Must-Know Chemistry 2024

Front

Give a substance that oxidises acidified ethanol to ethanoic acid. 

Back

Potassium manganate(VII)

Front

State the physical property on which fractional distillation depends.

Back

Different boiling points.

Front

Describe the bonding and structure of ionic compounds.

Back

Giant lattice structure

Strong electrostatic forces of attraction between oppositely charged ions

Front

Describe how covalent substances cannot conduct electricity at all.

Back

Covalent substances have no free moving electrons or ions.

Front

Calculate the mass of one mole of water.

Back

Mass of 1 mole = 1 x (16 + 2(1))

= 18 g

Front

True or False?

pH is acidic or alkaline. 

Back

False statement.

pH is a number., usually from 0 to 14.

Front

Spot the mistake.

Elements in Group 18 are chemically unreactive as the elements have all electron shells full.

Back

Elements in Group 18 are chemically unreactive as the elements have full outer shell of electrons.

Front

Spot the mistake.

A hydrocarbon is a compound that contains carbon and hydrogen atoms.

Back

A hydrocarbon is a compound that contains only carbon and hydrogen atoms.

Front

Name a substance that reacts with bromine in UV light but not under normal conditions.

Back

Alkanes

Front

State general characteristics of compounds in the same homologous series.

Back

have same general formula;

have same functional group hence similar chemical properties;

shows a graduation in physical properties as the size of the compound increases;

each member differs from the next by a

-CH₂ group.