If the relative atomic mass of an element is not a whole number, it can be deduced that the element is?
- A. Naturally radioactive
- B. abundant in nature
- C. a transition metal
- D. an isotopic mixture
Organic molecules that have the suffix-ene are unsaturated hydrocarbons that have?
- A. a single bond
- B. a double bond
- C. a triple bond
- D. an ionic bond
The simplest branched-chain hydrocarbon is
- A. ethane
- B. ethene
- C. propane
- D. butane
The molecular formula of a common organic laboratory anaesthetic is
- A. CHCl3
- B. CHI3
- C. CCl4
- D. CHF3
Which of the following hydrocarbons is mainly used as fuel?
- A. Methylene
- B. Ethylene
- C. Methane
- D. Ethyne
An organic compound reacted with bromine water to give a colourless solution. The compound is probably an?
- A. alkene
- B. alkanal
- C. alkyl
- D. alkanone
A compound commonly used for sterilization and preservation of specimens and food is
- A. ethanol
- B. benzene
- C. ether
- D. ammonia
Lucas reagent is used to test for?
- A. alkanes
- B. alkanoic acids
- C. alkanols
- D. amines
Which of the following class of compounds can exist as dipolar ions in solution?
- A. Alkanoic acid
- B. Fatty acids
- C. Dialkanoic acids
- D. Amino acids
Which of the following molecules has two other positional isomers?
- A. CH3CH2Br
- B. CH3CHBrCH3
- C. CBr2F2
- D. CH2CHBrCH2Br
A cracking process in petroleum refining can be represented by
- A. heptane to heptene
- B. heptane to 3-methylhexane
- C. heptane to propene and butane
- D. heptane to 2,3,3-trimethybutane
One of the products of the thermal decomposition of sodium trioxonitrate (V) is?
- A. sodium
- B. nitrogen
- C. sodium dioxonitrate (III)
- D. sodium oxide
In the electrolytic extraction of aluminum, the function of the molten cryolite is to
- A. precipitate aluminium hdroxide
- B. lower the melting point of aluminium oxide
- C. act as a raw materials
- D. act as a solvent
The type of iron that is best suited for welding, making nails, chains and iron rods is?
- A. pig iron
- B. wrought iron
- C. cast iron
- D. iron pyrites
Copper metal dissolves in concentrated trioxonitrate (V) acid with the resultant evolution of?
- A. CO2
- B. SO2
- C. NO2
- D. CO
which of the following metals will show the highest metallic character?
- A. Zinc
- B. Copper
- C. Barium
- D. Calcium
Which of the following allotrope of carbon is a constituent of a lead pencil?
- A. Graphite
- B. Diamond
- C. Lampblack
- D. Soot
The gas that is most useful in protecting humans against solar radiation is?
- A. chlorine
- B. ozone
- C. carbon (IV) oxide
- D. hydrogen sulphide
The gasification of coke is used for the manufacturing of?
- A. producer gas
- B. natural gas
- C. synthetic gas
- D. industrial gas
Hydrogen sulphide gas can act as?
- A. an oxidizing agent
- B. a dehydrating agent
- C. a bleaching agent
- D. a precipitating agent
The oxidation of ammonia in excess air produces?
- A. NO
- B. N2O
- C. NO2
- D. N2O4