2005 WAEC SSCE Chemistry Past Questions

2005

All your burette readings (initial and final), as well as the size of your pipette, must be recorded but no account of experimental procedure is required. All calculations must be done in your answer book.A is a solution…

2005

Credit will be given for strict adherence to instructions, for observations precisely recorded, and for accurate inferences. All tests, observations, and inferences must be clearly entered in your answer book, in ink, at…

2005

(a) State what would be observed when:(i) Chlorine is passed through a freshly prepared solution of FeCl\(_2\).(ii) SO\(_2\) is bubbled into a solution of FeCl\(_3\);(iii) A few drops of water Is added to sodium hydroxid…

2005

(i) Name two amorphous forms of carbon(ii) State the reason why graphite is a lubricant but diamond is not.(iii) Draw and label a diagram for the laboratory preparation of a dry sample of carbon (IV) oxide.(b)(i) Give on…

2005

(a)(i) State the two types of hardness in water.(ii) Name a salt that causes each type of hardness.(ii) Write a balanced equation for the removal of each type of hardness.(iv) State one effect of hard water on soap.(b)(i…

2005

(a)(i) List three observable changes that take place when a dilute solution of copper (II) chloride is electrolysed using platinum electrodes. Stage III(ii) Calculate the quantity of electricity used during electrolysis…

2005

(i) Write the structure of 2 chloro-2 methylpropane.(ii) Consider the compound X represented by the structure below: I. State the functional group in X; II. Give the IUPAC name of X; Ill. State the homologous series to w…

2005

(a)(i) State Graham's law of diffusion(ii) If 100 cm\(^3\) of oxygen diffused in 4 seconds and 50cm\(^3\) of gas Y diffused in 3 seconds, calculate the relative molecular mass of gas Y. (0 = 16)(b) Consider the following…

2005

(a) The electronic configurations of atoms of elements A, B, C and D are given as follows: A. Is\(^2\)2s\(^2\)2p\(^2\); B. 1s\(^2\)2s\(^2\)2sp\(^1\) ; C. 1s\(^2\)2s\(^2\) 2p\(^1\) ; D. 1s\(^2\) 2s\(^2\)(I) Arrange the el…

2005

What is the mass number of an element having 20 neutrons, 15 protons and 15 electrons?

2005

The electronic configuration of an element X is 1s22s 22s63p 2 3p4. It can be deduced that X

2005

Which of the following can be used to predict the type of bonding in HCI?

2005

An element which can exist in two or more forms in the same physical state, exhibits

2005

An element X has an atomic number of 16. What is its most likely oxidation state in its binary compounds?

2005

Which of the following changes is characteristic of an alpha-particle emission?

2005

Which of the following sets of elements are arranged in order of decreasing atomic size in the Periodic Table?

2005

Which of the following factors does not affect the rate of reaction of CaCO3 with HCI?

2005

The activation energy of a reaction can be altered by

2005

2005 WAEC SSCE Chemistry Past Questions

All your burette readings (initial and final), as well as the size of your pipette, must be recorded but no account of experimental procedure is required. All calculations must be done in your answer book.A is a solution…

Credit will be given for strict adherence to instructions, for observations precisely recorded, and for accurate inferences. All tests, observations, and inferences must be clearly entered in your answer book, in ink, at…

(a) State what would be observed when:(i) Chlorine is passed through a freshly prepared solution of FeCl\(_2\).(ii) SO\(_2\) is bubbled into a solution of FeCl\(_3\);(iii) A few drops of water Is added to sodium hydroxid…

(i) Name two amorphous forms of carbon(ii) State the reason why graphite is a lubricant but diamond is not.(iii) Draw and label a diagram for the laboratory preparation of a dry sample of carbon (IV) oxide.(b)(i) Give on…

(a)(i) State the two types of hardness in water.(ii) Name a salt that causes each type of hardness.(ii) Write a balanced equation for the removal of each type of hardness.(iv) State one effect of hard water on soap.(b)(i…

(a)(i) List three observable changes that take place when a dilute solution of copper (II) chloride is electrolysed using platinum electrodes. Stage III(ii) Calculate the quantity of electricity used during electrolysis…

(i) Write the structure of 2 chloro-2 methylpropane.(ii) Consider the compound X represented by the structure below: I. State the functional group in X; II. Give the IUPAC name of X; Ill. State the homologous series to w…

(a)(i) State Graham's law of diffusion(ii) If 100 cm\(^3\) of oxygen diffused in 4 seconds and 50cm\(^3\) of gas Y diffused in 3 seconds, calculate the relative molecular mass of gas Y. (0 = 16)(b) Consider the following…

(a) The electronic configurations of atoms of elements A, B, C and D are given as follows: A. Is\(^2\)2s\(^2\)2p\(^2\); B. 1s\(^2\)2s\(^2\)2sp\(^1\) ; C. 1s\(^2\)2s\(^2\) 2p\(^1\) ; D. 1s\(^2\) 2s\(^2\)(I) Arrange the el…

What is the mass number of an element having 20 neutrons, 15 protons and 15 electrons?

The electronic configuration of an element X is 1s22s 22s63p 2 3p4. It can be deduced that X

Which of the following can be used to predict the type of bonding in HCI?

An element which can exist in two or more forms in the same physical state, exhibits

An element X has an atomic number of 16. What is its most likely oxidation state in its binary compounds?

Which of the following changes is characteristic of an alpha-particle emission?

Which of the following sets of elements are arranged in order of decreasing atomic size in the Periodic Table?

Which of the following factors does not affect the rate of reaction of CaCO3 with HCI?

The activation energy of a reaction can be altered by

In which of the following reactions is the position of equilibrium not affected by an increase in pressure?

The volume occupied by a given mass of gas depends on its