Which of the following does not affect the rate of a chemical reaction?

• A. Concentration of the reactants
• B. Addition or presence of catalyst
• C.the enthalpy change of the reaction
• D. Size of the reacting particle

Which of the following reaction will not take place under normal conditions?

• A. Zn(s) + 2HCI2(aq) + H 2(g)
• B. Fe (s) + H 2SO4(aq) → FeSO4(aq) + H2(g)
• C. Cu (s) + 2HCI (aq) → CuCI 2(aq) + H2(g)
• D. Ca(s) + 2H Ca(OH)2(g)

Which of the following salts when dissolved in water will form a solution that will change blue litmus to red?

• A. CH₃COONa
• B. NH₄Cl
• C. NaCl
• D. KCl

What is the mass number of an element if its atom contains 10 protons, 10 electrons and 12 neutrons?

• A. 32
• B. 22
• C. 20
• D. 10

Determine the mass of copper deposited by 4.0 moles of electrons in the reaction represented by the equation below: Cu₂(aq) + 2e^- → Cu(s)

• A. 32
• B. 64
• C. 128
• D. 256

0.05 mol dm^-3 HCl is neutralized by 25 cm³ NaOH. If the volume of acid used is 32.00cm³, what is the concentration of the base

• A) 0.016 mol dm^-3
• B) 0.032 mol dm^-3
• C) 0.039 mol dm^-3
• D) 0.064 mol dm^-3

When chlorine Is passed into water and the resulting solution exposed to sunlight, the product formed are

• A. Chlorine gas and hydrogen
• B. Oxygen and oxochlorate (I) acid
• C. Chlorine gas and oxochlorate (I) acid
• D. Hydrochloric acid and oxygen

The petroleum fraction that is used in heating furnaces in industries is

• A) diesel oil
• B) gasoline
• C) kerosene
• D) lubricating oi

(a) A compound X reacts with excess HNO\(_{3(aq)}\) to give carbon (IV) oxide and another compound Y. A solution of Y reacts with NaOH\(_{(aq)}\) to form a white precipitate which is insoluble in excess NaOH\(_{(aq)}\). Identify X and Y.

(b) (i) Write a balanced equation to illustrate the reducing property of ammonia in its reaction with CuO.

(ii) Explain why it is not advisable to heat ammonium dioxonitrate (III) directly.

(iii) Give two uses nitrogen.

(c) Give the reason why (i) dilute H\(_{2}\)SO\(_{4}\) is not suitable for the preparation of CO\(_{2(g)}\) from CaCO\(_{3(s)}\) (ii) concentrated H\(_{2}\)SO\(_{4}\) cannot be used to dry ammonia gas.

(d) State two: (i) physical properties; (ii) chemical properties of metals.

(e) What is the oxidation number of: (i) chlorine in I. Cl\(_{2}\). II. ClO\(_{-(3)}\)

(ii) vanadium in V\(_{2}\)O\(_{5}\)

(f)(i) Explain the term half-life. (ii) Two radioactive elements, P and Q have half-life of 1200 seconds and 3600 seconds respectively.

I. Which of the elements is more stable? II. Give a reason for your answer.

i) What is the name of the process used for the industrial preparation of tetraoxosulphate (VI) acid?

(ii) State the catalyst used in (a)(i)

(iii) Show by means of bdanced chemical equations only, the industrial preparation of tetraoxosulphate (VI) acid from sulphur (IV) oxide.

(b)(i) Distinguish between dehydration and drying

(ii) Explain why concentrated tetraoxosulphate (VI) acid cannot be used to dry ammonia

(iii) What is the drying agent for ammonia?

(c)(i) Give one example of I. a chloride which is soluble in hot water, II. a trioxocarbonate (IV) which does not decompose on heating, Ill. an amphoteric oxide

(ii) List three methods for the preparation of salts

(iii) State one method for the recovery of salt from its solution.

(d)(i) State Gay Lussac's law of combining volumes

(ii) Consider the reaction represented by the following equation: C\(_2\)H\(_{4(g)}\) + 3O\(_{2(g)}\) \(\to\) 2H\(_2\)O\(_{(g)}\) + 2CO\(_{2(g)}\). What is the volume of oxygen required for the complete combustion of 12.5 cm\(^{3}\) of ethene?