BETHEL CITY COLLEGE KUOLA APATA IBADAN

Third term Examination

Session 2023/2024. Class: SS 1 Time: 2 hrs
1. Which of the following is not a separation technique? (a) fractional distillation (b)
propiation (c) Precipitation (d) Chromatography
2. Substances that cannot be split into two or more simpler units through ordinary
chemical is known as (a) Elements (b) compound (c) mixture (d) solvent
3. Easy reversibility is a characteristics of chemical change (a) True (b) False (c)
All of the above (d) None of the above
4. Sodium is _________ number of the periodic table? (a) 10 (b)15 (c)11 (d)17
5. A substance that is the smallest particle of an element which can take place in a
chemical reaction is (a) atom (b) Mole (c) Ion (d) Atomic
number’
6. When a bottle of coca-cola is opened, the bubble of gas evolves. The gas is ___ (a)
Hydrogen (b) carbondioxide (c)carbonmonooxide (d) Sulphur
7. The atomic number of caesium is 55 and iits atomic mass is 133. The nucleus of
caesium atom contains (a) 78 protons and 55 electrons (b) 55 protons and 78
neutrons (c) 55 protons and 78 electrons (d) 78 protons and 55 neutrons
8. The combining power of an element is called? (a) valency (b) electron (c) mixture
(d) Atom
9. Fluorine has ____ number of protons? (a) 12 (b) 9 (c)14 (d)13
Use the information to answer the following question
10. If an element X has an atomic number of 15 and a molecular number 25. It would be
represented by _______
11. It has ___ number of neutrons. (a) 10 (b) 15 (c) 25 (d) 20
12. It has ____ number of protons. (a) 10 (b)15 (c)25 (d)20
13. If the electronic configuration is 2,8,8,7. What is the valency of this element (a) -2
(b)+3 (c)-1 (d) -4
14. The IUPAC name for Na2SO4 is (a) sodium (iv) sulphate (b) Sodium
teraoxosulphate (vi) (c) sodium teraoxide (d) sodium (vi)sulphate
15. Precipitation is a separation technique that allows the use of a Bunsen burner? (a)
True (b) False (c) None of the above (d) All of the above
16. If an element is represented as 35.5. what is the name of the element (a) carbon
(b) fluorine (c) chlorine (d) iodine
17. Salt in water can be separated by which separation technique? (a) Fractional
distillation (b) Evaporation (c) Precipitation (d) Chromatography
18. Acid turns blue litmus paper _____? (a) Red (b) Colourless (c) green (d) Red
19. Acids are characterized by (a) bitter taste (b) soapy taste (c) sour
taste (d) all listed
20. An element existing in two or more physical states and maintaining the same
chemical charcateristics is called______ (a) isomers (b) allotropes (c) isolapes
(d) cirapdile
21. Diamond crystals are of _____shape (a) tetrahedral (b) pertshadral (c)
octahedral (d) triangular
22. An acid is a substance which in the presence of water produces _____(a) salts (b)
oxygen(c) hydroxonium ions (d) effervescence
23. The general methods of preparing salts include i. Neutralization ii. Precipitation
iii. Double decomposition iv. Action of an acid on a metal. (a) iv only (b) I and ii
(c) iii and iv (d) i,ii,iii and iv.
24. Alums are classified as (a) basic salts (b) acids salts (c) double salts (d)
anhydrous salts
25. Kipp’s apparatus is an instrument for preparing intermittent supply of gases by
reacting (a) liquid with gas (b) liquid with solid (c) solid with gas (d) liquid
with liquid
26. Fine chemicals have the following characteristics except (a) they are chemically pure
(b) they are produced by batch process (c) they are produced in large
quantity because of high applicability (d) they are produced in small quantity
because of limited applicability
27. Exceptional large number of carbon compounds is essentially due to the ability of (a)
carbon to catenate liberally (b) various groups to catenate (c) Nitrogen.
Hydrogen, Phosphorus and the halogens to catenate within themselves
28. Universal indicator is added to a colorless solution and turns dark blue. What does
this tell you? (a) it is an acid (b) it is neutral (c) it is an alkali (d) it is a salt
29. Which of the following can be used to neutralize acidic soil? (a) sodium chloride (b)
calcium oxide (c) sulfuric acid (d) nitrous oxide
30. When performing an acid-alkali titration, what piece of apparatus is mused to place
a fixed volume of the first solution into the conical flask? (a) burette (b)pipette
(c) beaker (d) test tube.

