Which of the following is acceptable as the organic product of the reaction of ethanoic acid and ethanol with an acid catalyst?
- A. Ethyl ethanoate
- B. Methyl ethanoate
- C. Ethyl methyl ketone
- D. Butanol
- E. None
20 cm3 of 1 M H\(_2\)SO\(_4\) is mixed 20 cm\(^3\) of 1 M NaOH. The resulting solution is?
- A. acidic with a molarity of 0.50 M H2SO4
- B. acidic with a molarity of 0.25 H2SO4
- C. neutral
- D. alkaline with a molarity of 0.25 M NaOH
- E. alkaline with a molarity of 0.50 M NaOH
When ethene gas reacts with chlorine gas to form 1, 2-dichloroethene, the reaction is called?
- A. substitution
- B. addition
- C. polymerization
- D. hydrolysis
- E. reduction
Which ONE of the following statements is true?
- A. All alkali metals salts dissolves with dissociation in water
- B. Most ionic substances are easily vaporized
- C. Ionic substances exist only as liquid
- D. Non-ionic substances are good electrolytes
- E. Nitrogen exists in a trivalent state in ammonium salts
Element X has a total of 19 electrons and can react with oxygen to form an oxide. Which of the following statements is NOT true of the oxide of the element?
- A. When exposed to air, it slowy changes to liquid
- B. its solution in water conducts electricity
- C. Its solution in water, on evaporationm gives a white solid
- D. Its solution in water liberates hydroge when in contact with aluminium metal
- E. Its oxide, when stronlgy heated, regenerates the elements X
Chlorine, bromine and iodine resemble each other in that all?
- A. dissolve in alkalis
- B. react violently with hydrogen without heating
- C. displace each other from solutions of their salts
- D. are gases
- E. are liquids
The boiling point of water is higher than that of methanol because?
- A. water is oxide while methanol is an alcohol
- B. inter molecular forces in water are stronger than those in methanol
- C. water is an inorganic compound while methanol is organic
- D. water is an ionic compound while methanol is a covalent compound
- E. water is more reactive than methanol
What mass of a divalent metal M (atomic mass = 40) would react with excess hydrochloric acid to liberate 224cm^3 dry hydrogen gas measured at S.T.P?
- A. 8.0 g
- B. 4.0 g
- C. 0.8 g
- D. 0.4 g
The movement of liquid molecules from the surface of the liquid to the gaseous phase above it is known as?
- A. Brownian movement
- B. condensation
- C. evaporation
- D. liquefaction
An eruption pollution an environment with gas suspected to be H2S, a poisonous gas. A residue team should spray the environment with?
- A. water
- B. moist SO2
- C. acidified KMnO4 and water
- D. water, acidified KMnO4 and oxygen
The molar ratio of oxygen to nitrogen in dissolved air is 2:1 whereas the ratio is 4:1 in atmospheric air because?
- A. nitrogen is less soluble than oxygen
- B. oxygen is heavier than nitrogen
- C. nitrogen has a higher partial pressure in air
- D. gases are hydrated in water
The energy changes accompanying the addition of an electron to a gaseous atom is called?
- A. first ionization energy
- B. second ionization energy
- C. electron affinity
- D. electronegativity
What are the possible oxidation numbers of an element if its atomic number is 17?
- A. -1 and 7
- B. -1 and 6
- C. -3 and 5
- D. -2 and 6
Which of the following physical properties decreases across the Periodic Table?
- A. Ionization potenial
- B. Electron affinity
- C. Electronegativity
- D. Atomic radius
A metallic ion X2+ with an inert gas structure contains 18 electrons. How many protons are there in this ion?
- A. 20
- B. 18
- C. 16
- D. 2
The forces holding naphthalene crystals together can be overcome when naphthalene is heated to a temperature of 354K resulting in the crystal to melting. These forces are known as?
- A. coulombic
- B. ionic
- C. covalent
- D. Van der waals
An increase in temperature causes an increase in the pressure of a gas because there is an increase in the?
- A. average velocity of the molecules
- B. number of collisions between the molecules
- C. density of the molecules
- D. free mean path between each molecules and other
One mole of propane is mixed with five moles of oxygen. The mixture is ignited and the propane burns completely. What is the volume of the products at s.t.p?
(G.M.V = 22.4 dm3 mol-1)
- A. 112.0 dm3
- B. 67.2 dm3
- C. 56.0 dm3
- D. 44.8 dm3
2.25g of a sample of an oxide of copper on reduction gave 2.0g of copper. 2.50g of another oxide of copper on reduction also gave 2.0g of copper. These results are in accordance with the law of?
- A. constant composition
- B. conservation of matter
- C. multiple proportions
- D. definite proportions
The formula of a compound formed in a reaction between a trivalent metal M and a tetravalent non-metal X is~?
- A. MX
- B. M3X4
- C. M4X3
- D. M3X2
What process would coal undergo to give coal gas, coal tar, ammoniacal liquor and coke?
- A. Steam distillation
- B. Destructive distillation
- C. Liquefaction
- D. Hydrolysis