Alkali, Alkaline Earth Metals and their compounds gce Revision questions o level

Alkali, Alkaline Earth Metals and their compounds Gce Revision questions

1, The element strontium (Sr) is placed below calcium in group ii of the Periodic Table.
The atomic number of strontium is 38 and its relative atomic mass (atomic weight) is 88.

a), How many electrons are present in the outer shell of strontium atom?

b), If the electronic configuration of the element of atomic number 35 is 2,8, 18, 7. What would you expect that of an atom of strontium to be?.

C), What is the composition of the nucleus of an atom of strontium?...

d), What would you expect the combination of strontium with chlorine to result from?

e, How many moles of electrons are involved in the electronic configuration of 88g of
strontium with chlorine?

f, How many faradays of electricity are needed to discharge 1 mole of strontium ions during electrolysis?

g), Strontium reacts with water.

i), Write down the names of the products that you would expect to be formed in this reaction

ii), Would you expect the rate of the reaction to be faster than, slower than or about the same as that of calcium with water under the same conditions?

2. An element with symbol X, (x is not the usual symbol of the element) is just below potassium on the periodic Table and above it on the electrochemical (activity) series

a), Write the formula of a compound of X in which X could be found naturally and suggest avpossible environment where this compound would be found.

b I) How would X be extracted from its compound in which it occurs?...

ii) How would x be stored?

b). i) Describe what you Would expect to see when a piece of x is put in water.
...
d). Write an equation for the reaction of X with water

e). Give the formulas of the nitrate and carbonate of X and give the equation for the reactionvwhen the nitrate is heated.

3. The elements of Group I and Group ll of the Periodic Table include the foliowing

Group 2

Berylliumn Magnesium Calcium Strontium

Group1

Lithium Sodium Potassium Rubidium

a), All these elements are similar in their properties but are grouped differently. On what
basis are they placed in different groups?

b), What would you SEE when a piece of

1). Potassium is added to cold water in a dish?...

ii), Calcium is added to cold water in a dish?...

c), Using X and Y as general symbols for Group i and Group ii elements respectively, write a general equation for the reaction of each group of elements with water.

d. Calculate the volume of hydrogen gas produced when 8g of calcium react completely with water at room temperature and atmospheric pressure.

e). Describe a simple physical test to distinguish between CaCl2 and SrCl2

4. Sodium hydroxide may be manufactured by the electrolysis of brine

a) What is electrolysis?.

b). i) What materials are the electrodes made up of?...

ii), Write equations for the reactions taking place at the cathode.

c). Sodium amalgam forms at the cathode and is made to react with water,

I) Give the product formed when sodium amalgam reacts with water..

ii) Name two by-products of the process and give one large scale use of each by-product

d), How would sodium hydroxide pellets be obtained from the solution?..

e,) Give two industrial uses of sodium hydroxide.
   

Meets up with settings of the G.C.E. Ordinary Level Chemistry examination organised by the Cameroon G.C.E. Board.

Essay questions and structural questions covering the whole of Ordinary Level Chemistry Syllabus from form three to five.

Use of Chemistry revision questions. 

Above questions are revision questions for "alkali, Alkaline earth metals and their compounds" for ordinary level (o level). 

Candidates can use the above questions to prepare for the Cameroon General certificate of examination board GCE chemistry.

The questions are not only for Cameroonians preparing for the G.C.E but they are revision questions for all students world wide preparing for the GCE or any other Examination.