Consider the following diagram and use it to answer the question below
Which of the following half reaction equations represent the reaction at the cathode
- A. A\(^{3+_{(aq)}}\)+3e\(^{-}\) \(\rightarrow\) A\(_{(s)}\)
- B. B\(^{2+_{(aq)}}\)+2e\(^{-}\) \(\rightarrow\) B\(_{(s)}\)
- C. A\(_{(s)}\) \(\rightarrow\) \(^{3+_{(aq)}}\)+3e\(^{-}\)
- D. B\(_{(s)}\) \(\rightarrow\) B\(^{2+_{(aq)}}\) + 2e\(^{-}\)
Consider the following diagram and use it to answer the question below
Which of the following cell notations represent the diagram
- A. B\(^{2}\)+/B/ /A/A\(^{3+}\)
- B. A\(^{3+}\) /A/ /B/B\(^{2+}\)
- C. B/B\(^{2+}\)/ /A/\(^{3+}\)
- D. A/A\(^{3+}\)/ /B\(^{2+}\)/B
Which of the following statements about Group VII elements is correct?
- A. they are present in the same physical state
- B. they are strong reducing agents
- C. their reactivity decreases down the group
- D. they exist as monoatomic molecules
Elements with high ionization energies would——-
- A. lose electrons easily
- B. have large atomic radii
- C. have high effective nuclear charges
- D. have low atomic numbers
The collision between ideal gas molecules are considered to be perfectly elastic because
- A. they collide without losing energy
- B. they move randomly in a straight line
- C. their average kinetic energy is variable
- D. the distance between them is large compared to their size
Under which conditions of pressure (p) and temperature (T) would the volume of an inflated ballon increase? When
- A. P and T are increased
- B. both T and P are decreased
- C. T is increased and P is decreased
- D. T is decreased and P is increased
Consider the structure above
How many carbon atoms does the parent chain contain?
- A. 5
- B. 4
- C. 3
- D. 2
When CuSO\(_{4(aq)}\) is added to Pb(NO\(_{3}\))\(_{2(aq)}\)——–
- A. there would be no visible change
- B. a blue precipitate would be formed
- C. the resulting solution would become colourless
- D. a white precipitate would be formed
What would be observed when aqueous ammonia is added in drops and then in excess to a solution of copper(II) ions?
- A. blue precipitate is formed which is soluble in excess ammonia
- B. brick red precipitate is produced which is insoluble in excess ammonia
- C. white precipitate is formed which is excess in ammonia
- D. green precipitate is formed which is insoluble in excess ammonia
The basic property of salts used as drying agents is by?
- A. efforescence
- B. high melting point
- C. hygroscopy
- D. low solubility
What number of moles of oxygen would exert a pressure of 10 atm at 320 K in an 8.2 dm\(^{2}\) cylinder?
[R = 0.082 atm dm\(^{3}\) mol\(^{-1}\) K\(^{-1}\)]
- A. 0.32
- B. 1.56
- C. 3.13
- D. 31.25
The most common method of preparing insoluble salts is by
- A. filtration
- B. decomposition
- C. neutralization
- D. double decomposition
A molecular of phosphorus is
- A. diatomic
- B. triatomic
- C. tetraatomic
- D. monoatomic
Which of the following gasses is highly soluble in water at room temperature
- A. ammonia
- B. carbon (IV) oxide
- C. chlorine
- D. nitrogen
The formation of ethene from dehydration of ethanol can be described as——-
- A. an addition reaction
- B. an elimination reaction
- C. an oxidation reaction
- D. a substitution reaction
Study the graphs below and use them to answer the question below
Which of the graphs illustrates the variation of the solubility of a salt in water (y-axis), with an increase in temperature (x-axis) if the dissolution process is exothermic?
- A. I
- B. II
- C. III
- D. IV
Study the graphs below and use them to answer the question below
Which of the graphs illustrates the variation of the pH of a given volume of strong acid solution (y-axis) with the volume of strong base titrated against its (x-axis)?
- A. I
- B. II
- C. III
- D. IV
Study the graphs below and use them to answer the question below
Which of the following illustrates the variation of the rate of evolution of gas from a given length of magnesium ribbon (y-axis) with an increase in the concentration of the added (x-axis)?
- A. I
- B. II
- C. III
- D. IV
Which of the following pairs of compounds would form a precipitate when their aqueous solutions are mixed?
- A. NaCl and KNO\(_{3}\)
- B. KCL and NaNO\(_{3}\)
- C. K\(_{2}\)SO\(_{4}\) and BaCl\(_{2}\)
- D. NH\(_{4}\)NO\(_{3}\) and CO\(_{3}\)
The alkanol represented by the structure above is
- A. primary and dihydric
- B. secondary and monohydric
- C. tertiary and dihydric
- D. secondary and dihydric
If humid air is polluted by chlorine discharged, the air can be restored by sprinkling
- A. solid MnO\(_{2}\)
- B. acidified KMnO\(_{4}\)
- C. acidified FeSO\(_{4}\)
- D. saturated NaCl(aq)