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CHEMISTRY OF THE ELEMENTS: Nitrogen
Chemistry Of The Elements: Sulphur
MATTER - PROPERTIES AND TRANSFORMATION: Acidic And Alkaline Solutions
MATTER - PROPERTIES AND TRANSFORMATION: Atomic Structure And The Periodic Table
MATTER - PROPERTIES AND TRANSFORMATION: Atoms
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry of Elements - Carbon
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry of Elements - Hydrogen
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry of Elements - Oxygen
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry of Elements - Phosphorus
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry of Elements - The Halogens
MATTER - PROPERTIES AND TRANSFORMATION: Structure And Bonding

5/94 MCQs for:

MATTER - PROPERTIES AND TRANSFORMATION: Chemistry of Elements - Carbon

What property of diamond makes it useful for cutting tools and abrasives?

It is opaque.

It is a good conductor of electricity.

It is a good lubricant.

It is the hardest known natural substance.

__ is the existence of an element in two or more forms but in the same physical state.

Polymorphism.

Isotopy.

Allotropes.

Allotropy.

An element that exhibits allotropy is:

Phosphorus.

All are correct.

Carbon.

Sulphur.

Which gas is produced when dilute hydrochloric acid is added to calcium carbonate (CaCO₃)?

Hydrogen.

Carbon dioxide.

Carbon monoxide.

Oxygen.

Graphite is a good conductor of electricity because:

Of the presence of free or mobile electrons in its crystal lattice.

Only three of the four valence electrons of each carbon are used in bonding and the fourth electron then becomes delocalized.

Of the presence of free or mobile electrons in its crystal lattice and only three of the four valence electrons of each carbon are used in bonding and the fourth electron then becomes delocalized.

Of the presence of free mobile ions in the crystal lattice.