The angle between the tangents drawn from a point on the circle to the circle is
Clearly, is the director circle of the circle
So, the angle between the tangents is a right angle.
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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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