Consider the following pairs (Types of Chemical Weathering : Characteristics):

I. Solution : Results in leaching of minerals

II. Carbonation : Helps in breaking down feldspars

III. Hydration : Causes an increase in the volume of rocks

IV. Oxidation : Changes the colour of rocksA.OneB.TwoC.ThreeD.All the four

Question

Consider the following pairs (Types of Chemical Weathering : Characteristics): I. Solution : Results in leaching of minerals II. Carbonation : Helps in breaking down feldspars III. Hydration : Causes an increase in the volume of rocks IV. Oxidation : Changes the colour of rocks

Accepted Answer

All the four. Pair I is correctly matched. Solution weathering dissolves soluble minerals, washing them away as leached-out material. Pair II is correctly matched. Carbonation happens when carbon dioxide dissolves in water to form a weak carbonic acid. This acid reacts with minerals like feldspar, breaking them down into softer clay minerals. Pair III is correctly matched. In hydration, minerals chemically absorb water molecules and physically swell up. This swelling increases the rock's overall volume, often cracking it apart from the inside. Pair IV is correctly matched. Oxidation happens when oxygen reacts with metals in the rock, forming oxides. This reaction often turns the rock a reddish or rust-brown colour, a visible sign of oxidation. So all four pairs are genuinely correct, making option (d) the answer.

Consider the following pairs (Types of Chemical Weathering : Characteristics): I. Solution : Results in leaching of minerals II. Carbonation : Helps in breaking down feldspars III. Hydration : Causes an increase in the volume of rocks IV. Oxidation : Changes the colour of rocks

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