Second Term Examination Physics and Chemistry for SS 1 – SS 3 Term 2 Exam Questions

CHEMISTRY AND PHYSICS

SECOND TERM EXAMINATION 

SS 1 – SS 3 EXAM QUESTIONS 

Scroll down for SS 2 – SS 3 exam questions.

SSS 1 PHYSICAL 

SECTION A

ANSWER ALL QUESTIONS. 

Instruction: Fill the gaps with the most suitable word from the options A – D.

1. The weight of a body is measured with ________.

(a) Spring balance

(b) Beam balance

(c) Lever

(d) Chemical balance

 

2. Which instrument is best for measuring small quantity of liquid?

(a) Burette

(b) Pipette

(c) Cylinder

(d) Beaker

 

3. Which of the following is not correct?

The SI unit of:

(a) Acceleration is ms-²

(b) Momentum is Ns

(c) Work is joule

(d) Energy is watt

 

4. What is the dimension of force?

(a) LT-1

(b) LT-2

(c) MLT-1

(d) ML-3

 

5. The heat from the sun reaches the earth mainly by the process of:

(a) Conduction

(b) Radiation

(c) Convection

(d) Reflection

Relevant links:

Second Term Examination Physics SS 2 – Exam Questions

6. In which of the following is the molecules of water moving fastest?

(a) Steam

(b) Ice

(c) Ice – Steam mixture

(d) Water

 

7. Calculate the Linear Expansivity of brass of length 120m, that assumes a new length of 120.05m, when heated through a temperature of 100ºC.

(a) 0.42 x 10-5K-1

(b) 0.6 x 10-4K-1

(c) 0.52 x 10-5K-1

(d) 0.44 x 10-4K-1

 

8. Using the Linear Expansivity calculated from question 3 above, determine the increase in volume of a brass container, with original volume (V1) equals 100m3, if heated through a temperature of 50oC.

 

9. Which of the following surfaces is the best absorber of radiant energy?

(a) White

(b) Black

(c) Red

(d) Yellow

 

10. All of these except one are applications of expansion in metals.

(a) Temperature control in laundry iron.

(b) Bimetallic strip Thermometer.

(c) Compensated balance wheel of a watch.

(d) Sagging of telegraph wires.

11. Circulation of fresh air in a room is as a result of?

(a) Radiation

(b) Convection

(c) Conduction

(d) Expansion

 

12. In Order to charge an electroscope by induction, the following processes can be followed:

I. Bring charge near the electroscope.

II. Touch the cap.

III. Remove the charge.

IV. Remove the finger.

 

(a) I – II – III – IV

(b) I – II – IV – III

(c) II – I – IV – III

(d) I – IV – II – III

 

13. Which of the following can be used to compare the magnitude of the charges on two given bodies?

(a) Glass Rod

(b) Gold – Leaf Electroscope

(c) Ammeter

(d) Capacitor

 

14. Which of the following rods acquire positive charge?

I. Polythene rubbed with silk.

II. Cellulose Acetate Rubbed with silk.

III. Glass rod rubbed with silk.

(a) II only

(b) I only

(c) I, II and III

(d) II and III only

 

15. The micrometer screw gauge is used for measuring ________.

SECTION B — THEORY 

Answer any 2 questions in this section. 

QUESTION 1

a. Differentiate between Heat and Temperature

b. List 5 effects of heat on matter.

c. List 5 kinetic molecular theory you know.

d. What is Thermal expansion of solid?

e. List 3 effects of expansion on everday’s life .

f. List 2 applications of expansion and explain any 1 .

 

QUESTION 2

a. Define Linear expansivity of solids .

b. The linear expansivity of a material is 15 x 10-5k — 1. If the initial area is 25m2,

calculate:

i. The increase in area if it is heated through 40ºC .

ii. Cubic expansivity.

 

c – i. State three (3) modes of transfer of heat.

c – ii. Describe each and explain their application in everyday life

 

QUESTION 3

a. Explain the term ‘Anomalous Expansion of water’

b. What materials are regarded as poor conductors? List 5 .

c. What are some applications of poor conductors?

 

QUESTION 4

a. Explain comprehensively ‘The gold-leaf Electroscope’

b. Explain the Process by which a lightning conductor works.

SSS 1 CHEMISTRY 

SECTION A

ANSWER ALL QUESTIONS. 

Instruction: Fill the gaps with the most suitable word from the options A – D.

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.

QUESTION 1

By means of Orbital Diagram, write down the Electronic Configuration of these elements –

I. Sodium

II. Chlorine

III. Sulphur

IV. Fluorine

V. Aluminium

VI. Magnesium

VII. Argon

VIII. Phosphorus

IX. Silicon

X. Neon

 

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

 

QUESTION 2

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

i. Electrovalent Combination

ii. Covalent Combination

iii. Co-ordinate Covalent Combination

 

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

 

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

i. Carbon(iv)Oxide

ii. Methane

iii. Calcium Oxide

iv. Ammonium Chloride

 

QUESTION 3

a. What are Isotopes?

