Let be in R. If and are the roots of the equation, and and are the roots of the equation, , then is equal to: Option: 1 27 Option: 2 18 Option: 3 9 Option: 4 36
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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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