A circle C of unit radius lies in the first quadrant and touches both the axes. The circle touches both the axes and intersects C such that the common chord is longest. Its radius is
The common chord is
or
If lies on (i)
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50 mL of 0.2 M ammonia solution is treated with 25 mL of 0.2 M HCl. If pKb of ammonia solution is 4.75, the pH of the mixture will be : Option: 1 3.75 Option: 2 4.75
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