In contact process, the catalyst used in the conversion of sulphur(IV)oxide to sulphur(VI) oxide is
- A. nickel
- B. platinum
- C. vanadium(V)oxide
- D. magnesium(IV)oxide
A factor that does not affect the rate of a chemical reaction is
- A. surface area
- B. temperature
- C. volume
- D. catalyst
Concentrated sodium chloride solution is electrolyzed using mercury cathode and graphite anode. The products at the anode and the cathode respectively are
- A. hydrogen and chlorine
- B. chlorine and hydrogen
- C. chlorine and sodium
- D. sodium and chlorine
What is formed when metal reacts with acid to liberate gas?
- A. Salt
- B. Base
- C. Acid
- D. Liquid
The IUPAC nomenclature of the compound above is
- A. propan-1-ol
- B. butan-1-ol
- C. 2-methyl propan-1-ol
- D. 2-methyl propan-2-ol
Aqueous solution of sodium hydroxide can be used to test for the presence of : I. Ca\(^{2+}\) , II. Zn\(^{2+}\) , III. Cu\(^{2+}\)
- A. I only
- B. I and III
- C. I, II and III
- D. I and II only
The composition of alloy permalloy is iron and
- A. copper
- B. nickel
- C. lead
- D. magnesium
CH\(_3\)-CH\(_2\)-OH and CH\(_3\)-O-CH\(_3\)
The relationship between the two compounds above, is that they are
- A. allotropes
- B. isotopes
- C. isomers
- D. isobars
Alkanoates are naturally found in
- A. lipids
- B. vitamins
- C. proteins
- D. rubbers
Determine the half-life of a first order reaction with constant 4.5 x 10\(^{-3}\) sec\(^{-1}\).
- A. 154 s
- B. 15.4 s
- C. 1540 s
- D. 1.54 s
Fats and oils are esters of fatty organic acids combined with a trihydric alkanol commonly referred to as
- A. ethanol
- B. methanol
- C. glycol
- D. glycerol
| COMPOUND | S | T | U | V | W |
| FORMULA | ROR’ | RCOOH’ | RCOR’ | ROH’ | RCOOR’ |
From the table above, which of these two compounds can form functional group isomers?
- A. S and T
- B. T and U
- C. S and V
- D. T and V
The difference in molecular mass between an alkene and alkyne with six carbon per mole is
- A. 10
- B. 12
- C. 2
- D. 14
The molecular formular of a hydrocarbon with an empirical formula of CH\(_3\) and a molar mass of 30 is
- A. C\(_2\)H\(_4\)
- B. C\(_3\)H\(_3\)
- C. C\(_2\)H\(_6\)
- D. C\(_6\)H\(_6\)
Sulphur(IV)oxide can be used as a
- A. coating agent
- B. dehydrating agent
- C. refrigerant
- D. drying agent
Water gas obtained from the gasification of coke is made up of
- A. Nitrogen and Carbon(II) oxide
- B. Nitrogen and Hydrogen
- C. Hydrogen and Carbon(II) oxide
- D. Carbon(II)oxide and Carbon(IV)oxide
When Sulphur(IV)oxide is passed into solution of acidified tetraoxomanganate(VII), the colour changes from
- A. blue to green
- B. pink to yellow
- C. purple to colourless
- D. Orange to green
The highest isotope of hydrogen is
- A. Deuterium
- B. protium
- C. tritium
- D. positron
Na\(_2\)X ⇌ 2Na\(^+\) + X\(^{2-}\)
The bond between Na and X is likely to be
- A. covalent
- B. dative
- C. ionic
- D. metallic
The group VIII elements are the inert gases because they
- A. have lone pair of electrons on their valence shells
- B. all have completely filled valence shells
- C. are all solids
- D. are all polyatomic molecules
How much of 5g of radioactive element whose half life is 50days remains after 200days?
- A. 2.50 g
- B. 1.25 g
- C. 0.63 g
- D. 0.31 g