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

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

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

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

 

QUESTION 4

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

b. State the Kinetic Theory of Gases

c. Explain and State what you Understand by:

i. Boyles’ Law

ii. Charles’ Law

iii. General Gas Equation

SSS 2 PHYSICS 

SECTION A

ANSWER ALL QUESTIONS. 

Instruction: Fill the gaps with the most suitable word from the options A – D.

1. Mercury is preferred to water as a thermometric liquid because:

(a) Mercury has a lower boiling point than water

(b) Mercury has uniform thermal expansion.

(c) Mercury has a lower co-efficient of expansion in relating to glass than water.

(d) Mercury does not wet glass.

 

2. Thermoelectric thermometers are used in the industries because:

(a) They measure very high temperature

(b) Other types of thermometers are not convenient in use in industry

(c) They are very responsive to temperature variations.

(d) A and C only.

 

3. Convert -10°C to °F.

(a) 40°F

(b) 50°F

(c) 14°F

(d) 28°F

 

4. Which of the following does not increase the sensitivity of a liquid in glass thermometer?

(a) A thick walled tube

(b) A Capillary tube with a narrow bore

(c) A thin walled tube

(d) A liquid with high Expansivity

 

5. How much heat is required to convert 20g of ice at 0oC to water at the same temperature? (S.H.C of ice = 335Jg-1

(a) 1.35 x 103J

(b) 5.38 x 103J

(c) 6.70 x 103J

(d) 7.06 x 103J

6. Which of the following statement is not correct?

(a) Evaporation takes place only at the surface of a liquid.

(b) Boiling takes place throughout the volume of a liquid

(c) Evaporation takes place at all temperatures

(d) The boiling point of a liquid is not affected by impurities.

 

7. Water in an open container boils at a lower temperature when heated of at the top of a mountain than at sea-level; Because at the top of the mountain:

(a) Relative Humidity is higher than at sea level.

(b) Rays of the sun adds more heat to the water.

(c) Temperature is lower than at sea level.

(d) Pressure is lower than at sea level.

 

8. An Electric Current of 3A Flowing through an electric heating element of resistance 20 ohms embedded in 100g of an oil, raises the temperature of the oil by 10oC in 10 seconds, then the S.H.C. of the oil is:

(a) 1.8Jg-1

(b) 0.6Jg-1

(c) 0.18Jg-1 oC-1

(d) 1.8Jg-1oC-1

 

9. Which of the following does not reduces the heat lost from a liquid in a Calorimeter?

(a) Lagging the Calorimeter

(b) Using an Insulating lid.

(c) Shielding the Calorimeter from draught

(d) Constantly stirring the liquid.

 

10. Calculate the heat energy required to convert 0.500kg of ice at 0oC to ice cold water at 0oC, if the S.L.H. of fusion of ice is 3.34 x 105kg-1

(a)1670 J

(b) 6680 J

(c) 167000 J

(d) 66800 J

Relevant links:

Second Term Examination Physics SS 1 – Exam Questions

 

11. Mist is formed when

(a) Clouds mix up.

(b) Water evaporates from oceans and exposed surfaces.

(c) Two warm air masses meet.

(d) Air cools when its relative Humidity is close to 100%.

 

12. Which of the following is/are correct?

I. Water expands on freezing

II. Ice expands on melting

III. Increased pressure lowers the melting point of ice

IV. Evaporation takes place from the surface of the liquid

 

(a) All the statements are correct

(b) I and IV are correct

(b) I, III, IV are correct

(d) I, II and III are correct

 

13. A body is projected vertically upward with a velocity of 10 m/s. Calculate the maximum height reached. (neglect all air resistance and assume g = 10 m/s)

(a) 5m

(b) 10m

(c) 15m

(d) 20m

 

14. Which of the following is not correct about projectile?

(a) The motion along the horizontal is constant.

(b) The motion along the vertical varies.

(c) It has a vertical downward acceleration.

(d) The motion carries out one independent motion.

 

15. A tennis ball is thrown with a velocity of 3m/s at an angle of 300 to the horizontal, Calculate the time of flight in seconds. (Take g = 9.8ms-2)

(a) 5.2

(b) 2.6

(c) 0.3

(d) 0.15

SECTION B — THEORY

Answer all Questions in this section.

QUESTION 1

a. List 4 differences between heat and temperature.

b. List 4 types of thermometers, stating the thermometric substance each is using.

c. List 4 advantages of using mercury over alcohol as a thermometric substance.

