The oxidation state of oxygen in tetraoxosulphate (VI) acid is?
A. -4 B. -2 C. +4 D. -8 Correct Answer: Option B = -2
Calculate the number of moles of HCl present in 20cm³ of a 0.75M solution of the acid?
A. 0.015 mole B. 0.038 mole C. 3.800 moles D. 1.500 moles Correct Answer: Option A – 0.015 mole Explanation Number of moles = (conc. in mol/dm³ X volume in cm³)/1000 (0.75 X 20)/100 = 0.015 mole
Dissolving some pellets of NaOH in water would result in?
A. a decrease in the free energy of the solution B. a decrease in the entropy of the solution C. a lowering of the temperature of the solution D. an increase in the entropy of the solution Correct Answer: Option D – an increase in the entropy of the...
The salt formed from strong acid and a strong base is?
A. complex B. neutral C. basic D. acidic Correct Answer: Option B – neutralProducts
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