The type of reaction that is peculiar to benzene is?
- A. addition
- B. hydrolysis
- C. polymerization
- D. substitution
The formula for ethyl butanoate is
- A. C3H7COOC2H5
- B. C2H5COOC3H7
- C. C4H9COOC2H5
- D. C2H5COOC4H9
The leachate of a certain plant ash is used in local soap making because it contains
- A. sodium chloride and potassium hydroxide
- B. sodium hydroxide
- C. potassium hydroxide
- D. soluble carbonates and hydrogen carbonates
Ethene reacts with hydrogen bromide to give
- A. CH2Br2
- B. CH3CH2Br
- C. C2H2Br2
- D. CHBr2
The modern process of manufacturing steel for iron is by
- A. treatment with acids
- B. oxidation
- C. blast reduction
- D. treatment with alkanal
Chlorine gas turns a damp starch-iodide paper
- A. pink
- B. colourless
- C. red
- D. dark blue
The metal that liberates hydrogen from cold water in bubbles only is?
- A. Na
- B. K
- C. Ca
- D. Al
The salt that will form a precipitate soluble in excess ammonia solution is
- A. Ca(NO3)2
- B. Cu(NO3)2
- C. Mg(NO3)2
- D. Al(NO3)3
Which of the following statements is true of sulphur (IV) oxide?
- A. It forms tetraoxosulphate (VI) acid with water
- B. It is an odourless gas
- C. It is an acid hydride
- D. It forms white precipitate with acidified barium chloride
Hydrogen can be displaced from a hot alkaline solution by?
- A. Fe
- B. Cu
- C. Ca
- D. Sn
Metals of the first transition series have special properties which are different from those of groups I and II elements because they have partially filled
- A. s orbitals
- B. p orbitals
- C. d orbitals
- D. f orbitals
Chlorine gas is prepared in the laboratory by
- A. adding concentrated hydrochloric acid to solid manganese (IV) oxide
- B. aciding concentrated tetraoxosulphate (VI) acid to solid sodium chloride
- C. dropping concentrated hydrochloric acid onto potassium tetraoxomanganate (VI) crystals
- D. aciding concentrated tetraoxosulphate (VI) acid to hydrochloric acid
Which of the following is an electrolyte?
- A. Alcohol
- B. Sodium acetate solution
- C. Solid potassium hydroxide
- D. Mercury
When sugar is dissolved in tea, the reaction is always accomplished by
- A. positive change in entropy
- B. negative entropy change
- C. no entropy change
- D. a minimum entropy change
CO(g) + H2O(g) → CO2(g) + H2(g)
From the reaction above, calculate the standard enthalpies of formation if CO2(g), H2O(g) and CO(g) in kJ mol-1 are -394, -242, and -110 respectively.
- A. -262 kJ mol-1
- B. -42 kJ mol-1
- C. +42 kJ mol-1
- D. +262 kJ mol-1
In the electrolysis of a concentrated solution of sodium chloride using electrodes, which of the following ions are discharged at the cathode and anode respectively?
- A. Na+ and Cl-
- B. Na+ and OH-
- C. H+ and OH-
- D. H+ and Cl-
When at equilibrium, which of the reactions below will shift to the right if the pressure is increased and the temperature is kept constant?
- A. 2SO3(g) ↔ 2SO2(g) + O2(g)
- B. 2CO2(g) ↔ 2CO(g) + O2(g)
- C. 2H2(g) + O2(g) ↔ 2H2O(g)
- D. 2NO(g) ↔ N2(g) + O2(g)
If y is an oxidizing agent that reacts with a reducing agent, Z, which of the following is correct?
- A. Y increases in oxidation number
- B. Y becomes reduced
- C. Z loses protons
- D. Z gains protons
Which of the following will change when a catalyst is added to a chemical reaction?
- A. The activation energy
- B. The potential energy of the reactants
- C. The heat of the reaction
- D. the potential energy of the product
The commonest feature of reactions at the anode is that
- A. electrons are consumed
- B. oxidation is involved
- C. ions are reduced
- D. electrode dissolves