 

d. Convert:

i. 80oC, -30°C to oF and Kelvin respectively

ii. -40oF, 70°F to oC and Kelvin respectively

 

QUESTION 2

a. Define the following:

i. Specific Heat Capacity

ii. Specific Latent Heat

 

b. With a well Labeled diagram, Explain how you can determine the specific heat capacity of a substance through electrical method.

 

QUESTION 3

a. Assuming that the S.H.C of water is 4180j/kg/k, how long will it take to heat 3kg of water from 28oC to 88oC, using electric kettle which taps 6A from 220V supply?

 

b. An electric heater is used in heating 100g of water from 50oC to 100oC,. Calculate the time, t, during which the current flowed. Neglect the S.H.C of the calorimeter, assume that the S.H.C of water is 4200j/kg/k, and the power of heater is 50W.

SSS 2 CHEMISTRY 

SECTION A

ANSWER ALL QUESTIONS. 

Instruction: Fill the gaps with the most suitable word from the options A – D.

1. Flow of current in electrolytes is due to the movement of

(a) Electrons

(b) Holes and Electrons

(c) Ions

(d) Charges

 

2. What quantity of electricity was consumed when 10A was consumed in 1hr during Electrolysis.

(a) 36KC

(b) 3600C

(c) 7200C

(d) 72KC

 

3. Calculate the mass of aluminium deposited when a current of 3.0A is passed through an aluminium electrolyte for 2hrs.

(a) 1.0g

(b) 6.04g

(c) 4.04g

(d) 2.02g

(Al = 27, 1F = 96500)

 

4. One faraday is equal to _________.

(a) 9650C

(b) 96500C

(c) one mole of electron

(d) 965C

Relevant link – Second Term Examination Chemistry SS 1

 

5. Rate of reactions depends on the following factors except:

(a) Rate at which gas is evolved.

(b) Rate at which colour of reactions change.

(c) Rate at which products are formed.

(d) Rate at which the reactants diminish.

6. The unit of rate of a chemical reaction is:

(a) Moldm-3S-1

(b) Mol-1S-1

(c) Mol-1

(d) SMol-1

 

7. If 2g of zinc granules was reacted with excess dilute HCL to evolve hydrogen gas which came to completion after 5 mins. Calculate the rate of the chemical reaction in ghr-¹.

(a) 48ghr-¹

(b) 12ghr-¹

(c) 24ghr-¹

(d) 240ghr-¹

 

8. The minimum or critical amount of energy required before a chemical reaction could occur Is called _________.

(a) Reaction Energy

(b) Effective Collision

(c) Activation energy

(d) Minimum Energy

 

9. Reaction occurs when the colliding reactant particles _________.

(a) Have energy less then the energy barrier.

(b) have energy equal or greater than the energy barrier.

(c) have energy less than the effective collision.

(d) have energy greater than that of the products.

 

10. These are factors affecting chemical reactions except _________.

(a) surface Area

(b) catalyst

(c) nature of the Reactants

(d) activating Energy

11. Two boys balanced steady in a see-saw game is an example of _________.

(a) Static Equilibrium

(b) dynamic Equilibrium

(c) Homogenous Equilibrium

(d) Mutual Equilibrium

 

12. Factors affecting Equilibrium reactions includes the following except ________________.

(a) Pressure for solids

(b) Concentration

(c) Temperature

(d) Pressure for gases

 

13. In most Equilibrium reactions, catalyst is not required because _________.

(a) Catalyst reduces the energy barrier

(b) Most catalyst are easily poisoned when wrongly chosen

(c) Catalyst favours both forward and backward reactions

(d) Catalyst could be positive or Negative

 

14. 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

 

15. What is the chemical Formular for Manganese?

(a) Mn

(b) Mn

(c) mN

(d) MN

SECTION B — THEORY

Answer all Questions in this section.

QUESTIONS 1

a. What is rate of Reaction?

b. List 5 ways of determining rates of reaction.

c. Explain comprehensively what you understand by ‘Collision Theory’.

d. List and Explain 5 factors that affects the rates of a reaction.

 

QUESTION 2

a. Explain comprehensively ‘Chemical Equilibrium’

b. List 5 Properties(characteristics) of a system existing in chemical equilibrium

c. Explain ‘Equilibrium in reversible reaction’.

 

QUESTION 3

a. State Le Chatlier’s Principle

b. List and explain fully the conditions at which equilibrium state is dependent on.

 

SS 3 Chemistry and Physics are work in progress… 

SSS 3 PHYSICAL 

SECTION A

ANSWER ALL QUESTIONS. 

Instruction: Fill the gaps with the most suitable word from the options A – D.

SSS 3 CHEMISTRY 

SECTION A

ANSWER ALL QUESTIONS. 

Instruction: Fill the gaps with the most suitable word from the options A – D.