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ENERGY: Action of electricity on materials
ENERGY: Action of heat on materials
MATTER - PROPERTIES AND TRANSFORMATION: Chemical Reactions And Equations
MATTER - PROPERTIES AND TRANSFORMATION: Chemical Symbols, Formulae And Valency
MATTER - PROPERTIES AND TRANSFORMATION: Effect Of Heat On Substances
MATTER - PROPERTIES AND TRANSFORMATION: Introduction To Chemistry - Symbols
MATTER - PROPERTIES AND TRANSFORMATION: Mixtures And Pure Substances
MATTER - PROPERTIES AND TRANSFORMATION: Periodic table - Families of elements and Relative reactivity
MATTER - PROPERTIES AND TRANSFORMATION: Reaction With Oxygen of air
MATTER - PROPERTIES AND TRANSFORMATION: The Atom And Sub-Atomic Particles
5/80 MCQs for:
MATTER - PROPERTIES AND TRANSFORMATION: Chemical Symbols, Formulae And Valency
What is the valency of Nitrogen (N) in ammonia (NH₃)?
1.
4.
3.
2.
Dalton's atomic theory stated that atoms are indivisible. What modern discovery disproved this part of his theory?
The concept of molecules.
The discovery of elements.
The existence of compounds.
The discovery of subatomic particles (protons, neutrons, electrons).
An element is a simple substance which cannot be further split into simpler substances by any __ means
Mechanical
Physical
Chemistry
Chemical
What is the correct formula for Ammonium Sulphate, given Ammonium radical (Valency 1) and Sulphate radical (Valency 2)?
NH₄(SO₄)₂.
(NH₄)₂SO₄.
NH₄SO₄.
(NH₄)SO₄.
What is the chemical symbol for Iron?
Fe.
Io.
In.
Ir.
