A thousand ways to pass basic chemistry examination

201.Esterification of propane1,2,3 – triol and unsaturated higher carboxylic acids will produce
  • A. Fats
  • B. Soap
  • C. Alkanols
  • D. Methyl propanoate
202.The green house effect is a climatic condition associated with the presence of excess
  • A. CO₂
  • B. H₂S
  • C. NO
  • D. NH₃
203.The metal extracted from cassiterite is
  • A. Calcium
  • B. Copper
  • C. Tin
  • D. Sodium
204.Four elements W, X, Y, and Z have atomic numbers 2, 6, 16 and 20 respectively. Which of these elements is a metal?
  • A. X
  • B. W
  • C. Z
  • D. Y
205.Equilibrium is said to be attained in a reversible reaction when
  • A. All the reactants have been used up
  • B. All the products have been formed
  • C. There is no further change in temperature
  • D. The rate of forward and backward reactions are equal
206.Deliquescent substances are used for
  • A. cooling
  • B. wetting
  • C. melting
  • D. drying
207.The following are uses of radioactive isotopes except for
  • A. Sterilization of medical equipment
  • B. Tracing reaction paths
  • C. Dating elements
  • D. Determining equilibrium positions
208.Which of the following is needed to produce a slag during the extraction of iron in the blast furnace?
  • A. Cryolite
  • B. Limestone
  • C. Carbon
  • D. Sulphur
209.Calcium atom ionizes by
  • A. Gaining two electrons
  • B. Losing two electrons
  • C. Sharing two electrons
  • D. Gaining two protons
210.In the periodic table, the elements that lose electron most readily belong to
  • A. Group IA
  • B. Group IIA
  • C. Group IIIA
  • D. Group VIIA
211.Which of the following halogens is the most reactive?
  • A. F₂
  • B. Br₂
  • C. Cl₂
  • D. I₂
212.Which of the following substances increase in mass when heated in air?
  • A. Sodium chloride
  • B. Iodine crystals
  • C. Magnesium ribbon
  • D. Copper(II)oxide
213.Which of the following properties increase down a group in the Periodic Table
  • A. Atomic radius
  • B. Electronegativity
  • C. Electron affinity
  • D. Ionization energy
214.Which of the following types of reactions takes place between C₂H₄ and the halogens?
  • A. Substitution
  • B. Addition
  • C. Polymerization
  • D. Oxidation
215.An amphoteric oxide is an
  • A. Amorphorous oxide of a metal
  • B. Amorphorous oxide of a non-metal
  • C. Oxide that is insoluble in water
  • D. Oxide that behaves as a base as well as an acid
216.What weight of sodium hydroxide is required to make 500cm³ of 0.2M solution?
  • A. 40g
  • B. 20g
  • C. 10g
  • D. 4g
217.The IUPAC names for the compounds of CH₃COOH and C₂H₄ are respectively
  • A. Acetic acid and ethane
  • B. Ethanoic acid and ethene
  • C. Methanoic acid and ethylene
  • D. Acetic acid and ethene