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Chemistry Form Two Question Paper

Chemistry Form Two

Course:Chemistry

Exam Year:2012

LANGATA HIGH SCHOOL
FORM TWO - CAT TWO CHEMISTRY
TIME: 1 HR

1. Magnesium sulphate salt can be prepared by reacting a dilute acid and a given metal.
a. Which acid is used in preparation of the salt named above? (1mk)
b. Write an equation for the reaction between a metal and dilute acid above. (1mk)
c. Why is this method of preparing salt unsuitable to prepare Barium Sulphate. (1mk)
d. Why is this method of preparing salt unsuitable to prepare copper (II) sulphate (1mk)

2. By use of an equation, define salt. (2mks)

3. A divalent metal M has a mass number of 119 and has 69 neutrons in its nucleus.
a. What is its atomic number (1mk)
b. What is the number of electrons (1mk)

3. Name two alkali metals. (2mks)
4. Give four properties of alkali metals (4mks)

6. Hydrogen is prepared in the lab by reacting zinc with dilute sulphuric acid in the presence of a catalyst.
a. What catalyst is used. (1mk)
b. Write an equation for the reaction. (1mk)
c. Give two physical properties of hydrogen. (2mks)
d. List two uses of hydrogen. (2mks)

7. Both graphite and diamond are allotropes of carbon. Graphite conducts electricity but diamond does not conduct. Explain. (4mks)

8. What is an ionic bond? (1mk)

9. Give three properties of a substance with giant ionic structure. (3mks)

10. What flame is produced by bunsen burner when air hole is open. (1mk)

11. State three properties of a substance with a giant ionic structure. (3mks)

12. Name the method by which the following mixtures can be separated.
a. Water and ethanol. (1mk)
b. Pure water from sea water. (1mk)
c. Iron fillings from sulphur powder. (1mk)

13. What is the difference between a filtrate and a distillate. (2mks)

14. Complete the following equation.
Acid + Metal oxide ........ (1mk)
Acid + Carbonate ........ (1mk)
Metals burn in oxygen to give. (1mk)

15. An element X, consists of three isotopes with mass number of 22, 24, and 25 with percentage of the most abundance of 89.6%, 6.4% and 4.0% respectively. Find the relative atomic mass of element X. (4mks)

16. Write equations for the following reactions.
a. Sodium with water. (1mk)
b. Sulphur with oxygen. (1mk)
c. Magnesium with steam. (1mk)

Chemistry Form Two Question Paper

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