SECTION B: Answer all the questions in this section

1. State Dalton’s law of partial pressure. In a gas jar containing a gas and water, what’s
total pressure composed of

(b) 272cm3 of carbon(iv) oxide were collected over water at 15°c and 782mmHg
pressure. Calculate the volume of the dry gas at s.t.p (s.v.p of water at 15°c is 12mmHg)

© A given mass of nitrogen is 0.12dm3 at 60°c and 1.01 x 105 Nm-2. Find its pressure at
the same temperature if it’s volume is changed to 0.24dm3.

2a. Define an acid

b. Give the natural sources of the following organic acids (I) lactic acid (ii) ascorbic acid
(iii) amino acid

© How would you prove that a given colourless liquid is an acid?

BETHEL CITY COLLEGE KUOLA APATA IBADAN
Third term Examination
Session 2023/2024. Class: SS 2 Time: 2 hrs 30 mins
Section A : Objective answer the given set of questions

1. What is the electronic configuration of sodium? (a) 1s2 2s2 2P6 3s5 (b) 1s2 2s2 2P6
3s2 (c) 1s2 2s2 2P6 3S1 (d) 1s2 2s2 2P6 3s0 (e) 1s2 2P6 3s2 3P6 4s1
2. Which of the following statements is true? (a) an increase in temperature increases gas
molecules (b) Increase in temperature doesn’t affect kinetic energy (c) Increase in
temperature is proportional to volume (d) decrease in pressure decreases gas
molecules
3. An element is said to be electronegative if (a) if it is an halogen (b) if it is an alkali
earth metal (c) if it is an alkali (d) if it is an acid
4. An isotope has an atomic number of 17 and a mass number of 36, which of the following
gives the correct number of protons and neutrons in an atom of the isotope?
Neutrons protons
(a) 53 17
(b) 17 36
(c) 19 17
(d) 36 17
Use this information to answer the following questions. Four elements P,Q,R,S have
atomic number 4,10,12 and 14 respectively.
5. Which is a noble gas (a) P (b) Q (c) R (d) S
6. Which is an alkali-metal (a) P (b) Q (c) R (d)S
7. Which is an alkali-earth metal (a) P (b) Q (c)R (d)S
8. The element with electronic configuration 1s2 2s2 2P3 is a (a) oxygen (b)
chlorine (c) nitrogen (d) calcium
9. How many electrons ae in L shell (a) 2 (b) 5 (c)8 (d)16
10. A catalyst speed up the rate of reaction by (a) taking part in a reaction (b) lowering
the activation energy of the reaction (c) increase the heat content 9(d)
increase the activation energy
11. The electronic configuration of two atoms X and Y are as follows: X- 1s2 2s2 2P6 3s2
Y- 1s2 2s2 2P6 3s2 3P6 4s2. Which of the following statement is correct about the
position of elements X and Y in the periodic table (a) X belongs to group 1, Y belongs
to period 2 (b) X belongs to group 1 , Y belongs to period 1 (c) X belongs to
group 2, Y belongs to period 1 (d) X belongs group 3, Y belongs to period 2
12. The electronic configuration 1s2 2s2 2P6 3s2 3P6 is that of a (a) noble gas (b) group
11 (c) group 3 element (d) group vi element
13. Which of the following statements is not correct (a) diatomic (b) good oxidizing
agents (c) highly electronegative (d) have high electron affinity
14. An element whose atomic number 19 has the electronic configuration (a) 1s2 2s2
2p6 3s2 3p7 (b) 1s2 2s2 2P6 3s2 3P2 3P6 3d1 (c) 1s2 2s2 2P6 3s2 3P6 9d)
1s2 2S1 2P6 3s2 3P6 4s2
15. Chlorine is used in water treatment as a (a) germicide (b) decolorizing agent (c)
an antioxidant (d) a coagulating agent
16. The valency of chlorine is (a) -1 (b) +1 (c) -3 (d) +5
17. Isotopy is observed in which of the following element (a) chlorine (b)carbon (c)
oxygen (d)fluorine
18. The position of an element on the periodic table is determined by its (a) its density
(b) atomic radius (c) atomic number (d) neutron number
19. What is the molar mass of alkyne with the formula CxH14 (H=1, C=12) (a) 86g (b)
92g (c) 98g (d)110g (e) 112g
20. Which of the following is not a separation technique. (a) distillation (b) propiati(c)
chromatography (d) distillation
21. Which of the following is not an halogen (a) silicon (b) fluorine (c) astatine 9d)
bromine
22. An atom X consists of 6 protons, 6 electrons and 7 neutrons. Which of the following
representation of an atom is correct. (a) 13 6 X (b) 13 7 X (c) 19 6 X (d) 19 7
X
23. An atom of an element X gains two electrons. The symbol of the ion fomed is a 9a) X
(b) X+ (c) X2+ (d) X2-
24. In the periodic table, all the elements within the same group have the same (a)
number of neutron (b) number of valency electron (c) number of isotopes (d)
atomic number
25. In the periodic table, alkaline earth metals can be found in group (a) 1 (b) 2 (c)
6 (d) 7
26. Which of the following element is a metalloid (a) carbon (b) oxygen (c) silicon
(d) sodium
27. The shape of graphite crystals is a (a) tetrahedral 9B0 pyramidal (c) hexagonal (d)
octahedral
28. The activation energy of a reaction can be altered by (a) adding reducing agent (b)
applying high pressure (c) using a catalyst (d) changing the temperature
29. The phenomenon observed when particles of colloidal solution block the part of
light rays and scatter them is known as (a) diffusion (b) Tyndale effect (c) dialysis
(d) Brownian movement
30. A consequence of global warming is (a) air pollution (b) water pollution (c)
increased humidity (d) flooding
 THEORY

