Chimie Générale Preparation (Dr. Chhour Monivan, PhD)

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1154

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1) Which chemical element belong to halogen group?

a. oxygen

b. carbon

c. potassium

d. iodine

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2) Empirical formula of hydrogen peroxide?

a. H2O2

b. HO2

c. HO

d. H2O

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3) In the Periodic Table, elements are assigned with atomic number based on?

a. Number of neutrons

b. Number of protons

c. Number of electrons

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4) Which chemical element belong to alkali metal group?

a. magnesium

b. potassium

c. fluorine

d. calcium

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5) What are isotopes?

a. Elements that have the same number of neutrons

b. Elements that have the same number of electrons

c. Elements that have the same number of protons

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6) Which chemical element belong to halogen group?

a. oxygen

b. bromine

c. nitrogen

d. carbon

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7) Which subatomic particle has positive charge?

a. proton

b. electron

c. anion

d. neutron

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8) Which chemical element belong to halogen group?

a. gold

b. fluorine

c. cobalt

d. iron

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9) Molecular formula of sulfuric acid?

a. H3PO4

b. HCl

c. H₂ SO₄

d. HNO3

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10) Molecular formula of nitric acid?

a. H3PO4

b. H₂ SO₄

c. HNO3

d. HCl

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11) Which subatomic particle has negative charge?

a. proton

b. neutron

c. electron

d. cation

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12) Molecular formula of phosphoric acid?

a. HCl

b. H3PO4

c. HNO3

d. H₂ SO₄

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13) Which subatomic particle has no charge?

a. neutron

b. electron

c. proton

d. anion

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14) Which chemical element belong to alkali metal group?

a. cobalt

b. gold

c. carbon

d. sodium

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15) Which chemical element belong to alkali earth metal group?

a. nitrogen

b. magnesium

c. carbon

d. sodium

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16) Which chemical element belong to alkali earth metal group?

a. potassium

b. oxygen

c. calcium

d. carbon

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17) Which chemical element belong to halogen group?

a. chlorine

b. calcium

c. magnesium

d. lithium

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18) Glucose (C6H12O6), ribose (C5H10O5), Acetic acid (C2H4O2), and formaldehyde (CH2O) all have different molecular formulas but the same empirical formula. Write their empirical formula.?

a. C2H4O2

b. C5H10O5

c. CH2O

d. C6H12O6

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19) Which chemical element belong to alkali metal group?

a. lithium

b. Chlorine

c. iron

d. magnesium

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20) Empirical formula of hydrazine?

a. NH2

b. NH3

c. N2H4

d. N2H2

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