1st Mid-Term
General Chemistry (CHEM-104)
Student name:
Answer the following questions:
I. Put circle around the correct answer of the following questions (20 marks) :
1. The chemical bonding in CH4 is :
(a) polar covalent bond
(b) ionic bond
(c) non-polar covalent bond
(d) metallic bond
2. Ionic bond is taking place between:
(a) atoms of two non-metals
(b) atoms of metal and non-metal
(c) atoms of two metals
(d) All answers are wrong
3. The electron configuration of sodium atom (atomic number = 11) is:
(a) 1s2 2s22p6 3p1
(b) 1s2 2s22p63s1
(c) 1s2 1p2 2s22p5
(d) All answers are wrong
4. The extremely small, invisible, and indivisible particles were called:
(a) molecules
(b) compounds
(c) atoms
(d) elements
5. From the colligative properties of solutions:
(a) Vapor pressure
(b) Osmosis
(c) Elevation of boiling point
(d) Freezing point
6. The oxidation number of manganese in KMnO4:
(a)
+7
(b) -7
(c)
+1
(d) -1
7. The chemical bonding in Cl2 is :
(a) covalent bond
(c) coordinate covalent bond
(b) ionic bond
(d) metallic bond
1
8. Dalton's Atomic Theory is called:
(a) Solar system model
(b) Modern atomic theory
(c) Electron shell model
(d) Quantum Mechanical Model
9. Triple covalent bond is formed by:
(a) sharing of three pairs of electrons between two non-metallic atoms
(b) sharing of three pairs of electrons between two metallic atoms
(c) sharing of three pairs of electrons between metallic and non-metallic atoms
(d) All answers are wrong
10. The coordinate covalent bond formed between donor and acceptor atoms where:
(a) the donor atom sharing by its non-bonding electrons
(b) the acceptor atom accepts electrons in its empty orbital
(c) Both a and b together
(d) All answers are wrong
Q2. Write-down the class of the chemical reaction in the following table:
2
Q3. A solution used for intravenous feeding contains 4.8 g of glucose, C6H12O6 , in
90.0 g of water. What is the molality of glucose ?
Q4. A 25.0 mL of alcohol is placed in a container and sufficient water is added to
bring the volume of the solution up to 225 mL. Find the percent alcohol by volume?
Atomic weight of some atoms:
C= 12
H= 1
O= 16
With my best wishes
3