Chemical reactions and equation- chp 1

Rancidity

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

Decomposition reaction

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

Displacement Reaction

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

Double displacement reaction

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

reduction

If a substance loses or gains hydrogen it is ________.

decomposition reaction

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

Chemical reaction

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

Law of conversion of mass

Mass can neither be created nor destroyed in a chemical equation

Exothermic reaction

They are chemical reactions that produce heat

Endothermic reaction

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

combination reaction

Two or more compounds combine to form one compound

Displacement Reaction

One element takes place with another element in the compound

Double displacement reaction

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

Oxidation and Reduction reaction

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

Corrosion

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

Rancidity

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

Fe + H₂O

Fe₃O₄ + H₂

CaO(s) + H₂O(l)

Ca(OH)(aq) + heat

Ca(OH)(aq) + CO₂(g)

CaCO₃(s) + H₂O(l)

C(s) + O₂(g)

CO₂(g)

2H₂(g) + O₂(g)

2H₂O(l)

2FeSO₄(s)

Fe₂O₃(s) + SO₂(g)+SO₃(g)

CaCO₃(s)

CaO(s) + CO₂(g)

2Pb(NO₃)₂(s)

2PbO(s) + 4NO₂(g) + O₂(g)

2AgCl(s)

2Ag(s) + Cl₂(g)

2AgBr(s)

2Ag(s) + Br₂(g)

Fe(s) + CuSO₄

FeSO4₄ + Cu(s)

Zn(s) + CuSO4(aq)

ZnSO4(aq) + Cu(s)

Pb(s) + CuCl₂(aq)

PbCl₂(aq) + Cu(s)

Na₂SO₄(aq) + BaCl₂(aq)

2Cu + O₂

2CuO

CuO + H₂

Cu + H₂O

ZnO + C

Zn + CO

MnO₂ + 4HCl

MnCl₂ + 2H₂O + Cl₂