CHEMISTRY 1P00

Sample Questions, Chemical Compounds

1. The figures shown below are particulate (submicroscopic) representations of various states of matter.

Answer the following questions by giving the letter of the figure that corresponds to the description. Drawings may be used more than once or not at all. There may be more than one answer to a given question.
Write "NONE" if no drawing fits the description.
(i) Which drawing(s) represent submicroscopic particles in a sample of an element?
(ii) Which drawing(s) represent submicroscopic particles in a gas?
(iii) Which drawing(s) represent submicroscopic particles in a sample of a liquid compound?
(iv) Which drawing(s) represent submicroscopic particles in a sample of a molecular solid?
(v) Which drawing(s) represent submicroscopic particles in a sample of a heterogeneous mixture?
(vi) Which drawing(s) represent submicroscopic particles in a sample of an ionic solid?
(vii) Which drawing(s) represent submicroscopic particles in a sample of a compound?
(viii) Which drawing(s) represent submicroscopic particles in a gaseous mixture?
(ix) Which drawing(s) represent submicroscopic particles in a gaseous compound?

2. What is the formula of sulfuric acid?

3. What is the formula for calcium chloride?

4. What is the formula for iron(III) oxide?

5. What is the systematic (IUPAC) name of P₄O₁₀?

6. What is the systematic (IUPAC) name of Cu(NO₃)₂?

7. Which of the following compounds is (are) ionic?

SO₃ FeSO₄ PCl₅ HCl NaF

8. What is the oxidation number of phosphorus in H₃PO₃?

9. What is the oxidation number of nitrogen in Ca(NO₂)₂?

10. What is the oxidation number of sulfur in Na₂S₂O₃?

11. Which of the following Lewis (electron-dot) structures is/are wrong. (Give their letters.)

(a) SO₂ (b) NH₃ (c) NO₂⁺ (d) NH₄Cl (e) NH₄Cl

12. What do the letters VSEPR stand for?

13. Describe the geometric shapes of the molecules or ions whose Lewis structures are shown below. Your choices are

linear

bent

triangular planar

tetrahedral

square planar

triangular pyramid

triangular bipyramid

octahedral

T-shape


(a) H₂O	(b) SO₄^2-	(c) CO₂	(d) XeO₃	(e) NO₂^-

Answers

Back to Chemistry 1P00 Assessment Test

Back to Chemistry 1P00 Homepage

This page is http://chemiris.labs.brocku.ca/~chemweb/courses/chem100/compounds.html

Last revised: May 2 2001 by M. F. Richardson