101.The following substances are non-electrolytes except
- A. chloroform
- B. sugar cane
- C. acetic acid
- D. C and D
102.The hydrolysis of NH₄Cl salt will give
- A. acidic solution
- B. neutral solution
- C. basic solution
- D. hot solution
103.The pollutants that are likely to be present in an industrial environment are
- A. H₂S, SO₂ and oxides of nitrogen
- B. NH₃, HCl and CO
- C. CO₂, NH₃, and H₂S
- D. dust, NO and Cl₂
104.What is the basicity of tetraoxosulphate (VI) acid?
105.Which of the following gases is the most dangerous pollutant?
- A. Hydrogen sulphide
- B. Carbon (IV) oxide
- C. Sulphur (IV) oxide
- D. Carbon (II) oxide
106.Which of the following ions is a pollutant in drinking water even in trace amount?
- A. Ca²⁺
- B. Hg²⁺
- C. Mg²⁺
- D. Fe²⁺
107.Which of the following is an example of a double salt
- A. NH₄Cl
- B. alum
- C. NaCO₃
- D. AlCl₃
108.0.16g of methane when burnt increases the temperature of 100g of water by 40⁰C, what is the heat of combustion of methane if the heat capacity of water is 4.2 Jg⁻¹⁰C ⁻¹? (CH₄=16).
- A. 1,160kJmol⁻¹
- B. 1,180kJmol⁻¹
- C. 1,560kJmol⁻¹
- D. 1,680kJmol⁻¹
109.A charged car battery has ___ energy that can be converted into another energy called ___energy
- A. Chemical, electrical
- B. mechanical, chemical
- C. heat, mechanical
- D. light, electrical
110.Copper oxide is heated with charcoal to produce carbon monoxide and copper. The reaction is an example of
- A. both oxidation and reduction
- B. neither oxidation and reduction
- C. oxidation only
- D. reduction only
111.For each oxygen atom in hydrogen peroxide which acts as an oxidant, there is an oxygen atom which acts as a /an
- A. Oxidant
- B. reductant
- C. oxidizing agent
- D. catalyst
112.Given the change of phase: CO₂(g) changes to CO2(s), the entropy of the system
- A. decreases
- B. increases
- C. remains the same
- D. all of the above
113.In which of the following is the entropy change positive?
- A. Reaction between an acid and a base.
- B. Addition of concentrated acid to water
- C. Dissolution of sodium metal in water
- D. Thermal dissociation of ammonium chloride
114.One of these elements is the best reducing agent.
115.The name of the gas driven off at the negative electrode during the electrolysis of brine is ___
- A. hydrogen
- B. chlorine
- C. oxygen
- D. sodium
116.The oxidation state of P in H₂P₂0₇²⁻ is ___
117.The oxidation state of S in Ca(HS0₃)₂ is __
118.The oxidizing agent in the reaction, 3Br₂ + 6OH⁻ = BrO₃⁻ + 5Br⁻ + 3H₂O is __
- A. Br₂
- B. OH⁻
- C. BrO₃⁻
- D. e⁻
119.When heat is absorbed during a chemical reaction, the reaction is said to be ___
- A. thermodynamic
- B. exothermal
- C. isothermal
- D. endothermic
120.Given the reaction at equilibrium: 2CO(g) + O₂(g) ↔ 2CO₂(g) When the reaction is subjected to stress, a change will occur in the concentration of
- A. reactants, only
- B. roducts, only
- C. both reactants and products
- D. neither reactants nor products