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