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Tenth Grade (Grade 10) Molecules and Compounds Questions

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Grade 10 Molecules and Compounds
Water acts as a solvent of ionic compounds because                                                    .
  1. water molecules are polar
  2. water takes the shape of its container
  3. water is found in three states of matter
  4. water is a liquid over a wide range of temperatures
Grade 10 Molecules and Compounds
What is the correct name for the compound MgO?
  1. magnesium trioxide
  2. dimagnesium trioxide
  3. magnesium oxide
  4. magnesium oxygen
Grade 10 Molecules and Compounds
Which is the correct formula for aluminum oxide?
  1. Al2O
  2. AlO3
  3. Al3O2
  4. Al2O3
Grade 10 Molecules and Compounds
A molecule is the smallest complete unit of a(n)                .
  1. compound
  2. matter
  3. atom
  4. property
Grade 10 Molecules and Compounds
The mass of one mole of a substance is called                  .
  1. molecular mass
  2. molar mass
  3. total mass
  4. none of the above
Grade 10 Molecules and Compounds

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The sum of the charges in an ionic compound must equal                .
  1. positive eight
  2. zero
  3. negative eight
  4. positive one
Grade 10 Molecules and Compounds
What is the correct name for the following compound: SO3?
  1. monosulfur oxide
  2. monosulfur trioxide
  3. sulfur trioxide
  4. sulfoxide
Grade 10 Molecules and Compounds
What is the formula for carbon tetrafluoride?
  1. C4F4
  2. CF4
  3. CF
  4. C4F
Grade 10 Molecules and Compounds
Water is a polar molecule. This means that
  1. the opposite ends of the molecule have opposite electrical charges.
  2. water molecules are linear, like a pole.
  3. water is one of the many hydrophobic molecules.
  4. the atoms in water have equal electronegativities.
Grade 10 Molecules and Compounds
What is the correct name for the formula PbS?
  1. Lead (I) sulfide
  2. Lead (II) sulfide
  3. Lead sulfate
  4. Lead sulfide
Grade 10 Molecules and Compounds

This question is a part of a group with common instructions. View group »

Which of the following compound does not contain a polyatomic ion?
  1. sodium carbonate
  2. sodium sulfate
  3. sodium sulfite
  4. sodium sulfide
Grade 10 Molecules and Compounds
What is the IUPAC name of CuCl2?
  1. copper (I) chloride
  2. copper (II) chloride
  3. copper (III) dichloride
  4. copper dichloride
Grade 10 Molecules and Compounds
What is the chemical formula for dinitrogen heptafluoride?
  1. N7F2
  2. N2F7
  3. NF12
  4. N2F9
Grade 10 Molecules and Compounds
According to VSEPR theory, the molecular geometry for CH+3 is
  1. tetrahedral.
  2. trigonal pyramidal.
  3. bent or angular.
  4. none of the above.
Grade 10 Molecules and Compounds
Which of the following is the formula for magnesium hydroxide?
  1. MgOH
  2. Mg(OH)2
  3. MgO
  4. MgH2O
Grade 10 Molecules and Compounds
What is the chemical name for HF?
  1. Hydrofluorous Acid
  2. Hydrofluoric Acid
  3. Perfluoric Acid
  4. Hypofluorous Acid
Grade 10 Molecules and Compounds
A substance is classified as either an element or a
  1. compound.
  2. solution.
  3. heterogeneous mixture.
  4. homogeneous mixture.
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