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Revise smart, understand Better

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

5/63 MCQs for:

MATTER - PROPERTIES AND TRANSFORMATION: Reaction With Oxygen of air

A chemical change in which substances combine with oxygen to form oxides is known as?

Galvanisation.

Rusting.

Pollution.

Burning.

Rusting requires the presence of?

Water and nitrogen.

Soap and water.

Water and Iron.

Water and oxygen.

If iron filings are heated with sulfur in a test tube, the resulting compound formed is:

Sulfur dioxide.

Iron(II) sulfide.

A mixture of iron and sulfur.

Iron(III) oxide.

What is the balanced symbol equation for the burning of magnesium?

2Mg(s) + O(g) → Mg₂O(s).

Mg(s) + 2O₂(g) → MgO₂(s).

Mg(s) + O₂(g) → MgO(s).

2Mg(s) + O₂(g) → 2MgO(s).

Which experimental setup would effectively demonstrate that both oxygen and water are necessary for rusting?

Iron nail exposed to air and tap water.

Iron nail in boiled, de-aerated water.

All of the above are needed for a complete experiment.

Iron nail in a closed tube with anhydrous calcium chloride.