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Question

Examples of slow reaction are:

A
rusting of iron
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B
weathering of rocks
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C
neutralization of sodium hydroxide by hydrochloric acid
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D
formation of coal
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Solution

The correct options are
A weathering of rocks
B rusting of iron
D formation of coal
Reactions that take a while are slow reactions and those which occur within a few seconds are fast reactions.
The rusting of iron, the fermentation of sugar into alcohol, the chemical weathering of rocks (breaking down of rocks), the photosynthesis process in plants, coal formation are slow reactions.
Whereas neutralization reaction of a strong base like sodium hydroxide and strong acid like HCl is a fast reaction.
Hence, options A, B, D are correct.

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