Which of the following is a phosphorescent compound?
is a phosphorescent compound and glows bright red when the light source is removed.
Hence option 3 is correct.
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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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