent bond?

Accepted Answer

molecule

Answer

none of the choices

Answer

atom

Answer

compound

Question 8

Non-polar covalent bonding involves the equal sharing of electrons between atoms to attain stability. Which of the following compounds will have non-polar covalent bonding?

Accepted Answer

O2

Answer

HCl

Answer

CH4

Answer

NaCl

Question 9

Electrical and thermal conductivity is one of the properties of compounds. Which of the following types of bonds will have a high electrical conductivity?

Accepted Answer

ionic bond

Answer

non-polar covalent bond

Answer

covalent bond

Answer

polar covalent bond

Question 10

The following compounds are commonly found in nature or in our household. Which do you think will have the highest melting/boiling point if we are to subject those substances to heating?

Accepted Answer

sodium chloride(NaCl)

Answer

sucrose (sugar)

Answer

dihydrogen monoxide (water)

Question 11

What happens to the electron of a metal element in ionic bonding forming a compound?

Accepted Answer

transferred to non-metal

Answer

none of the choices

Answer

shared unequally with non-metal

Answer

shared to a non-metal

Question 12

Which best describes the position of the elements in the Periodic Table and its valence electrons?

Accepted Answer

Elements on the same family have the same valence electrons

Answer

Noble Gases elements haveseven valence electrons

Answer

All metalloids have the samevalence electrons

Answer

Elements on the same period have the same valence electrons

Question 13

Which best describes an anion?

Accepted Answer

It has more electrons than protons.

Answer

It has a neutral charge.

Answer

It has more protons than electrons.

Answer

It has more neutrons than protons.

Question 14

How many electrons does Fluorine ion need for it to be stable?

Accepted Answer

1

Answer

3

Answer

4

Answer

2

Question 15

What ion can be combined with oxygen ions to form an ionic compound?

Accepted Answer

Calcium ion

Answer

Carbon ion

Answer

Chlorine ion

Answer

Fluorine ion

Question 16

Which of the following LED symbols best describe the anion present in the given statement?

Accepted Answer

https://uploads.quizalize.com/f5d42cfa-26b8-4415-a48a-21322e236b3a/question/46167d6560e8869c8814ed5c1786008e5b556cfb.png

Answer

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Answer

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Answer

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Question 17

Which of the following ions is classified as polyatomic cation?

Accepted Answer

NH4+

Answer

Cr₂O₇^2–

Answer

CN–

Answer

Co2+

Question 18

As you pour the motor oil in the machine, you notice that the flow is somewhat thick and sticky as compared to water. What property best describes this scenario?

Accepted Answer

Motor oil has high viscosity.

Answer

Motor oil has low volatility.

Answer

Motor oil has high volatility.

Answer

Motor oil has low viscosity.

Question 19

Which of the following compounds is classified as organic compounds?

Accepted Answer

Sodium atoms

Answer

Oxygen atom

Answer

Carbon atom

Answer

Hydrogen atom

Question 20

Which of the following compounds is classified as organic compounds?

Accepted Answer

C3H8

Answer

CBr4

Answer

CaCO3

Answer

CO2

Question 21

Which of the following sets of Organic Compounds is viscous?

I. Ethyl Alcohol III. Honey

II. Liquified Petroleum Gas IV. Motor Oil

Accepted Answer

Honey

Answer

Liquified Petroleum Gas

Answer

Motor Oil

Answer

Ethyl Alcohol

Question 22

All of these are found in every household. Which of the following household products does not belong to the group?

Accepted Answer

table sugar – C₆H₁₂O₆

Answer

table salt – NaCl

Answer

bleach– NaClO

Answer

Milk of Magnesia –Mg(OH)₂

Question 23

Below are formulas of organic compounds, which of the following is/are condensed structural formula?

Accepted Answer

II only

Answer

I and III

Answer

I only

Answer

II and IV

Question 24

Refer to the structure on the right. Which group of hydrocarbons does the molecule belong to?

Accepted Answer

alkene

Answer

alkane

Answer

alkyne

Answer

benzene

Question 25

What is the correct molecular formula of a hydrocarbon having 7 atoms that contains a single bond?

Accepted Answer

C₇H₁₆

Answer

C₇H₁₂

Answer

C7H7

Answer

C₇H₁₄

Question 26

Methane is also known as biogas. What is the use of this compound?

