CHEMISTRY THIRD TERM EXAMINATION SENIOR SECONDARY SCHOOLS (SS 1) EXAM QUESTIONS

SECTION A – OBJECTIVES

INSTRUCTION – CHOOSE THE CORRECT ANSWER FROM THE OPTIONS A – D.

1. What is common to both hydrochloric acid and trioxonitrate (V) acid?

(a) Both are used for fountain experiment

(b) Both are mono Basic.

(c) Both are used to prepare hydrogen from zinc granules.

(d) Both attacked rubber.

 

2. A strong dilute H2SO4 ionizes ______.

(a) Slowly it contain more water than acid.

(b) Fast but contains acid more water than acid.

(c) Fast but contain more acid than water.

(d) Slowly but contains more acid than water.

 

3. Acid an hydride is the same as ______?

(a) Dry acid.

(b) Acid that increases its volume when exposed to air.

(c) Acid made by drying the reactants first.

(d) Acids made from oxides of non-metals.

 

4. The gas law represented by the mathematical expression P = P1 + P2 + P3 is ______.

(a) Avogadro’s law

(b) Dalton’s law of partial pressure

(c) Graham’s law of diffusion

(d) Boyle’s law

 

5. An oxonium is ______.

(a) H3O

(b) H3O-

(c) H3O+

(d) 2(H+ + OH-)

 

6. What type of bond holds hydrogen fluoride molecules together to form larger aggregates?

(a) Covalent bond

(b) Dative

(c) Dative (d) Ionic

(e) Metallic

 

7. pH of 0.001M of an acid is ______.

(a) 1

(b) 2

(c) 3

(d) 4

 

8. A solution Whose pH cannot be easily altered due to accidental addition of acid or base is called ______.

(a) Buffer solution

(b) Plasma

(c) Annotated solution

(d) Deionized water

 

9. Separation of mixtures of solids with various sizes can be done ______.

(a) Magnetic separation

(b) Coercing

(c) Sublimation

(d) Sieving

 

10. Which of the following is an example of a chemical change?

(a) Dissolution of salt in water

(b) Rusting of iron

(c) Melting of ice

(d) Separating of mixture by distillation

 

11. These are basic particles from which matter could be made except ______.

(a) Salt

(b) Atoms

(c) Ions

(d) Molecules

 

12. All of the following acid is monobasic except ______?

(a) Hydrofluoric acid

(b) Hydrochloric acid

(c) Ethanoic acid

(d) Tetraoxosulphate (IV) acid

 

13. Which of these requires crystallization most?

(a) Drug making

(b) Cement making

(c) Paint making

(d) Perfume making

 

14. Which one is the odd-one out?

(a) Air

(b) Urine

(c) Brass

(d) Sand

 

15. Chemical hypothesis is different from chemical law that ______.

(a) Hypothesis is not reasonable explanation to observation made while law is reasonable.

(b) Hypothesis is a reasonable explanation to observations while law is a statement from a scientist.

(c) Hypothesis is a reasonable explanation to observations while law is a statement which confirms the hypothesis after extensive tests.

(d) None of the above.

 

16. Separating funnel is used for separating a mixture of ______.

(a) Liquids with different boiling points

(b) Liquids with sediment

(c) Liquids with different color

(d) Liquids that are immiscible

 

17. Ability of an element existing in two or more physical states but maintaining the same chemical characteristics is called ______.

(a) Isotopy

(b) Isomerism

(c) Allotropy

(d) Detraction

 

18. Of the basic particles that make up an atom, the one with the smallest mass is ______.

(a) a proton

(b) a neutron

(c) an Atom

(d) an electron

 

19. The atomic mass of an element is mostly due to the mass of ______.

(a) electrons and protons

(b) electrons and neutrons

(c) protons and neutrons

(d) positions and neutrons

 

20. When graphite is subjected to a very high temperature and pressure for several hours in the presence of catalyst nickel, the products formed is ______?

(a) Soot

(b) Quartz

(c) Artificial Diamond

(d) Graphite flakes

 

SECTION C – ALTERNATIVE TO PRATICAL

21. ______ turns red litmus paper blue.

 

22. A fruit juice has a pH value of 5.5, this means that the fruit juice is ______.

 

23. Which of these is an indicator?

(a) Coke

(b) Palm oil

(c) Methyl orange

 

24. ______ is used to measure the volume of a base

(a) Pipette

(b) Burette

(c) Test tube

 

25. ______ is used to hold the test tube.

 

26. ______ has a sour taste.

(a) Acid

(b) Base

(c) Water

 

27. Which of these have no effect on litmus paper?

(a) acid

(b) base

(c) water

 

28. The solid substance that remains on the filter paper during filtration is called ______.

 

29. You are provided with the following laboratory apparatus give one use for each of the following pieces of apparatus.

(a) Reagent bottle

(b) beak

(c) funnel

(d) Wash bottle

(e) retort stand

(f) Evaporating dish

(g) Desiccator

(h) Tripod stand

(i) Test tube rack

 

30. Mention 3 basic rules and regulations regarding safety in the laboratory.

 

SECTION C – THEORY

INSTRUCTION – ATTEMPT 4 QUESTIONS ONLY IN THIS SECTION. 

QUESTION 1

A. What is an acid?

B. Mention 6 organic acids and their sources.

C. Give 3 uses of an acid.

 

QUESTION 2

A. What is basicity?

B. Give the basicity of the following acids.

I. H2SO4

II. HNO3

III. H3PO4

IV. C2H5COOH

 

QUESTION 3

A. What is a base?

B. Mention 3 physical properties of a base.

C. Give 3 uses of a base.

 

QUESTION 4

A What is pH?

B. Find the hydrogen and hydroxideion concentration

I. 0.01M tetraoxosulphate (VI) acid solution

II. 0.001M potassium hydroxide solution.

 

QUESTION 5

A. Define allotropes of carbon.

B. Mention 2 allotropes forms of crystalline carbon and 2 allotropes forms of amorphous carbon.

C. Give 2 properties of and 2 uses of diamond