Which of the following is not a direct petroleum product?
- A. Methane
- B. Ethanol
- C. Petrol
- D. Vaseline
- E. Kerosene
Which of the reactions represented by the following equations will take place at room temperature?
- A. C 6 H2O → CO + H2
- B. CuO + H2 → Cu + H2O
- C. N2 + 3H2 → 2NH3
- D. 2Na + 2H2O → 2NaOH + H2
- E. 2Fe + 3CI2 → 2FeCI3
When starch undergoes complete enzyme-catalyzed hydrolysis, the resulting product is
- A. glucose
- B. maltose
- C. sucrose
- D. fructose
- E. cellulose
In the redox reaction represented by the following equation: Cu2+aq + Zn(s) → Cu(s) + Zn2+
- A. the oxidation number of copper increases
- B. copper (ll) ions are reduced to copper atoms
- C. zinc atoms are reduced to zinc ions
- D. copper (ll) ions donate electrons to zinc atoms
The ratio of reactants to products is 1: 3: 2 in the reaction represented by the equation below: N2,/SUB> (g) → 2NH3(g) which of the following law is demonstrated by this?
- A. Boyle's law
- B. Law of multiple proportion
- C. Gay Lussac's law
- D. Law of constant composition
- E. Avogadro's law
Esterification of propane 1,2,3-triol and unsaturated higher carboxylic acids will produce
- A. fats
- B. soap
- C. methly-propanoate
- D. alkanols
- E. oils
2NaNO3 → 2NaNO2 + O2. From the equation above, what is the volume of oxygen produced at s.t.p. when 8.5g of 2NaNO3 is heated until no further gas is evolved? (2NaNO3 = 85, molar volume of gases at s.t.p. = 22.4dm3)
- A. 1.12dm3
- B. 2.24dm3
- C. 4.48dm3
- D. 11.2dm3
- E. 22.4dm3
Consider the reaction represented by the equation below: H2(g) + 12(s) ⇌ 2HI(g) ∆H negative. Which of the following takes place when the temperature of the reaction vessel is decreased?
- A. the gases condense
- B. the yield of hydrogen increases
- C. the concentration of the reactants remain constant
- D. more of the hydrogen iodide decomposes
- E. the yield of hydrogen iodide increases
CH4(g) + 2O2(g) → 2H2O(l) + CO2(g) ∆H = 890KJ mo-1 ∆H in the reaction represented by the equation above is the enthalpy of
- A. formation
- B. combustion
- C. solution
- D. activation
- E. neutralization
A compound which liberates carbon (IV) oxide from a hydrogentrioxocarbonate (lV) could have the molecular formula
- A. C2H5OH
- B. C 3H 4
- C. HCOOH
- D. H2O2
- E. C6H6
In which of the following are the substances arranged in their correct order of increasing melting point?
- A. Sodium chloride, sulphur, diamond
- B. Diamond, sodium chloride, sulphur
- C. Sulphur, sodium chloride, diamond
- D. Diamond, sulphur, sodium chloride
- E. Sulphur, diamond, sodium chloride
Which of the following statements is not correct? Group 7 elements
- A. are diatomic
- B. are good oxidizing agents
- C. are highly electronegative
- D. have relatively low ionization potentials
- E. have high electron affinity
Which of the following modes of motion is exhibited by the particles of a solid?
- A. Vibrational and random motion
- B. Vibrational and translational motion
- C. Translational and random motion
- D. Vibrational motion only
- E. Translational motion only
The products of the electrolysis of dilute sodium chlorid solution with platinum electrodes are
- A. hydrogen and oxygen
- B. oxygen and chlorine
- C. chlorine and water
- D. sodium amalgam and chlorine
- E. sodium hydroxide and water
Which of the following formula is that of a dicarboxylic acid?
- A. (CH3CH 2)2CHCOOH
- B. CH2(OH)2
- C. CH3CH(OH)COOH
- D. CH2(COOH)2
- E. CH3COCOOH
Brass is an alloy of copper and
- A. iron
- B. chromium
- C. zinc
- D. tin
- E. magnesium
CH2 = CH2 + H2SO4 → CH3 – CH2 -OSO3H. The reaction illustrated by the equation above is an example of
- A. substitution
- B. oxidation
- C. reduction
- D. addition
- E. displacement
Which of the following elements can from more than one acidic oxide?
- A. Hydrogen
- B. Sulphur
- C. Carbon
- D. Alumium
- E. Iron
Which of the processes represented by the following equations has the greatest positive entropy change?
- A. C6H3(l) → C6H 6 (g)
- B. H2O (s) → H2O(l)
- C. CuO(s) + H2(g) → Cu(s) + H2
- D. Na2CO3(s) + nH2O(l) →Na 2CO3nH2O(s)
- E. S(s) → S(l)
What is the amount (in mole) of sodium trioxocarbonate (IV) in 5.3 g of the compound? (Na2CO3 = 106)
- A. 0.05
- B. 0.10
- C. 0.20
- D. 0.50
- E. 2.00
When air is passed through a heated tube containing finely divided copper, the component that is absorbed in the process is
- A. carbon (IV) oxide
- B. nitrogen
- C. oxygen
- D. water vapour
- E. noble gases