Accepted Answer

fuel

Answer

disinfectant

Answer

medicine

Answer

antibiotic

Question 27

Two alkane compounds, butane and octane were placed in separate unlabeled containers. Several tests were conducted to describe properties of the compounds. What properties can you observe on the two compounds?

I. Butane is a gas while octane is a liquid.

II. Butane has a lower boiling point compared to octane.

III. Butane is insoluble in water while octane is soluble.

IV. Butane is flammable while octane is not flammable.

Accepted Answer

I and II

Answer

II only

Answer

I only

Answer

III and IV

Question 28

Ethyl alcohol is a colorless liquid which is an ingredient of liquors. Which of the following is the correct molecular formula of ethyl alcohol?

Accepted Answer

C2H5OH

Answer

CH3OH

Answer

C3H7OH

Answer

C4H9OH

Question 29

What is the difference between a molecular unit from a formula unit?

Accepted Answer

The molecular unit represents a covalent compound while the formula unit is for ionic compounds.

Answer

Both are the same

Answer

The molecular unit represents an ionic compound while the formula unit is for covalent compounds.

Answer

None of the above

Question 30

The following are examples of covalent compounds, which molecule is equivalent to 1 mole?

Accepted Answer

I and II

Answer

I only

Answer

II only

Answer

III and IV

Question 31

In an experiment, a beaker contains 1.204 x 10²⁴ formula units of sodium chloride (NaCl). How many moles are in this substance?

Accepted Answer

2 moles

Answer

4 moles

Answer

10 moles

Answer

8 moles

Question 32

Sodium hydroxide (NaOH) or lye is a compound used for making soap. Sodium chloride(NaCl) is table salt. If you are going to compare 40 g NaOH with 40 g of NaCl, table salt contains

Accepted Answer

less number of formula units

Answer

an equal number of moles

Answer

more number of moles

Answer

more number of formula units

Question 33

Glucose(C₆H₁₂O₆) is a substance that is found in the blood. This compound is a component of the intravenous solution. If a COVID-19patient needs 1.5 moles of glucose, how many grams of this compound should be placed in the intravenous solution?

Accepted Answer

270g C₆H₁₂O₆

Answer

540g C₆H₁₂O₆

Answer

360g C₆H₁₂O₆

Answer

180g C₆H₁₂O₆

Question 34

The world is experiencing a pandemic situation because of COVID-19. It is advised that one should boost his or her immune system. Taking ascorbic acid (C₆H₈O₆)or commonly known as vitamin C daily will help you boost your immune system. This vitamin is usually given in a 500 mg (0.5 g) tablet. If you take one tablet per day for 15 days, how many molecules of ascorbic acid will you have?

Accepted Answer

2.56x 10²² molecules C₆H₈O₆

Answer

2.56x 10²³ molecules C₆H₈O₆

Answer

2.56x 10²¹ molecules C₆H₈O₆

Answer

2.56x 10²⁴ molecules C₆H₈O₆

Question 35

Which of the following is the ratio of the atomic mass of an element in a compound and the total mass of all elements in the compound multiplied by one hundred?

Accepted Answer

percentage composition

Answer

percent by mole

Answer

percent by whole

Answer

percent yield

Question 36

Ferrous sulfate or iron (II) sulfate is a supplement prescribed to persons who has iron-deficiency anemia. It has a chemical formula of FeSO₄.Determine the percentage of iron in this compound with a molar mass of 152g/mol.

Accepted Answer

37%

Answer

21%

Answer

56%

Answer

42%

Question 37

What is the percentage composition of water(H2O) with a molar mass of 18 g/mol?

Accepted Answer

H=11%;O=89%

Answer

H=13%;O=87%

Answer

H=15%;O=85%

Answer

H=16%;O=84%

Question 38

In which way can you apply the knowledge on percentage composition?

Accepted Answer

in knowing the amount of sodium in instant noodles

Answer

in identifying the element present

Answer

in checking if the substance is pure

Answer

in knowing the value of the substance

Question 39

Calcium carbonate (CaCO₃) is a substance naturally found in rock and mineral formations. It is widely used for making cement and tiles. What is the percentage of calcium in this compound?

Accepted Answer

40%

Answer

12%

Answer

42%

Answer

20%

Question 40

Given below are formulas of covalent compounds, which of the following is an empirical formula?

Accepted Answer

P2O5

Answer

C₆H₁₂

Answer

P4O6

Answer

C₄H₁₀

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