Second Term Examination Chemistry SS 1

 

CRN INTERNATIONAL SCHOOL 

CHEMISTRY 

SECOND TERM EXAMINATION 

SENIOR SECONDARY SCHOOL – SS 1

 

 

SECTION A – OBJECTIVES

Answer all questions.

 

1. Which of the following does not support the phenomenon of Kinetic Theory.

(a) Brownian Motion

(b) Diffusion

(c) Osmosis

(d) Linear Expansivity

 

2. P1V1 = P2V2 supports ___________________.

(a) Charles’ Law

(b) Boyles’ Law

(c) Grahams’ Law

(d) Avogadros’ Law

 

3. One of the following is not a chemical ___________________.

(a) Rusting

(b) Sublimation of solids

(c) Slaking of quicklime

(d) Fermentation of glucose

 

4. The percentage of oxygen in SO2 is ___________________.

(a) 50%

(b) 5%

(c) 200%

(d) 500%

 

(S = 32, O = 16)

 

Relevant link – Second Term Examination Chemistry SS 2

 

5. The relative molecular mass of lead (ii) trioxonitrate (v) [PbNO3 ] is

(a) 170

(b) 269

(c) 232

(d) 132

 

(Pb = 207, N = 14, O = 16)

 

 

6. The relative molecular mass of Al2O3 is

(a) 102

(b) 64

(c) 156

(d) 84

 

(Al = 27, O = 16)

 

7. Arrangement of ions in a regular pattern in a solid crystal is called ___________________.

(a) Configuration

(b) Atomic Structure

(c) Lattice

(d) Buffer

 

8. Rare gases are stable because they ___________________.

(a) are Monoatomic

(b) are Volatile gases

(c) forms ions easily

(d) have duplet or octet electronic configurations in the outermost shell of the atom.

 

9. Which element has an electronic configuration is 1S2 2S2 2P6 3S1

(a) Calcium

(b) Chlorine

(c) Sodium

(d) Nitrogen

 

10. Determine the maximum number of electrons that can occupy the principal energy level N of an Atom ___________________.

(a) 18

(b) 8

(c) 24

(d) 32

 

 

11. An Element belongs to a period on the periodic table because of ___________________.

(a) The number of electrons in its Outermost Shells

(b) The Shell Number

(c) The Electronic Configuration in the Azimuthal quantum number

(d) the size of the Atom

 

12. Which of the three states of matter has no fixed shape, no fixed volume and least dense?

(a) Liquid

(b) Gas

(c) Solid

(d) Crystal

 

13. The escape of molecules with more than the Average Kinetic energy of the molecule is called ___________________.

(a) Melting

(b) Freezing

(c) Evaporation

(d) Efflorescence

 

14. Water exists as a solid, liquid and gas respectively because water:

(a) Is Colorless

(b) Is Electrovalent

(c) In any state possesses a certain degree of motion in the molecules.

(d) Is Molecular

 

15. The Phenomenon whereby the atmospheric pressure is equal to the Saturated vapour pressure is called ___________________.

(a) Freezing

(b) Latent Heat

(c) Boiling

(d) Normal Pressure

 

 

SECTION B —THEORY 

Answer any 3 Questions in this section.

 

1a. By means of Orbital Diagram, write down the Electronic Configuration of these elements

a. Sodium

b. Chlorine

c. Sulphur

d. Fluorine

e. Aluminium

f. Magnesium

g. Argon

h. Phosphorus

i. Silicon

j. Neon

1b. State the Principle that governs the filling of Electrons into Orbitals.

 

2a. Write briefly on the following giving an illustrated example of each

i. Electrovalent Combination

ii. Covalent Combination

iii. Co-ordinate Covalent Combination

2b. List 4 difference between the compounds formed by Electrovalent bonds and Covalent Bonds.

2c. What are the bond types present in each of the following compounds

i. Carbon(iv)Oxide

ii. Methane

iii. Calcium Oxide

iv. Ammonium Chloride

 

3a. What are Isotopes?

3b. Name any two element that exhibits Isotopy and give their Respective Isotopes

3c. Explain why the Reactive atomic Mass of chlorine is 35.5

3d. The Atomic Number of Sodium is 11 and its Relative atomic mass is 23:

i. How many protons, electrons and Neutrons are in the sodium atom?

 

4a. State the Kinetic theory of matter and outline 3 natural phenomenal which supports it

4b. State the Kinetic Theory of Gases

4c. Explain and State what you Understand by:

i. Boyles’ Law

ii. Charles’ Law

iii. General Gas Equation

 

Goodluck!

 

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