If the vertices of a triangle are rational points, which of the following point(s) of the triangle is (are) always rational point(s)?
centroid
circumcentre
incentre
orthocentre
It is quite clear that the centroid is the rational point only.
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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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