The product of the reaction between propanoic acid and ethanol is
- A. prophlmethanoate
- B. ethylethanoate
- C. methylpropanoate
- D. propylethanoate
- E. ethylpropanoate
Which of the following minerals contains flurine as one of its constituent elements?
- A. Cryolite
- B. Bauxite
- C. Potash alum
- D. Kaolin
- E. Mica
Which of the following pH values is likely to be that of a slightly alkaline solution?
- A. 2
- B. 5
- C. 7
- D. 8
- E. 13
Which of the following statements is not correct? The 4s orbital
- A. is defined by the quantum number 1 = O
- B. is of higher energy than the 3d orbital
- C. contains a maximum of two electrons
- D. is spherical about the nucleus
- E. is filled before the 4p orbital
Which of the following statement is not correct about esterification?
- A. It is a slow reaction
- B. the process is reversible
- C. it is similar to hydrolysis
- D. it is catalysed by acids
- E. the products usually have a fruity smell
If a reaction is said to be exothermic, which of the following statements is a correct deduction from the information?
- A. the reaction vessel gets hotter as the reaction proceeds
- B. ∆H for the reaction is positive
- C. the rate of the reaction increases with time
- D. the activation energy of the reaction is high
- E. the rate of the reaction increases with time
If a reaction is said to be exothermic, which of the following statements is a correct deduction from the information?
- A. the reaction vessel gets hotter as the reaction proceeds
- B. ∆H for the reaction is positive
- C. the rate of the reaction increases with time
- D. the activation energy of the reaction is high
- E. the rate of the reaction increases with time
Vulcanization of rubber
- A. stops the growth of fungus on the rubber
- B. increases the solubility of the rubber
- C. decreases the elasticity of the rubber
- D. hardnes the rubber through cross-linkage
- E. removes sulphur from the rubber
The energy required to remove the most loosely bound electron from an atom in the gaseous state is known as the
- A. bond energy
- B. ionization energy
- C. potential energy
- D. activation energy
- E. kinetic energy
Which of the following compounds is not correct about the reaction of sodium material for the manufacture of plastics?
- A. Ethyne
- B. Ethane
- C. Monochloroethene
- D. Propene
- E. Butadiene
What is the number of oxygen atoms in 32g of the gas? (O = 16, L = 6.0 X 10\(^{23}\) mol\(^{-1}\))
- A. 3.2 X 10 23
- B. 6.0 X 1023
- C. 1.2 X 1024
- D. 1.6 X 1024
- E. 2.0 X 1024
The formula (CH3),3 COH is that of a
- A. polyhdric alkanol
- B. secondary alkanol
- C. tertiary alkanol
- D. primary alkanol
- E. trihydric alkanol
Which of the following gases will have the highest rate of diffusion under the same conditions? (H = 1, C =12, O = 16, S = 32, CI = 35.5)
- A. O2
- B. CI2
- C. HCI
- D. H2S
- E. CO2
When sucrose is warmed with Fehling’s solution
- A. a silver mirror is produced
- B. the solution turns milky
- C. a brick-red precipitate is formed
- D. there is no precipitate
- E. a blue coloration is produced
The following salts are readily soluble in water except
- A. Na2CO3
- B. Pb(NO3)2
- C. KCI
- D. CuCO3
- E. PbSO4
Which of the following involves the decomposition enzymic action?
- A. Esterification
- B. Fermentation
- C. Dehydration
- D. Polymerization
- E. Saponification
Consider the compounds represented by the following general formula: X2SO4 Y2(SO4)3, 24H2OX and Y could respectively be
- A. K and AI
- B. Fe and K
- C. AI and Fe
- D. AI and K
- E. Cr and K
When iron rusts, it undergoes
- A. deliquescence
- B. chemical decomposition
- C. hydrolysis
- D. redox reaction
- E. combustion
What is the change in the oxidation number of phosphorus in the the reaction represented by the following equation? 4P (s) + 5O(2)(g) → 2P2O5(g)
- A. 0 to + 2
- B. 0 to 5
- C. +4 to + 2
- D. +4 to +5
- E. +4 to +7
What is the following compounds will not decompose when heated strongly ?
- A. NaHCO3
- B. K2CO3
- C. MgCO3
- D. Ca(HCO3)2
- E. ZnCO3
”The rate a reaction is proportional to the number of effective collisions occurring per second between the reactants”. This statement is associated with the
- A. Kinetic theory
- B. rate law
- C. atomic theory
- D. collision theory
- E. gas laws