Question no 1 is compulsory and answer any other two (2) questions

1a. Define the following (i) atom (ii) molecule (iii) valency (iv) compound

b. list three differences between chemical and physical change

c. differentiate between an acid and an alkali

2a. Write the characteristics of (i) electrovalent compounds OR (ii) alkali earth metals

b. state the lechatelier’s principle

c. state three factors that affect the rate of reaction

CLASS: S S 2
SUBJECT: CHEMISTRY
1.What is the electronic
configuration of sodium?
2 6 2 2 2
1S25 2P 35 (b)15 25 2P
6 2 2 2 6 1
35 (c)15 25 2P 35
2 2 6 0
(d) 15 25 2P 35 (e)
2 6 2 6 1
15 2P 35 3p 45
2.Which of the following
statements is true?
(a)An increase in
temperature increases
number gas molecules.
(b)Increase in temperature
does not affect kinetic
energy
©Increase in temperature
is proportimal to volume
(d) decrease in pressure
decrease number of
gasmol.
3. An element is said to be
electronegative if
a.If is an halogen b.If is an
Alkali earth metal c.If is an
Alkali
4.What is the consequence
of increasing the
equilibrium reaction?
Zn0(g) +theg = Zn (g) +
H20(L)
a.Equilibrium is driven to
the left b.Equilibrum is
driven to the right c.There
is no effect d.More
Zn0(s) is produces
5. An isotope has an
atomic number of 17 and a
mass number of 36, which
of the following gives t
3a.. Calculate the amount of gold deposited when a current of 5A is passed through a
solution of gold salt for 2 hours 15 minutes. If the same current it used, find the time
taken for 6.0g of gold to be deposited. (Au =197, 1 Faraday = 96500 C).

b. State Faraday’s laws of electrolysis

c. State three (3) uses of electrolysis

4a. Define the following (I) electrolysis (ii) electrodes (iii) electrolytes

b. Write a balanced ionic equation for the redox reaction between acidified potassium
tetraoxomanganate (vii) and iron (ii) tetraoxosulphate (vi)

c. Define the following (I) oxidizing agents (ii) reducing agents. (iii) Give three examples
of both ( oxidizing agents and reducing agents)
CLASS: S S 2
SUBJECT: CHEMISTRY
1.What is the electronic
configuration of sodium?
2 6 2 2 2
1S25 2P 35 (b)15 25 2P
6 2 2 2 6 1
35 (c)15 25 2P 35
(d) 1522522P6350 (e)
1522P63523p6451
2.Which of the following
statements is true?
(a)An increase in
temperature increases
number gas molecules.
(b)Increase in temperature
does not affect kinetic
energy
©Increase in temperature
is proportimal to volume
(d) decrease in pressure
decrease number of
gasmol.
3. An element is said to be
electronegative if
a.If is an halogen b.If is an
Alkali earth metal c.If is an
Alkali
4.What is the consequence
of increasing the
equilibrium reaction?
Zn0(g) +theg = Zn (g) +
H20(L)
a.Equilibrium is driven to
the left b.Equilibrum is
driven to the right c.There
is no effect d.More