Science, asked by lovleenmalpotra1234, 8 months ago

Q2 Define

(a) Combination reaction

(b) Decomposition reaction

(c)displacement reaction

(d) Double displacement reaction

(e) Strong acids & bases

(f) weak acids & bases

(g) Aqua regia

(h) Reactivity series (learn the series also)​

Answers

Answered by manishamallick2003
1

Answer:

2) a. A combination reaction is a reaction where two or more elements or compounds combine to form a single compound.

b. A decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more elements or new compounds.

Answered by karankirat345
0

Heya mate!!!

here's ur answer...

(a) The reaction in which two or more reactants combine to form a single product is known as combination reaction.

2Mg + O2 -----> 2MgO

(b) The reaction in which a single reactant decomposes to form one or more product is known as decomposition reaction.

It is of three types:

Thermal decomposition reaction: The reaction in which the reactant decomposes in the presence of heat.

2FeSO4 -----> Fe2O3 + SO2 + SO3

Photo decomposition reaction: The reaction in which the reactant decomposes in the presence of light.

2AgCl -----> 2Ag + Cl2

Electric decomposition reaction: The reaction in which the reactant decomposes in the presence of electric current.

2H2O -----> 2H2 + O2

(c) The reaction in which a more reactive metal displaces less reactive metal from its salt solution is known as displacement reaction.

Fe + CuSO4 -----> FeSO4 + Cu

(d) The reaction in which two compounds interchange their ions is known as double displacement reaction.

Na2S + 2HCl -----> 2NaCl + H2S

(e) A strong acid or strong base is one that ionizes completely in a solution.

Strong Acid -----> Hydrochloric acid (HCl)

Strong Base -----> Caustic soda (NaOH)

(f) A weak acid or weak base is one that does not ionize completely in a solution.

Weak Acid -----> Acetic acid (CH3COOH)

Weak Base -----> Hydrofluoric base (HF)

(g) Aqua Regia is a mixture of concentrated hydrochloric acid and concentrated nitric acid in the ratio 3 : 1 which is highly corrosive and can dissolve even gold and Platinum. it is also known as Royal water.

(h) Reactivity series is a series of metals arranged by their reactivity from highest to lowest.

Reactivity Series of Metals and Ions Formed

Caesium Cs+

Francium Fr+

Rubidium Rb+

Potassium K+

Sodium Na+

Lithium Li+

Barium Ba2+

Radium Ra2+

Strontium Sr2+

Calcium Ca2+

Magnesium Mg2+

Beryllium Be2+

Aluminium Al3+

Titanium Ti4+

Manganese Mn2+

Zinc Zn2+

Chromium Cr3+

Iron Fe3+

Cadmium Cd2+

Cobalt Co2+

Nickel Ni2+

Tin Sn2+

Lead Pb2+

Hydrogen H+ (Non-Metal, Reference for Comparison)

Antimony Sb3+

Bismuth Bi3+

Copper Cu2+

Tungsten W3+

Mercury Hg2+

Silver Ag+

Platinum Pt4+

Gold Au3+

Mark it as brainliest!!!

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