CHEMISTRY MULTIPLE CHOICE TEST

Chemistry Multiple Choice Test

1.	The nucleus of an atom consists of
	A. electrons and neutrons B. electrons and protons C. protons and neutrons D. All of the above

2.	The number of moles of solute present in 1 kg of a solvent is called its
	A. molality B. molarity C. normality D. formality

3.	The most electronegative element among the following is
	A. sodium B. bromine C. fluorine D. oxygen

4.	The metal used to recover copper from a solution of copper sulphate is
	A. Na B. Ag C. Hg D. Fe

5.	The number of d-electrons in Fe2+ (Z = 26) is not equal to that of
	A. p-electrons in Ne(Z = 10) B. s-electrons in Mg(Z = 12) C. d-electrons in Fe(Z = 26) D. p-electrons in CI(Z = 17)

6.	The metallurgical process in which a metal is obtained in a fused state is called
	A. smelting B. roasting C. calcinations D. froth floatation

7. The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called

A. granite B. basalt C. igneous rocks D. sedimentary rocks

9.	The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is
	A. Dalton's law B. Gay Lussac's law C. Henry's law D. Raoult's law

10.	The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is
	A. helium B. ozone C. oxygen D. methane

11.	The most commonly used bleaching agent is
	A. alcohol B. carbon dioxide C. chlorine D. sodium chlorine

	12.  The heat required to raise the temperature of body by 1 K is called
	A. specific heat B. thermal capacity C. water equivalent D. None of the above

13. The chemical symbol for manganese is

(a) Mn

(b) Mo

(c) Ma

(d) Ga

14. The number 0.005436 has how many significant figures?

(a) 7

(b) 3

(c) 4

(d) 5

15. What is the volume of a 2.50 gram block of metal whose density is 6.72 grams per cubic centimeter?

(a) 16.8 cubic centimeters

(b) 2.69 cubic centimeters

(c) 0.0595 cubic centimeters

(d) 0.372 cubic centimeters

16.  Nitric acid is a very important industrial chemical: 1.612 x 10¹⁰ pounds of it were produced in 1992. If the density of nitric acid is 12.53 pounds/gallon, what volume would be occupied by this quantity? (1 gallon = 3.7854 liters)

(a) 7.646 x 10¹¹ liters

(b) 8.388 x 10⁹ liters 

(c) 5.336 x 10¹⁰ liters

(d) 4.870 x 10⁹ liters

17. Identify the INCORRECT statement.

(a) Helium in a balloon: an element

(b) Paint: a mixture

(c) Tap water: a compound

(d) Mercury in a barometer; an element

18.  An unused flashbulb contains magnesium and oxygen. After use, the contents are changed to magnesium oxide but the total mass does not change. This observation can best be explained by the

(a) Law of Constant Composition.

(b) Law of Multiple Proportions.

(c) Avogadro's Law.

(d) Law of Conservation of Mass.

19.  Which answer includes all the following that are chemical changes and not physical changes?

I. freezing of water

II. rusting of iron

III. dropping a piece of iron into hydrochloric acid (H₂ is produced)

IV. burning a piece of wood

V. emission of light by a kerosene oil lamp

(a) III and IV

(b) II and V

(c) II, III, and V

(d) II, III, IV, and V

20.  Which response lists all of the following properties of sulfur that are physical properties and not other properties?

I. It reacts with hydrogen when heated.

II. It is a yellow solid at room temperature.

III. It is soluble in carbon disulfide.

IV. Its density is 2.97 g/cubic centimeter

V. It melts at 112�C.

(a) II, III, IV, and V

(b) II, IV, and V

(c) I

(d) II, III, and IV

21. The formula weight of the compound, Al₂(SO₄)₃18H₂O is:

(a) 394.4 g

(b) 666.4 g

(c) 110,900 g

(d) 466.8 g

22.  The limiting reagent in a chemical reaction is one that:

(a) has the largest molar mass (formula weight).

(b) has the smallest molar mass (formula weight).

(c) has the smallest coefficient.

(d) is consumed completely.

