General Science

In general science, proton refers to:

A mixture or solid solution of metals or metal with another element
B positively charged subatomic particle
C substance dissolved in a solution
D substance producing ions in solution or molten state

Which statement correctly identifies vinegar?

A reaction between acid and base forming salt and usually water
B aqueous solution containing acetic acid
C substance changing reaction rate without being consumed overall
D Group 17 elements

Which statement correctly identifies neutralisation?

A amorphous inorganic solid commonly based on silica
B reaction between acid and base forming salt and usually water
C chemical decomposition driven by electric current
D temperature at which solid and liquid coexist at specified pressure

Which of the following is most closely associated with alkali metals?

A Group 1 metals other than hydrogen
B polymer produced from ethene
C solid fossil fuel formed largely from ancient plant matter
D reaction involving oxidation and reduction together

Which of the following is most closely associated with metalloids?

A iron-based alloy containing carbon
B elements showing intermediate metal/non-metal properties
C separation based mainly on differences in boiling points
D component that dissolves the solute

In general science, redox reaction refers to:

A SI amount-of-substance unit containing Avogadro’s number of entities
B acidic precipitation associated mainly with sulfur and nitrogen oxides
C reaction involving oxidation and reduction together
D positively charged subatomic particle

Which statement correctly identifies plaster of Paris?

A material supplying plant nutrients
B combination of substances retaining their chemical identities
C calcium sulfate hemihydrate
D number of protons plus neutrons

What is the best description of noble gases?

A Group 18 elements with very low reactivity
B methods such as painting, galvanising or alloying that reduce corrosion
C pure substance formed by chemical combination of elements in fixed proportions
D number of protons in the nucleus

Which statement correctly identifies acid rain?

A gas absorbing and emitting infrared radiation
B calcium hypochlorite-based bleaching/disinfecting material
C ethanoic acid, CH3COOH
D acidic precipitation associated mainly with sulfur and nitrogen oxides

In general science, greenhouse gas refers to:

A gas absorbing and emitting infrared radiation
B calcium oxide
C NH3, basic nitrogen compound used in fertilisers
D salts of higher fatty acids

What is the best description of matter?

A pure substance whose atoms have the same atomic number
B uncharged subatomic particle
C combining capacity of an atom or ion
D anything having mass and occupying space

In general science, quicklime refers to:

A vertical column in the periodic table
B calcium oxide
C elements showing intermediate metal/non-metal properties
D acid-base indicator red in acid and blue in base

In general science, COD refers to:

A positively charged subatomic particle
B SI amount-of-substance unit containing Avogadro’s number of entities
C chemical oxygen demand, oxygen equivalent needed for chemical oxidation of substances in water
D CO, toxic product of incomplete combustion

What is the best description of natural gas?

A elements generally showing conductivity, malleability and ductility
B combining capacity of an atom or ion
C fossil fuel consisting mainly of methane
D ionic compound of cations and anions

In general science, pH refers to:

A measure related to hydrogen-ion activity/concentration
B coating iron or steel with zinc
C temperature at which vapour pressure equals surrounding pressure
D salts of higher fatty acids

Which statement correctly identifies element?

A elements showing intermediate metal/non-metal properties
B pure substance whose atoms have the same atomic number
C acid-base indicator red in acid and blue in base
D vertical column in the periodic table

Which statement correctly identifies electron?

A iron-based alloy containing carbon
B small molecule that can form a polymer
C separation based mainly on differences in boiling points
D negatively charged subatomic particle

What is the best description of atom?

A reaction between acid and base forming salt and usually water
B Group 17 elements
C smallest unit of an element retaining its chemical identity
D substance changing reaction rate without being consumed overall

In general science, compound refers to:

A small molecule that can form a polymer
B gain of electrons or decrease in oxidation state
C substance releasing usable energy in combustion or another process
D pure substance formed by chemical combination of elements in fixed proportions

What is the best description of ammonia?

A NH3, basic nitrogen compound used in fertilisers
B reaction releasing heat
C liquefied petroleum gas, mainly propane and butane
D substance changing colour over a characteristic pH range

Which statement correctly identifies endothermic reaction?

A combining capacity of an atom or ion
B reaction absorbing heat
C uncharged subatomic particle
D pure substance whose atoms have the same atomic number

Which of the following is most closely associated with polyethylene?

A sodium chloride
B sodium hydrogen carbonate, NaHCO3
C fertiliser supplying nitrogen, phosphorus and potassium
D polymer produced from ethene

What is the best description of glass?

A component that dissolves the solute
B separation based mainly on differences in boiling points
C sodium carbonate decahydrate
D amorphous inorganic solid commonly based on silica

What is the best description of washing soda?

A ethanoic acid, CH3COOH
B gas absorbing and emitting infrared radiation
C calcium hypochlorite-based bleaching/disinfecting material
D sodium carbonate decahydrate

Which statement correctly identifies carbon dioxide?

A CO2, important greenhouse gas
B synthetic surfactant used for cleaning
C temperature at which solid and liquid coexist at specified pressure
D calcium hydroxide