General Science

Which of the following is most closely associated with acid rain?

A mass of one mole of a substance
B two or more atoms chemically bonded
C atom or group of atoms carrying net electric charge
D acidic precipitation associated mainly with sulfur and nitrogen oxides

Which statement correctly identifies anion?

A methods such as painting, galvanising or alloying that reduce corrosion
B negatively charged ion
C O3, allotrope of oxygen
D aqueous solution containing acetic acid

Which of the following is most closely associated with PTFE/Teflon?

A pure substance formed by chemical combination of elements in fixed proportions
B methods such as painting, galvanising or alloying that reduce corrosion
C O3, allotrope of oxygen
D fluoropolymer known for chemical resistance and low friction

Which of the following is most closely associated with pH?

A calcium hypochlorite-based bleaching/disinfecting material
B homogeneous mixture of solute and solvent
C ethanoic acid, CH3COOH
D measure related to hydrogen-ion activity/concentration

What is the best description of neutralisation?

A reaction between acid and base forming salt and usually water
B steel containing sufficient chromium for corrosion resistance
C solid fossil fuel formed largely from ancient plant matter
D polymer produced from ethene

Which of the following is most closely associated with element?

A large molecule made of repeating structural units
B pure substance whose atoms have the same atomic number
C mixture or solid solution of metals or metal with another element
D rapid reaction with an oxidant commonly releasing heat

What is the best description of stainless steel?

A calcium hypochlorite-based bleaching/disinfecting material
B ethanoic acid, CH3COOH
C steel containing sufficient chromium for corrosion resistance
D gas absorbing and emitting infrared radiation

Which of the following is most closely associated with valency?

A elements generally lacking typical metallic properties
B uncharged subatomic particle
C arrangement of elements by atomic number and recurring properties
D combining capacity of an atom or ion

Which of the following is most closely associated with petroleum?

A liquid hydrocarbon mixture from geological deposits
B coating iron or steel with zinc
C liquefied petroleum gas, mainly propane and butane
D fluoropolymer known for chemical resistance and low friction

What is the best description of endothermic reaction?

A reaction absorbing heat
B CO2, important greenhouse gas
C substance used to control pests
D smallest unit of an element retaining its chemical identity

Which statement correctly identifies noble gases?

A positively charged subatomic particle
B Group 17 elements
C Group 18 elements with very low reactivity
D positively charged ion

In general science, corrosion refers to:

A negatively charged ion
B negatively charged subatomic particle
C Group 17 elements
D chemical/electrochemical deterioration of a material

Which statement correctly identifies COD?

A methods such as painting, galvanising or alloying that reduce corrosion
B fertiliser supplying nitrogen, phosphorus and potassium
C sodium chloride
D chemical oxygen demand, oxygen equivalent needed for chemical oxidation of substances in water

Which statement correctly identifies methane?

A energy barrier associated with a reaction pathway
B synthetic polyamide polymer
C fossil fuel consisting mainly of methane
D CH4, simplest alkane and major natural-gas component

Which statement correctly identifies distillation?

A arrangement of elements by atomic number and recurring properties
B separation based mainly on differences in boiling points
C elements generally lacking typical metallic properties
D substance changing colour over a characteristic pH range

Which of the following is most closely associated with electrolysis?

A substance changing reaction rate without being consumed overall
B reaction between acid and base forming salt and usually water
C liquid hydrocarbon mixture from geological deposits
D chemical decomposition driven by electric current

Which of the following is most closely associated with nylon?

A an alcohol used in sanitizers, solvents and fuels
B CO2, important greenhouse gas
C substance used to control pests
D synthetic polyamide polymer

Which statement correctly identifies solute?

A substance producing ions in solution or molten state
B large molecule made of repeating structural units
C substance dissolved in a solution
D mixture or solid solution of metals or metal with another element

Which statement correctly identifies molar mass?

A positively charged ion
B Group 1 metals other than hydrogen
C mass of one mole of a substance
D positively charged subatomic particle

In general science, non-metals refers to:

A amorphous inorganic solid commonly based on silica
B reaction absorbing heat
C elements generally lacking typical metallic properties
D compressed natural gas, mainly methane

What is the best description of concentration?

A chemical/electrochemical deterioration of a material
B synthetic polyamide polymer
C amount of solute relative to a specified quantity
D surface vaporisation below boiling point

Which statement correctly identifies cation?

A CO2, important greenhouse gas
B an alcohol used in sanitizers, solvents and fuels
C positively charged ion
D calcium sulfate hemihydrate

In general science, evaporation refers to:

A surface vaporisation below boiling point
B polyvinyl chloride polymer
C corrosion product formed mainly on iron/steel
D liquid hydrocarbon mixture from geological deposits

Which of the following is most closely associated with monomer?

A small molecule that can form a polymer
B ethanoic acid, CH3COOH
C homogeneous mixture of solute and solvent
D calcium hypochlorite-based bleaching/disinfecting material

What is the best description of solute?

A polyvinyl chloride polymer
B substance changing reaction rate without being consumed overall
C substance dissolved in a solution
D liquid hydrocarbon mixture from geological deposits