The oxidation state of Cr in K2Cr2O7 is?
A. +7 B. +6 C. +5 D. 4 Correct Answer: Option B = +6
The colour changes observed when testing for reducing agents using acidified potassium heptaoxodichromate (IV) solution is?
A. yellow to purple B. orange to green C. green to orange D. purple to yellow Correct Answer: Option B – orange to green
The salt formed from a reaction between citric acid and sodium hydroxide in solution will be?
A. acidic B. basic C. complex D. neutral Correct Answer: Option B – basic
What volume of 1.5M solution of KOH would contain 0.045 moles?
A. 67.50 cm³ B. 30.00 cm³ C. 6.75 cm³ D. 3.00 cm³ Correct Answer: Option B – 30.00 cm³Products
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