Which of the following metals is the strongest reducing agent?
- A. Sodium
- B. Silver
- C. Potassium
- D. Copper
Consider the following reaction equation:
CuO(s) + H2(g) \(\to\) Cu(s) + H2O(1)
Which substance is oxidized?
- A. Cu
- B. CuO
- C. H2
- D. H2O
Which of the following statements about an electrochemical cell is correct? Oxidation occurs
- A. At the anode
- B. At the cathode
- C. Through the salt bridge
- D. In the aqueous solution
A change in the temperature of a saturated solution disturbs the equilibrium between the
- A. Undissolved solute and the solvent
- B. Dissolved solute and the solvent
- C. Dissolved solute and the undissolved solute
- D. Dissolved solute and the solution
A substance which dissolves readily in organic solvent would
- A. Be a covalent compound
- B. Have strong electrostatic forces of attraction
- C. have a high melting point
- D. Conduct electricity in molten state
Which of the following compounds is the least soluble in water?
- A. CaCl2
- B. CaSO4
- C. NaCl
- D. Na2SO4
Solubility is practically applied in
- A. Fractional distillation
- B. The determination of pH
- C. The determination of saturation in hydrocarbons
- D. Solvent extraction
Which of the following oxides can be reduced by hydrogen?
- A. Aluminium oxide
- B. Magnesium oxide
- C. Sodium oxide
- D. Silver oxide
An example of an acid salt is
- A. CH3COOONa
- B. Mg(OH)Cl
- C. NaHSO4
- D. (NH4)2SO4
The following diagram illustrates the rate curve that was obtained when Mg reacted with excess dilute HCl.
The diagram became horizontal at X because
- A. The reaction was slowed down
- B. All the dilute HCl has reacted
- C. All the Mg has reacted
- D. Hydrogen gas is produced at a steady rate
Which of the following statements about intermolecular distances and cohesive forces between gas is correct? They are
- A. Both large
- B. Both negligible
- C. Constant and negligible
- D. Large and negligible
When a reaction is endothermic,
- A. Enthalpy change, \(\Delta\)H is negative
- B. Heat content of a product is less than the heat content of a reactant
- C. Heat content of reactants is less than the heat content of product
- D. The reaction is non-spontaneous
Which of the following gases will diffuse most rapidly?
[H = 1.00, C = 12.0, O = 16.0, S = 32.0, Cl = 35.5]
- A. Cl2
- B. SO2
- C. CH4
- D. C2H6
The vapour pressure of a liquid depends on:
I. Temperature II. rate of condensation III. Cohesive forces holding the particles together.
- A. I
- B. I and II
- C. I and III
- D. II and III
The general gas equation was deprived from______?
- A. Boyle's and Gay Lussac's laws
- B. Boyle's and Graham's laws
- C. Boyle's and Charles' laws
- D. Dalton's atomic theory
Consider the following reaction equation:
SO42-(aq) + 2H+(aq) + ye– \(\to\) SO42-(aq) + H2O(1).
The value of y in the equation is
- A. 2
- B. 3
- C. 4
- D. 6
The number of oxygen molecules present in 16.0g of the gas is ______?
[Avogadro’s number = 6.02 x 1023]
- A. 6.02 x 1022
- B. 6.02 x 1023
- C. 3.01 x 1023
- D. 1.51 x 1023
Consider the following reaction equation:
C2H4(g) + 3O2(g) \(\to\) 2CO2(g) + 2H2O(g)
The volume of CO2(g) produced at s.t.p when 0.05 moles of C2H4(g) was burnt in O2(g) is
[Molar Volume of gas = 22.4dm3
- A. 1.12dm3
- B. 2.24dm3
- C. 3.72dm3
- D. 4.48dm3
Which of the following trioxonitrate(V) salts would decompose on heating to form a metal?
- A. Cu(NO3)2
- B. AgNO3
- C. Pb(NO3)2
- D. KNO3
Which of the following substances when boiled with aqueous solution of sodium hydroxide would be hydrolyzed?
i. Protein ii. Fat iii. Polythene
- A. i
- B. ii
- C. i and ii
- D. ii and iii
Which of the following oxides is ionic?
- A. P4O10
- B. MgO
- C. Al2O3
- D. SO2