23. Which of the following is classified as a metal?

(a) Ge

(b) As

(c) F

(d) V 

24. Determine the oxidation number of carbon in K₂CO₃.

(a) 0

(b) +2

(c) +4

(d) -2

25.  Which name/formula combination is WRONG?

(a) phosphorous acid / H₃PO₄

(b) nitrogen oxide / NO

(c) acetate ion / CH₃COO^-

(d) sodium chromate / Na₂CrO₄

26.  Which name/formula combination is WRONG?

(a) chlorous acid / HClO₂

(b) dinitrogen tetroxide / N₂O₄

(c) ammonium nitrate / NH₄NO₃

(d) copper(II) periodate / CuIO₄

27.  Which of the following has a positive charge?

(a) proton

(b) neutron

(c) anion

(d) electron

28.  The neutral atoms of all of the isotopes of the same element have

(a) different numbers of protons.

(b) equal numbers of neutrons.

(c) the same number of electrons.

(d) the same mass numbers.

29. What is the atomic weight of a hypothetical element consisting of two isotopes, one with mass = 64.23 amu (26.0%), and one with mass = 65.32 amu?

(a) 65.3 amu

(b) 64.4 amu

(c) 64.9 amu

(d) 65.0 amu

30. The Heisenberg Principle states that _____________.

(a) no two electrons in the same atom can have the same set of four quantum numbers.

(b) two atoms of the same element must have the same number of protons.

(c) it is impossible to determine accurately both the position and momentum of an electron simultaneously.

(d) electrons of atoms in their ground states enter energetically equivalent sets of orbitals singly before they pair up in any orbital of the set.

31. The atom having the valence-shell configuration 4s² 4p⁵ would be in:

(a) Group VIA and Period 5

(b) Group IVB and Period 4

(c) Group VIB and Period 7

(d) Group VIIA and Period 4

32.  Select the term best describing the series of elements: Mn, Fe, Co, Ni, Cu.

(a) d-transition metals

(b) representative elements

(c) metalloids

(d) alkaline earth metals

33.  Which of the following terms accurately describes the energy associated with the process:

Li(g) Li⁺(g) + e^-

(a) electron affinity

(b) binding energy

(c) ionization energy

(d) electronegativity

34.  All of the following properties of the alkaline earth metals increase going down the group except

(a) atomic radius

(b) first ionization energy

(c) ionic radius

(d) atomic mass

35.  The valence electrons of representative elements are

(a) in s orbitals only.

(b) located in the outermost occupied major energy level.

(c) located closest to the nucleus.

(d) located in the innermost occupied shell.

36.  Which one of the formulas for ionic compounds below is incorrect?

(a) SrCl₂

(b) Cs₂S

(c) AlCl₃

(d) Al₃P₂

37. Three 1.0 liter flasks are filled with H₂, O₂ and Ne, respectively, at STP.
Which of the following statements is true?

(a) Each flask has the same number of gas molecules.

(b) The velocity of the gas molecules is the same in each flask.

(c) The density of each gas is the same.

(d) There are twice as many O₂ and H₂ molecules as Ne atoms.

38.  For a gas, which pair of variables are inversely proportional to each other (if all other conditions remain constant)?

(a) P, T

(b) P, V

(c) V, T

(d) n, V

39. What type of intermolecular forces are due to the attraction between temporary dipoles and their induced temporary dipoles?

(a) metallic bond

(b) London dispersion

(c) hydrogen bond

(d) ionic bond

40.  Which synthetic fibre is known as artificial silk?

A. Nylon

B. Rayon

C. Cotton

D. Terylene

41.  The chemical used as a fixer in photography  is

A. sodium sulphate

B. borax

C. sodium thiosulphate

D. ammonium sulphate

42.  What is a mixture of potassium nitrate powdered charcoal and sulphur called?

A. paint

B. glass

C. gun powder

D. cement

43.  Which one of the following gases is readily soluble in water at room temperature?

A. chlorine B. nitrogen C. ammonia D. carbon dioxide

44.  pH of blood is

A. 4

B. 6.4

C. 7.4

D. 8

45.  Bauxite is an ore of

A. copper

B. zinc

C. aluminium

D. iron

46. Aluminum oxide is a/an

A. basic oxide

B. acidic oxide

C. neutral acid

D. amphoteric acid

47. Ruby is an oxide of

A. silver

B. gold

C. platinum

D. aluminium

48. Natural rubber is a polymer derived from

A. isoprene

B. ethylene

C. propylene

D. butadiene

49.  Which substance is obtained by the hydrolysis of oil?

A. ethanol

B. glycol

C. acetic acid

D. glycerol

50. Washing soda is

A. sodium sulphite

B. sodium bicarbonate

C. sodiun carbonate

D. sodium biosulphite