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