PACOP BLUE M1

The water ion theory of acids and bases is attributed to:

---

A. Lewis

B. Bronsted

C. Arrhenius

D. Pauling

E. Pearson

C

This is radioactive particle that weights almost the same as helium atom.

---

A. x-ray

B. alpha ray

C. gamma ray

D. beta ray

E. ultraviolet ray

B

This is a sulfur containing ion that does not react with sulfuric acid?

---

A. Sulfide

B. Sulfite

C. Sulphate

D. thiosulfate

E. all of the given

C

A mole of a substance:

---

A. Contains Avogadro’s number particles

B. Weighs the same as its atomic weight or

molecular weight expressed in grams

C. Contains the same number of particles as 12

grams of Carbo

D. A and B

E. All of the above

A

Which of the following properties of matter is dependent on the quantity of matter

present?

---

A. Flammability

B. Volume

C. Boiling point

D. reactivity

E. density

B

An attraction of molecule by a magnetic field doe to completely paired electrons.

---

A. Diamagnetism

B. paramagnetism

C. dia-para magnestism

D. ferromagnetism

E. none of the given

A

Which of the following substances is pure?

---

A. 5% dextrose

B. Table sugar

C. Blood

D. rubbing alcohol

E. salt solution

B

An atom with an atomic number of 15 and a mass number of 29 has _____neutrons

---

A. 14

B. 15

C. 29

D. 39

E. 54

A

Two electrons occupying the same orbital differ in their:

---

A. Principal quantum number

B. Azimuthal quantum number

C. Magnetic quantum number

D. spin quantum number

E. angular momentum quantum

D

What particles account for most of the mass of an atom?

---

A. Proton

B. Electron

C. Neutron

D. a and b

E. a and c

E

Which of the following properties of elements decreases from left to right of the

periodic table.

---

A. Atomic size

B. Electron affinity

C. Electronegativity

D. non-metallic property

E. ionization potential

A

Which of the following processes is a physical change?

---

A. Distillation of water

B. Digestion of food

C. Neutralization of an acid by a base

D. fermentation of coconut water

E. combustion of methane

A

Which of the following statements shows an extensive property?

---

A. Iron nails conduct heat

B. Sampaguita flowers smells sweet

C. Water boils at 100 0C

D. A pinch of sugars weighs 2.3 grams

E. Glycerin is viscous

D

This refers to the direct transition of the solid state to the vapor state.

---

A. Deposition

B. sublimation

C. evaporation

D. condensation

E. melting

B

the reaction of a metal chloride dioxide produces:

---

A. metal chlorite

B. metal carbide

C. metal oxide

D. metal chlorate

E. metal perchlorate

D

The amount of heat requited to raise the temperature of one gram of a substance by one degree Celsius

---

A. Specific heat

B. Standard enthalpy

C. Heat capacity

D. heat of formation

E. calorie

A

In a family, the topmost element has the smallest:

---

A. Electronegativity

B. Ionization potential

C. Electron affinity

D. atomic size

E. a and b

D

In reaction , nitrogen changes from the molecular state, N2 to NO2, what happened to nitrogen was:

---

A. Oxidation

B. Reduction

C. Neutralization

D. A and C

E. B and C

A

How many moles of sodium are in a mole of sodium thiosulfate?

---

A. 1

B. 2

C. 3

D. 4

E. 5

B

What is the maximum number of electrons that can be accommodated in the p subshell?

---

A. 2

B. 5

C. 6

D. 10

E. 14

C

When a metal binds with a non-metal , the metal will most likely:

---

A. Donate electron/s

B. Accept electron/s unfilled orbitals

C. Share its electrons

D. allows its electron to move in an

A

This states that orbitals of the same energy will be singly filled first with electrons

before they are paired.

---

A. Aufbau principle

B. Hund’s rule

C. Pauli’s Exclusion Principle

D. Heisenberg Uncertainly Principle

E. n + I rule

B

The formula that gives the actual number of atoms is

---

A. Structural

B. Molecular formula

C. Empirical formula

D. chemical formula

E. none of the given

B

The reaction NiCl2 + Zn -------- Ni + ZnCl2 is a _______type of reaction

---

A. Combination

B. Combustion

C. Decomposition

D. single replacement

E. metathesis

D

Which of the following is a characteristic of the gaseous state?

---

A. The molecules move past one another

B. Is has definite shape

C. The molecules are tightly bonded

D. its volume is definite

E. All of the given

A

Graphite is an allotrope of the element______.

A. Na

B. Pb

C. Ca

D. C

E. O

D

This is also known as the salt-forming group of elements

---

A. Chalcogens

B. Alkali metals

C. Alkaline earth metals

D. halogens

E. colnage metals

D

A substance which can act as either an acid or a base.

---

A. Polymorph

B. Deliquescent

C. Amorphous

D. amphoteric

E. none of the given

D

Most abundant and essential of all elements

A. aluminum

B. oxygen

C. silicon

D. carbon

E. Hydrogen

B

The ion that gives the Prussian blue precipitate with potassium ferrocyanide.

---

A. Ferric

B. Ferrous

C. Zinc

D. nickel

E. cobalt

A

Evolves gas with fruity odor when treated with ethanol and concentrated hydrochloric acid

---

A. Acetate
B. Chlorate
C. Sulfate
D. Silicate
E. Chromate

A

Rochelle salt, which is used as a cathartic and a sequestering agent, is:

---

A. KHC₄H₄O₆
B. KNaC₄H₄O₆
C. KSbC₄H₄O₆
D. Na₂C₄H₄O₆
E. K₂C₄H₄O₆

B

The most electronegative element in the periodic table is:

A. S (Sulfur)
B. Cl (Chlorine)
C. F (Fluorine)
D. O (Oxygen)
E. N (Nitrogen

C

Which of the following scientists is/are the author/s of the periodic law?

