Which one of the following is an oxide ? Option: 1 KO2 Option: 2 BaO2 Option: 3 SiO2 Option: 4 CsO2
SiO2 - oxide
KO???2? , CsO????2 - superoxides
BaO????2 - peroxide
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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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