Chemical reactions and equation- chp 1

________: When fats and oils stay in open for a long, they get oxidized and become ________ (old and stale), and their smell and taste change.

________: The opposite of a combination reaction- a complex molecule breaks down to make simpler ones.

________: One element takes place with another element in the compound.

________: A chemical reaction in which ions get exchanged between two reactants which form a new compound.

If a substance loses or gains hydrogen it is ________.

When a(n) ________ is carried out by heating, it is called thermal decomposition.

It is a process where one or more substances foamed new substances and it cant be reversed by physical methods

Mass can neither be created nor destroyed in a chemical equation

They are chemical reactions that produce heat

Chemical reactions in which the reactants absorb heat energy from the surroundings to form products

Two or more compounds combine to form one compound

One element takes place with another element in the compound

A chemical reaction in which ions get exchanged between two reactants which form a new compound

A reaction involving both oxidation and reduction simultaneously means one reactant gets oxidized, and the other gets reduced

Corrosion is the process of slowly eating up metals by gas and water vapours present in the atmosphere due to the formation of certain compounds like oxide, sulphides, carbonate, etc

When fats and oils stay in open for a long, they get oxidized and become rancid (old and stale), and their smell and taste change

Fe₃O₄ + H₂

Ca(OH)(aq) + heat

CaCO₃(s) + H₂O(l)

CO₂(g)

2H₂O(l)

Fe₂O₃(s) + SO₂(g)+SO₃(g)

CaO(s) + CO₂(g)

2PbO(s) + 4NO₂(g) + O₂(g)

2Ag(s) + Cl₂(g)

2Ag(s) + Br₂(g)

FeSO4₄ + Cu(s)

ZnSO4(aq) + Cu(s)

PbCl₂(aq) + Cu(s)

2CuO

Cu + H₂O

Zn + CO

MnCl₂ + 2H₂O + Cl₂