- 1. Acids are substances that ionize in ____ solution.
A) Acidic
B) Watery
C) Aqueous
D) Thick
- 2. The pH scale is used to measure the concentration of _____ ions.
A) oxygen
B) chlorine
C) nitrogen
D) hydrogen
- 3. Which of the following is not involved in neutralization?
A) acids
B) salt
C) gas
D) base
- 4. The arrangement of the periodic table is based on____
A) change in atomic number
B) change in colour
C) change in taste
D) change in solubility
- 5. Transition metals are found in____
A) p-block
B) f-block
C) d-block
D) s-block
- 6. What is the main use of a bunsen burner?
A) To store chemicals
B) To filter solutions
C) To heat substances
D) To measure volume
- 7. Which is a strong acid?
A) Na2CO3
B) NaOH
C) NaCl
D) HCl
A) a strong acid
B) a soluble base
C) an insoluble base
D) a salt
- 9. The reaction between acids and metals produce____
A) oxygen and water
B) salt and hydrogen gas
C) salt and water
D) base and hydrogen gas
- 10. Which of the following is used in antacids?
A) Reduction
B) Combustion
C) Oxidation
D) Neutralization
- 11. Which of the following is a noble gas?
A) Helium
B) Chlorine
C) Sodium
D) Oxygen
- 12. Elements in the same group have the same___
A) state
B) mass
C) colour
D) properties
A) liquid
B) noble gas
C) metal
D) non-metal
- 14. If 2 moles of hydrogen gas(H2) react with oxygen gas(O2), how many moles of H2O is formed?
A) 3 moles
B) 4 moles
C) 1 mole
D) 2 moles
- 15. Which indicator is pink in base?
A) Phenolphthalein
B) Methyl black
C) Litmus
D) Methyl orange
- 16. Which has the highest electronegativity?
A) Chlorine
B) Sodium
C) Potassium
D) Magnesium
- 17. Which bond is formed in HCl?
A) Acidic
B) Metallic
C) Covalent
D) Electrovalent
- 18. Which has the lowest ionization energy?
A) Argon
B) Neon
C) Sodium
D) Chlorine
- 19. White precipitate with AgNO3 indicates _______
A) Copper ions
B) Sulphate ions
C) Calcium ions
D) Chloride ions
- 20. If 50cm3 of 0.2mol/dm3 hydrochloric acid is completely neutralized by sodium hydroxide solution, what volume of 0.1 mol/dm3 NaOH is required?
A) 100cm3
B) 50cm3
C) 25cm3
D) 200cm3
- 21. A solution has a pH of 3. Which of the following statement is correct about the solution?
A) It is strongly basic
B) It is acidic and has high concentration of H+ ions
C) It is a basic and has low concentration of H+ ions
D) It is a neutral
- 22. When an acid reacts with carbonate, which products are formed?
A) Salt only
B) Salt, water, and carbon dioxide
C) Base and gas
D) Salt and water
- 23. Which of the following is considered a strong alkali?
A) Ammonium hydroxide
B) Aluminium hydroxide
C) Sodium hydroxide
D) Water
- 24. Which of the following has ionic bonding?
A) H2O
B) CH4
C) NaCl
D) CO2
- 25. Which Group 7 element is the most reactive?
A) Chlorine
B) Fluorine
C) Iodine
D) Bromine
- 26. The reaction between Zn and dilute HCl produces____
A) Salt and hydrogen gas
B) Salt and oxygen
C) Salt and water
D) Hydrogen and oxygen
- 27. What is the concentration of a solution containing 0.5 moles of NaOH dissolved in 250cm3 of water?
A) 2mol/dm3
B) 0.5mol/dm3
C) 0.25 mol/dm3
D) 1mol/dm3
- 28. What salt is formed when magnesium hydroxide reacts with hydrochloric acid?
A) MgCl2
B) CaCl2
C) NaCl
D) MgSO4
- 29. When calcium carbonate reacts with hydrochloric acid, which gas is evolved?
A) O2
B) N2
C) CO2
D) H2
- 30. Which compund has giant covalent structure?
A) Diamond
B) H2O
C) CO2
D) NaCl
- 31. What is the formula of aluminium sulfate?
A) AlSO4
B) Al2(SO4)_3
C) AL2SO4
D) Al(SO4)
- 32. Which element is least reactive?
A) Sodium
B) Neon
C) Potassium
D) Calcium
- 33. Qualitative analysis identifies____
A) the quantity of a substance
B) the mass of substance in a reaction
C) the type of substance present
D) the volume of each liquid
- 34. Quantitative analysis measures____
A) smell
B) colour
C) taste
D) amount
- 35. 1 mole of a gas occupies 22.4dm3. What is the volume of 0.5 moles at STP?
A) 33.6dm3
B) 11.2dm3
C) 22.4dm3
D) 44.8dm3
- 36. A sample contains 24g of a substance. If its molar mass is 12g/mol, calculate the number of moles.
A) 4 moles
B) 2 moles
C) 3 moles
D) 1 mole
- 37. 40g of a substance has a molar mass of 20g/mol. How many moles are present?
A) 6
B) 10
C) 4
D) 2
- 38. 0.5 moles of a substance has a molar mass of 20g/mol. Calculte the mass of the substance.
A) 20g
B) 10g
C) 15g
D) 5g
- 39. A solution contains 10g of solute in 500cm3 of water. Calculate the concentration in g/dm3.
A) 20g/dm3
B) 50g/dm3
C) 25g/dm3
D) 10g/dm3
- 40. 1dm3 of a solution contains 58g of NaCl. Calculate concentrstion in mol/dm3. (Na=23, Cl=35.5)
A) 2
B) 1
C) 0.5
D) 1.5
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