Question

Explain the types of reaction with
reference to oxygen and hydrogen.
Illustrate with examples.
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Answer 1

Answer:

ᴏxɪᴅᴀᴛɪᴏɴ: (ɪ) ᴛʜᴇ ᴀᴅᴅɪᴛɪᴏɴ ᴏғ ᴏxʏɢᴇɴ ᴛᴏ ᴀ sᴜʙsᴛᴀɴᴄᴇ ɪs ᴄᴀʟʟᴇᴅ ᴏxɪᴅᴀᴛɪᴏɴ. (ɪɪ) ᴛʜᴇ ʀᴇᴍᴏᴠᴀʟ ᴏғ ʜʏᴅʀᴏɢᴇɴ ᴛᴏ ᴀ sᴜʙsᴛᴀɴᴄᴇ ɪs ᴄᴀʟʟᴇᴅ ᴏxɪᴅᴀᴛɪᴏɴ.sᴏ, ʜʏᴅʀᴏɢᴇɴ ɪs ʙᴇɪɴɢ ᴏxɪᴅɪsᴇᴅ ᴛᴏ ᴡᴀᴛᴇʀ.

Answer 2

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There are main four types of chemical reactions. They are :-

1. Combination Reaction :

A reaction in which a single product is formed from 2 or more reactants is called as combination reaction.

Example :

• CaO + H20 ➔Ca(OH)2

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2. Decomposition Reaction :

When a compound or an element breaks down into simple molecular substances from which it is made is known as decomposition reaction.

Example :

• CaCO3 ➔CaO + CO2 ( in presence of heat)

★ It is further of 3 types :

1. Thermal decomposition
2. Electrolytic decomposition
3. Photolytic decomposition

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3. Displacement Reaction :

When a highly or strong reactive metal displaces a low reactive metal it is said to be displacement reaction.

Example :

• Zn + CuSO4 ➔ ZnSO4 + Cu

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4. Double Displacement Reaction (optional) :

A type of chemical reaction where two compounds react, and the positive ions and the negative ions of the two reactants displaces or switches, forming two new compounds or products.

Example :

• Na2SO4 + BaCl2 ➔ BaSO4 + 2NaCl

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