Electrons enter into orbitals in order of increasing energy as exemplified by?
- A. 1S\(^2\)2S\(^2\)2PX\(^2\)2py\(^2\)2pz\(^0\)3s\(^0\)
- B. 1S\(^2\)2S\(^2\)2PX\(^2\)2py\(^1\)2pz\(^1\)3s\(^0\)
- C. 1S\(^2\)2S\(^2\)2PX\(^1\)2py\(^1\)2pz\(^1\)3s\(^1\)
- D. 1S\(^2\)2S\(^2\)2PX\(^2\)2py\(^2\)2pz\(^0\)3s\(^1\)
H\(^+\) + OH\(^-\) β H\(_2\)O
The equation above illustrates
- A. precipitation
- B. hydration
- C. hydrolysis
- D. neutralization
Which of the following best represent solid gas mixture?
- A. milk
- B. kerosene
- C. soil
- D. smoke
When heat is absorbed during a chemical reaction, the reaction is said to be
- A. thermodynamic
- B. exothermic
- C. isothermal
- D. endothermic
The dehydration of CH\(_3\)CH\(_2\)CH\(_2\)CH\(_2\)OH will give?
- A. HCβ‘CCH\(_2\)CH\(_3\)
- B. CH\(_2\)β‘CH\(_2\)CH\(_3\)
- C. CH\(_3\)Cβ‘CCH\(_3\)
- D. CH\(_3\)CH=CHCH\(_3\)
The pollutant usually presents in a city which generates its electricity from coal?
- A. fog
- B. carbon(ii)oxide
- C. smog
- D. sulphur(iv)oxide
The reactions below represent neutralization reaction, in which of them is the value of ΞH highest?
- A. CH\(_3\)CH\(_2\)COOH + KOH β CH\(_3\)CH\(_2\)COOK + H\(_2\)O
- B. NH\(_4\)OH + HCL β NH\(_4\) + H\(_2\)O
- C. NaOH + HCL β NaCL + H\(_2\)O
- D. CH\(_3\)COOH + NaOH β CH\(_3\)COONa + H\(_2\)O
If the volume of a given mass of a gas at 0ΒΊc is 29.5cm\(^3\). What will be the volume of the gas at 15ΒΊc, given that the pressure remains constant.
- A. 31.6
- B. 62.2
- C. 32.7
- D. 31.1
In which of the following will hydrogen form ionic compound?
- A. HCL
- B. NaH
- C. NH\(_3\)
- D. CH\(_4\)
2H\(_2\) + O\(_2\) β 2H\(_2\)O
From the equation above, calculate the volume of unreacted oxygen gas if a mixture of 50cm\(^3\) of hydroden and 75cm\(^3\) of oxygen are involved
- A. 85cm\(^3\)
- B. 50cm\(^3\)
- C. 125cm\(^3\)
- D. 55cm\(^3\)
An organic compound contains 69% carbon, 15.3% hydrogen and 30.7% oxygen. Calculate the the empirical formula [C=12, H = 1, O = 16]
- A. C\(_4\)H\(_12\)O
- B. C\(_3\)H\(_9\)O
- C. C\(_4\)H\(_9\)O
- D. C\(_3\)H\(_8\)O
Crude petroleum is converted to useful products by the process of?
- A. fractional crystallization
- B. fractional distillation
- C. filtration
- D. chromatography
An organic compound which decolorizes bromine water is likely to be?
- A. C\(_3\)H\(_8\)
- B. C\(_2\)H\(_6\)
- C. C\(_4\)H\(_10\)
- D. C\(_2\)H\(_4\)
In order to electroplate spoon with silver, the arrangement of the electrolytic cell is?
- A. the anode is a silver rod and the cathode is the spoon
- B. the anode is the spoon and the cathode is a silver rod
- C. the electrolyte is silver trioxonitrate(v)( solution and the cathode is a silver rod.
- D. the electrolyte is silver trioxonitrate(v) solution and the anode is the spoon
A colored gas that is known to be poisonous and can readily damage the mucous lining of the lungs is?
- A. hydrogen sulphide
- B. carbon(ii)oxide
- C. chlorine
- D. sulphur(iv)oxide
An organic functional group which can likely decolorize ammoniacal silver nitrate is?
- A. alkene
- B. alkane
- C. alkyne
- D. alkanol
Zn + 2HCL β ZnCl\(_2\) + H\(_2\)
What happens to zinc in the above reaction?
- A. oxidized
- B. a reactant
- C. reduced
- D. a metal
N\(_2\)O\(_4\) β 2NO\(_2\) (Ξ = -ve)
From the reaction above, which of these conditions would produce the highest equilibrium yield for N\(_2\)O\(_4\)?
- A. Low temperature and high pressure
- B. Low temperature and low pressure
- C. high temperature and low pressure
- D. high temperature and high pressure
An organic compound with fishy smell is likely to have a general formula?
- A. RCONHR\(^1\)
- B. RCONH\(_2\)
- C. RNH\(_2\)
- D. RCOR\(^1\)
Using the metal activity series, the metal that can liberate hydrogen gas from steam is?
- A. iron
- B. copper
- C. tin
- D. lead
Addition of charcoal to the filter bed of sand during water treatment for township supply is to?
- A. prevent goiter
- B. prevent tooth decay
- C. remove odour
- D. kill germs