What is the quantity of electricity produced when a current of 0.5A is passed for 5 hours 45 mins? (1F = 96500C)
- A. 0. 11F
- B. 0.12F
- C. 0.22F
- D. 1.1F
- E. 2.2F
The scum formed when soap is mixed with hard water could be
- A. calcium trioxocarbonate (IV)
- B. propane- 1, 2, 3 - triol
- C. calcium hydrogentrioxocarbonate (IV)
- D. magnesium tetraoxosulphate (IV)
- E. calcium stearate
The halide used widely in photography is
- A. ammonium chloride
- B. calcum chloride
- C. silver bromide
- D. sodium brmide
- E. aluminium fluroide
When air is passed through potash and then pyrogallol, the components are noble gases,
- A. oxygen and carbon (IV) oxide
- B. oxygen and nitrogen
- C. nitrogen and water vapour
- D. water vapour and carbon (IV) oxide
- E. oxygen and water vapour
The reactions ethyne are mainly
- A. substitution reactions
- B. addition reactions
- C. addition polymerization
- D. catalytic hydrogenation
- E. catalytic halogenation
The following acids are monobasic except
- A. methanoic acid
- B. dioxonitrate lll acid
- C. ethanedioic acid
- D. oxochlorate (l) acid
- E. hydrobromic acid
If the volume of a given mass of gas at 298 K and pressure of 205.2 x 10\(^3\) Nm\(^{-2}\) is 2.12dm\(^3\), what is volume of the gas at s.t.p? (Standard pressure = 101.3 x 10\(^3\) Nm\(^{-2}\), Standard temperature = 273K)
- A. 39.3dm 3
- B. 22.4dm3
- C. 4.93dm3
- D. 3.93dm3
- E. 0.393dm3
Which of the following processes is a physical reaction?
- A. Electrolysis
- B. Hydrolysis
- C. Allotropic change
- D. Neutralization
- E. Corrosion
Study carefully the reaction represented by the equation below. 2H2O 2(l) → O 2(g) + 2H2O(l). Which of the following will not reaction increase the reaction rate?
- A. Heating the hydrogen peroxide
- B. Adding a pinch of MnO2 to the reactant
- C. increasing the concentration of the H2O2
- D. Adding water to the reactant
- E. Exposing the reactant to sunlight
Methanol is obtained from wood by
- A. esterification
- B. bacterial decomposition
- C. combustion
- D. fractional distillation
- E. destructive distillation
The maximum number of electrons that can accommodated in the shell having the principal quantum number 3 is
- A. 3
- B. 9
- C. 10
- D. 18
- E. 32
When steam is passed over white-hot coke, the products are
- A. carbon (IV) oxide and nitrogen
- B. carbon (II) oxide and hydrogen
- C. carbon (ll) oxide and nitrogen
- D. carbon (lV) oxide and steam