The substance having the least specific heat among the
following is

Lead

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Aluminium

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Iron

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Copper

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Solution

The correct option is C Lead
Solution :
Specific heat is amount of heat required per unit mass of a substance to change its temperature by $1^{o} C$ .
Lead has the least specific heat of $0.128 \frac{J}{g m^{o} C}$ .
Hence the correct option is A.

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