Words & Meanings

Question 0

Addition polymer

Answer 0

A long molecular chain formed by repeated units

Question 1

Acid

Answer 1

A proton donor

Question 2

Alkali

Answer 2

A type of base that dissolves in water to form hydroxide ion

Question 3

Calculating Atom economy

Answer 3

Molecular mass of desired product / sum of molecular masses of all products * 100

Question 4

Orbital

Answer 4

A region in an atom that contains up to 2 electrons in opposite spins

Question 5

Atomic number

Answer 5

Number of protons in a nucleus

Question 6

bond enthalpy

Answer 6

enthalpy change that takes place when 1 mole of a given type of bond is broken by homolytic fission in the molecules of a gaseous species

Question 7

Avogadro constant

Answer 7

6.02x10^23 mol

Question 8

Base

Answer 8

A proton acceptor

Question 9

CIS- tran isomerism

Answer 9

Cis (Z isomer) - has a H on each carbon on the same side

Tran (E isomer) - has has a H one each carbon but on different sides

Question 10

Covalent bond

Answer 10

A shared pair of electrons

Question 11

Cracking

Answer 11

The breaking down of long chains hydrocarbons into smaller chained alkenes or alkanes

Question 12

Dative covalent bond

Answer 12

Shared pair of electron which has been provided by one atom only

Question 13

Dehydration reaction

Answer 13

A reaction in which water is removed from a saturated molecule to make an unsaturated molecule

Question 14

Delocalised electrons

Answer 14

Electrons that are shared between two or more atoms

Question 15

Displacement reaction

Answer 15

A reaction where more reacting molecules displace less reactive molecules

Question 16

Displayed formula

Answer 16

A formular showing the relative positioning of all atoms in a compound and the bonds between then

Question 17

Disproportionation reaction

Answer 17

Is the oxidation and reduction of the same element in a redox reaction

Question 18

Dynamic equilibrium

Answer 18

The equilibrium that exist in a closed system when the rate of forward reaction is equal to the reverse reaction

Question 19

E/Z isomerism

Answer 19

The type of stereoisomerism in which different groups attached to each carbon with a double bond that are arranged differently in space because of the restriction of rotation

Question 20

Electronegativity

Answer 20

The measure of attraction of a bonded atom for the pair of electrons in a covalent bond

Question 21

Eletrophile

Answer 21

An atom or a group of atoms that are attracted to an electron rich centre. Where it accepts a pair of electrons to form a new covalent bond

Question 22

Elimination reaction

Answer 22

The removal of a molecule form a saturated molecule to make it unsaturated

Question 23

Empirical formula

Answer 23

The simplest whole number ratio of atoms of each element present in a compound

Question 24

Endothermic

Answer 24

A reaction in which the products are higher than the reactants resulting in heat being taken in from the surroundings

Question 25

Esterification

Answer 25

The reaction of an alcohol with a carboxylic acid to produce an ester and water

Question 26

Exothermic

Answer 26

A reaction in which the enthalpy of a product is smaller than the reactants resulting in a loss of heat to the surroundings

Question 27

Fractional distillation

Answer 27

The separation of the compounds in a liquid mixture into fractions which differ in boiling points

Question 28

Functional group

Answer 28

The part of the organic reaction that is responsible for it's chemical reaction

Question 29

General formula

Answer 29

The simplest algebraic formula of a member of a homologous series

Question 30

Heterolytic fission

Answer 30

The breaking of a covalent bond with both of the bonded electrons going to one of the atoms

Question 31

Homolytic fission

Answer 31

The breaking of a covalent bond with one of the bonded electrons going to each atom, forming two radicals

Question 32

Hydrogen bond

Answer 32

A strong dipole-dipole attraction between an electron deficient hydrogen atom on one molecule and a lone pair of electrons on a highly electronegative atom on a different molecule