161.What is the process associated with conversion of vegetable oil to soap?
- A. Esterification
- B. Saponification
- C. hydrolysis
- D. Acidification
162.When ethanal vapour is passed over manganese (II) ethanoate (manganese acetate) catalyst in the presence of air, the product is:
- A. ethanoate
- B. ethanol
- C. methanol
- D. ethanoic acid
163.When KOH is used instead of NaOH in the production of soap, it has the following advantages except it gives:
- A. softer soap
- B. harder soap
- C. soap with lower melting point
- D. more soluble soap
164.When palm wine is left exposed to air for a few days, it goes sour. The bacteria in the air oxidises.________ in palm wine to _________
- A. ethanol, ethanoic acid
- B. ethanoic acid, ethanol
- C. ester, ethanoic acid
- D. ether, ethanol
165.Which of the following is not true about benzoic acid?
- A. It is aromatic in nature
- B. It can be manufactured from methylbenzene
- C. It has molecular formula C₆H₆COOH
- D. It sublimes readily
166.Which of the following reactions is correct?
- A. C₆H₅COOH + CaO → C₆H₅Ca + HCO₃
- B. C₆H₅COOH + CaO → C₆H₆ + CaCO₃
- C. C₆H₅COOH + PCl₅ → C₆H₅Cl + H₂PO4
- D. C₆H₅COOH + C₂H₅OH → C₆H₆ + C₃H₈COOH
167.Which of these is not a property of ethanedioic acid?
- A. It is a stronger acid than ethanoic acid but weaker than inorganic acids
- B. It is a reducing agent
- C. It is an oxidising agent
- D. It is soluble in cold water
168.Organic Chemistry is the branch of Chemistry that deals with _____ and ____
- A. Hydrogen & oxygen
- B. Carbon & Carbon
- C. Carbon & Sulphur
- D. Carbon & Hydrogen
169.The movement of liquid molecules from the surface of the liquid to the gaseous phase above it is known as
- A. Brownian motion
- B. ZigZag Motion
- C. Evaporation
- D. Liquefaction
170.Which of the following is an acidic salt?
- A. NaHSO₄
- B. Na₂SO₄
- C. CH₃CO₁Na
- D. Na₂S
171.Given that the molecular mass of iron is 56 and that of oxygen is 16, how many moles of iron(III)oxide will be contained in 1kg of the compound?
- A. 12.5moles
- B. 0.625moles
- C. 25moles
- D. 6.25moles
172.3.0g of a mixture of potassium carbonate and potassium chloride were dissolved in a 250cm³ standard flask. 25cm³ of this solution require 40.00cm³ of 0.01m HCl for neutralization. What is the percentage by weight of K₂CO₃ in the mixture? (K=39,O=16,C=12)
- A. 9.2%
- B. 8.9%
- C. 7.2%
- D. 82%
173.0.499 of CuSO₄.XH₂O when heated to constant weight gave a residue of 0.346g. What is the value of X?
174.The principal constituent of natural gas is
- A. Methane
- B. Ethane
- C. Propane
- D. Butane
175.Which of the following gases can be collected by the method of downward delivery?
- A. Chlorine
- B. Oxygen
- C. Ammonia
- D. Hydrogen
176.A mixture of sugar and sulphur can be separated by
- A. Dissolution in water, evaporation and filtration
- B. Filtration, evaporation and dissolution in water
- C. Dissolution in water, filtration and evaporation
- D. Evaporation, dissolution in water and filtration
177.The percentage of water of crystallization in ZnSO₄ 7H₂O is
178.When a solution of silver(I) nitrate is saturated with hydrogen sulphide, a black precipitate forms which is
- A. H₂S
- B. Ag₂S
- C. PbS
- D. HNO₃
179.In which of the following reactions does reduction takes place
- A. Fe²⁺-e⁻ ---- Fe³⁺
- B. 2O²⁻ ----O₂ +4e⁻
- C. Cr---2e⁻ + Cr²⁺
- D. 2H⁺ +2e⁻ --- H2
180.The weakest attractive force that can be observed between two molecules is
- A. Ionic
- B. Covalent
- C. Coordinates
- D. Van der waals forces