Chemistry
If the equilibrium constants for the systems H2 + I2 ? 2HI and 2HI ? H2 + I2 are K1 and K2 respectively, the relationship between K1 and K2 is :

K1 = K2/2
K1 = 2K2
K1 = K2
K 1 = 1 /K2

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Chemistry
Assertion (A) : Synthetic detergents can lather wen in hard water.Reason (R) : Synthetic detergents form soluble calcium and magnesium salts with hard water.

A is true but R is false
A is false but R is true
Both A and R is true but R is not a correct explanation of A
Both A and R is true and R is the correct explanation of A

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