The oxidation state of chlorine in HClO4 is?
A. -5 B. -1 C. +1 D. +7 Correct Answer: Option D = +7
What volume of 0.5 mol dm−³ H2SO4 will exactly neutralize 20cm³ of 0.1 mol dm−³ NaOH solution?
A. 2.0 cm³ B. 5.0 cm³ C. 6.8 cm³ D. 8.3 cm³ Correct Answer: Option A – 2.0 cm³ Explanation 2NaOH + H2SO4 → Na2SO4 + 2H2O CaVa/CbVb = ratio of acid/ratio of base (0.5 * Va)/(0.1 * 20) = 1/2 ∴ Va =...
Which of the following compound is a normal salt?
A. NaHS B. NaHSO4 C. NaHCO3 D. Na2CO3 Correct Answer: Option D – Na2CO3
Calcium tetraoxosulphate (VI) dissolves in water only sparingly to form a?
A. solution B. suspension C. precipitate D. colloid Correct Answer: Option C – precipitateProducts
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