Alkanes are used mainly
- A. in the production of plastics
- B. as domestic and industrial fuels
- C. in the textile industry
- D. in the hydrogenation of oils
- E. as fine chemicals
Trioxosulphate (lV) acid is not stored for a long period because it
- A. is a weak dibasic acid
- B. has bleaching properties
- C. is unstable and eaily decomposed
- D. smells strongly of sulphur (lV) oxide
- E. can act as a germicide
Which of the following solids has a network structure?
- A. Diamond
- B. lodine
- C. Sulphur
- D. Graphite
- E. lron
Starch undergoes complete hydrolysis to produce
- A. maltose
- B. lactose
- C. fructose
- D. glucose
- E. sucrose
Which of the following separation is routinely applied in the petroleum industry
- A. Filtration
- B. Chromatography
- C. Evaporation
- D. Fractional crystallization
- E. Fractional distillation
Which of the following accounts for the difference in the mode of conduction of electricity by metals and aqueous salt solutions?
- A. Electrons are present in metals but not in salt solutions
- B. Metals are conductors while salts are electrolytes
- C. Electricity is carried by mobile elrctrons in metals but by ions is aqueous salt solution
- D. salts ionize in aqueous solutions while metals do not
- E. Metals are reducing agents while salts are not
A dye is suspected to have contaminated a lollipop. Which of the following is the best method by which the contaminant may be isolated?
- A. Fractional distillational
- B. Recrystallization
- C. Filtration
- D. Paper chromatography
- E. Evaporation
What is the value of n in the following equation? XO-4 +8H + + ne- → X2 + + 4H2O
- A. 2
- B. 3
- C. 4
- D. 5
- E. 6
Which of the following groups contains entirely linear molecules?
- A. H 2NH3O 2
- B. CO2NH 3 2
- C. H 2CH4N2
- D. CO2H2N2
- E. CH 4O 2CO 2
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