The effect of temperature on the value of Young's modulus of elasticity for various substances in general is

it increases with increase in temperature

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it remains constant

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it decreases with rise in temperature

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it sometimes increase and sometimes decreases with temperature.

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Solution

The correct option is C it decreases with rise in temperature
Elasticity decreases mostly with increase in temperature, and hence does Young's modulus, a measure of elasticity. One exception is invar steel.

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Normally, solubility of a crystalline solid increase with temperature. Does it increase uniformly in all cases ? Name a substance whose solubility :

(a) increase rapidly withe temperature.

(b) increase gradually with temperature.

(d) initially increases then decreases with rise in temperature.

Which of the following is correct for the solubility of CO₂in water?

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