Chimie Générale Preparation (Dr. Chhour Monivan, PhD) – testnisset.com

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Chimie Générale Preparation (Dr. Chhour Monivan, PhD)

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

a. oxygen

b. carbon

c. potassium

d. calcium

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2) Which chemical element belong to halogen group?

a. nitrogen

b. oxygen

c. bromine

d. carbon

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3) What are isotopes?

a. Elements that have the same number of electrons

b. Elements that have the same number of protons

c. Elements that have the same number of neutrons

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4) Molecular formula of phosphoric acid?

a. H₂ SO₄

b. HCl

c. H3PO4

d. HNO3

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5) Molecular formula of sulfuric acid?

a. HNO3

b. H₂ SO₄

c. HCl

d. H3PO4

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

a. Number of protons

b. Number of neutrons

c. Number of electrons

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7) Which chemical element belong to halogen group?

a. oxygen

b. iodine

c. potassium

d. carbon

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8) Molecular formula of nitric acid?

a. H3PO4

b. HCl

c. HNO3

d. H₂ SO₄

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9) Which subatomic particle has no charge?

a. electron

b. proton

c. anion

d. neutron

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10) Which chemical element belong to halogen group?

a. fluorine

b. iron

c. cobalt

d. gold

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11) Which subatomic particle has negative charge?

a. proton

b. electron

c. neutron

d. cation

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12) Which subatomic particle has positive charge?

a. neutron

b. electron

c. proton

d. anion

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13) Empirical formula of hydrazine?

a. NH2

b. N2H4

c. N2H2

d. NH3

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14) Which chemical element belong to alkali metal group?

a. potassium

b. fluorine

c. calcium

d. magnesium

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

a. carbon

b. sodium

c. nitrogen

d. magnesium

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16) Which chemical element belong to alkali metal group?

a. Chlorine

b. magnesium

c. lithium

d. iron

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17) Empirical formula of hydrogen peroxide?

a. H2O

b. HO

c. HO2

d. H2O2

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18) Which chemical element belong to alkali metal group?

a. sodium

b. carbon

c. cobalt

d. gold

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19) Which chemical element belong to halogen group?

a. magnesium

b. calcium

c. lithium

d. chlorine

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20) 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. CH2O

b. C6H12O6

c. C2H4O2

d. C5H10O5

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