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