A. Dalton
B. Proust
C. Charles and Boyle
D. De Broglie
E. Meyer and Mendeleev

E

The state of matter which occurs only at temperatures near absolute zero:

A. Plasma
B. Solid
C. Bose condensates
D. Liquid
E. Gas

C

These are atoms of the same element having the same number of protons but a different number of neutrons:

A. Isobars
B. Isotones
C. Isomers
D. Isotopes
E. None of the given

D

Produced by filling an orbital by an electron which is not removed from its atom but is held mutually or shared by the 2 atoms concerned:

A. Ionic bond
B. Van der Waal’s
C. Hydrogen bond
D. Metallic bond
E. Covalent bond

E

Salts are formed as a result of the reaction between:

A. Acid and base
B. Water and metal
C. Metal oxide and water
D. Non-metal oxide and water
E. D and C

A

Atoms that are tightly bound together and behave as a single entity:

A. Molecule
B. Ion
C. Element
D. Mixture
E. None of the given

A

This grouping of elements in the periodic table is based on the number of main energy levels filled by the electrons:

A. Family
B. Group
C. Period
D. A and B
E. B and C

C

When an atom accepts an electron it forms a/an:

A. Cation
B. Anion
C. Neutrally charged entity
D. A and B
E. None of the given

B

Substances that completely ionize in water are:

A. Non-electrolytes
B. Weak electrolytes
C. Strong electrolytes
D. Molecular
E. Covalent

C

This class of matter exhibits electrical property and optical property known as the Tyndall effect:

A. Solution
B. Suspension
C. Emulsion
D. Colloid
E. Compound

D

The product produced from the reaction of a non-metal oxide and water is:

A. Base
B. Salt
C. Oxy acid
D. Binary acid
E. None of the given

C

Metals can be coiled into wires because they are:

A. Malleable
B. Ductile
C. Lustrous
D. Brittle
E. Good conductors

B

The empirical formula of diphosphorous pentoxide is:

A. P₂O₅
B. PO₂
C. PO₃
D. PO
E. P₂O

A

Which of the following pairs of atoms will most likely form an ionic bond?

A. C and O
B. C and Ca
C. C and Cl
D. C and H
E. C and S

B

The percentage of C in sugar ( C12H22O11) if the atomic weight of C=12, H=1 and O=16 is

---

A. 3.5%

B. 8.3%

C. 42.1%

D. 57.9%

E. 85%

C

This refers to the ability of an atom to attract electrons of another atom to its side.

A. Ionization potential
B. Electronegativity
C. Electron affinity
D. Diamagnetism
E. Paramagnetism

B

Elements in the periodic table are arranged in order of increasing:

A. Atomic number
B. Mass number
C. Atomic weight
D. Atomic size
E. All of the above

A

These are electron pair donors:

A. Bronsted-Lowry acids
B. Arrhenius bases
C. Lewis acids
D. Lewis bases
E. Arrhenius acids

D

The law stating that elements combine in a fixed ratio by mass to form compounds is:

A. Law of Definite Proportion
B. Law of Multiple Proportion
C. Law of Thermodynamics
D. Boyle’s Law
E. Charle’s Law

A

Number of valence electrons of the element with atomic number 12?

A. 8
B. 6
C. 4
D. 2
E. 1

D

The sum of atomic masses of all the atoms in a molecule or formula unit is called:

A. Atomic mass
B. Molar mass
C. Molecular mass
D. Empirical mass
E. None of the given

C

The chemical reaction between an acid and a base that produces salt and water is called:

A. Oxidation
B. Reduction
C. Neutralization
D. Combination
E. Single replacement

C

A 10-volume hydrogen peroxide solution has a concentration of:

A. 3% w/v
B. 6% w/v
C. 10% w/v
D. 30% w/v
E. 50% w/v

A

Acts as a blood coagulant in vivo and anticoagulant in vitro:

A. Tartrate ion
B. Citrate ion
C. Phosphate ion
D. Thiosulfate ion
E. Sulfate ion

C

Synonym for Ammonium Carbonate, NF:

A. Spirit of Hartshorn
B. Sal Ammoniac
C. Preston Salt
D. Spirit of Mindererus
E. None of the given

C

An official gas that is used pharmaceutically to mask the disagreeable taste of certain medicines:

A. Carbon Dioxide, USP
B. Nitrogen, USP
C. Helium, USP
D. Oxygen, USP

A

These are substances that take/absorb sufficient water from the atmosphere forming a liquid:

A. Efflorescent
B. Deliquescent
C. A and B

B

What is the chemical name of HClO₃?

A. Hydrochloric Acid
B. Hypochlorous Acid
C. Chlorous Acid
D. Chloric Acid

D

Ions found in the extracellular fluid EXCEPT:

A. Phosphate
B. Chloride
C. Sodium
D. Bicarbonate

A

Itai-itai Disease is caused by poisoning with:

A. Mercury
B. Cadmium
C. Lead
D. Iron
E. Bismuth

B

Reagent that can differentiate carbonate from bicarbonate ion:

A. 3 N Hydrochloric acid
B. Phenolphthalein TS
C. Hydrogen Sulfide
D. Methyl Red TS

B

The following are regarded as soft acids according to HSAB concept EXCEPT:

A. Ag⁺
B. Hg²⁺
C. Al³⁺
D. None of the above

C