How many electrons are removed from Cr²- when it is oxidized to CrO4²-?
A. 0 B. 2 C. 4 D. 8 E. 10 Correct Answer: Option C – 4
What mass of copper would be deposited by a current of 1. 0 ampere passing for 965 seconds through copper (ll) tetraoxosulphate (IV) solution? [Cu = 63.5; 1F = 96500C]
A. 0.318g B. 0.635g C. 18g D. 6.35g E. 9.65g Correct Answer: Option A Explanation Cu²+ + 2e- → Cu, From the equation 2 Faraday will liberate 63.5gm of copper. The quantity of electricity passed (Q) Q = 1. 0 965 = 965 coulomb :. 2 x 96500 → 63.5, 965 → x. x = 965 /...
Which of the following will produce oxygen and hydrogen during its electrolysis using platinum electrode?
A. Glucose solution B. Aqueous copper (ll) tetraoxosulphate (IV) C. Dilute sodium chloride solution D. Concentrated hydrochloric acid E. Dilute copper (ll) chloride solution Correct Answer: Option C – Aqueous copper (ll) tetraoxosulphate...
What is the function of sulphur (IV) oxide in the reaction represented by the following equation? SO2(aq) + 2H2S(g) → 3S (s) + 2H2O (l)
A. Dehydrating agent B. Oxidising agent C. Bleaching agent D. Acid E. Precipitant Correct Answer: Option B – Oxidising agentProducts
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