Chemistry — 2010
WASSCE · 38 questions · Answers included
38 questions
Which of the following equations represents beta decay?
The energy change which accompanies the addition of an electron to a gaseous atom is
Which of the following elements is a d-block element?
Which of the following statements about chlorine and iodine at room temperature is correct?
If X is a group lll element, its oxide would be represented as
Which of the following species correctly represented an ion of M with 13 protons and 10 electrons?
A solid substance with high melting and boiling points is likely to be a/an
Which of the following molecules has a linear shape?
Which of the following molecules has a triple bond in its structure?
The bonds in crystaline ammonium chloride are?
Consider the neutralization reaction represented by the following equation: Na2CO3 + 2HNO 3 → 2NaNO3 + H2O + CO2 The stoichiometric ratio of acid to base is
A solution of sodium trioxocarbonate (IV) contains 10.6g in 250cm 3 of solution. Calculate the concentration of the solution. [Na 2 CO 3 = 106.0]
What is the volume occupied by 2 moles of ammonia at s.t.p?
Which of the following apparatus can be used to measure accurately a specific volume of a liquid?
A given volume of oxygen diffused through a porous partition in 8 seconds. How long would it take the same volume of carbon (IV) oxide to diffuse under the same condition? [C = 12.0, O = 16.0]
Which of the following gases contains the highest number of atoms at s.t.p?
The determination of heat of combustion is carried out with
The minimum amount of energy required for effective collisions between reacting particles is known as
Which of the following oxides is basic?
Which of the following equimolar solutions would have the highest conductivity?
The following substances are normal salts except
Which of the following chlorides is insoluble in water?
Which of the following factors would not affect the solubility of a gas?
Consider the equilibrium reaction represented by the following equation: 2SO 2(g) + O 2(g) ⇌ 2SO 3(g) ; ∆H = 395.7 kJmol -1 Which of the following statements about the equilibrium system is correct?
The rate of chemical reaction of solids are not affected by
Which of the following statements about the cell notation Mg/Mg\(^{2+}\)//Cu\(^{2+}\)/Cu is correct?
Which of the following statements about the electrolysis of CuSO4(aq) using copper cathode and platinum anode is not correct?
What is the change in oxidation number of manganes in the reaction represented by the following equation? MnO - 4(aq) + 8H + (aq) + 5e - → Mn 2+ (aq) + 4H 2 O (l)
The quantity of electricity required to discharge 1 mole of univalent ion is
Fact and oils are used as raw materials in the following industries except
An advantage of detergent over soap is that detergents
The products of fermentation of sugar are
The IUPAC name of C 2 H 6 COOC 2,/sub>H 6 is
An organic compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. What is the empirical formula of the compound? [O = 16.0, C = 12.0, H = 1.0]
Compound N reacts with sodium metal to produce a gas that gives a 'pop' sound with a burning splint N also react with ethanoic acid to give a sweet smelling liquid. Compound N is an
The main function of limestone in the blast furnance is to
Which of the following substances cannot be classified as a heavy chemical?
Which of the following metals exists as liquid at ordinary temperature?