Chemistry
Select the correct answer from the options given in the brackets:
(a) The ion which is discharged at the cathode during the electrolysis of CuSO4 solution using copper electrodes. [Cu2+, OH-, SO42-, H+]
(b) During electroplating of an article with Ag using sodium argentocyanide as an electrolyte, the anode is made of. [Cu, Ag, Pt, Na]
Electrolysis
2 Likes
Answer
(a) Cu2+
Reason — During the electrolysis of CuSO4 solution using copper electrodes. Both Cu2+ and H+ ions migrate to the cathode, Cu2+ ions discharged as neutral copper atoms.
(b) Ag
Reason — During electroplating of an article with Ag using sodium argentocyanide as an electrolyte, the anode is the plate of pure clean silver.
Answered By
2 Likes
Related Questions
Match the Column A (showing the properties of H2SO4) with Column B (showing the reaction of H2SO4)
Column A
Properties of H2SO4Column B
Reaction of H2SO4(a) Acidic property 1. C12H22O11 + nH2SO4 ⟶ 12C + 11H2O + nH2SO4 (b) Dehydrating property 2. S + 2H2SO4 ⟶ 3SO2 + 2H2O (c) Non-volatile acid 3. CaO + H2SO4 ⟶ CaSO4 + H2O (d) Oxidizing agent 4. NaCl + H2SO4 ⟶ NaHSO4 + HCl Calcium oxide is a drying agent which removes water vapour. A student wanted to collect a dry sample of the hydrogen chloride gas produced. The student set up the apparatus as shown below but was unsuccessful in collecting any gas.
(a) What mistake did the student make?
(b) What change should be made by the student in order to collect the dry HCl gas?
Ethane C2H6 burns in oxygen to produce carbon dioxide and water as shown in the equation given below:
2C2H6 + 7O2 ⟶ 4CO2 + 6H2O
Calculate the composition of the resulting gaseous mixture at room temperature when 60 c.c. of ethane burns in 250 c.c. of oxygen.
Match the uses of alloys in List 1 with the appropriate answer from List 2.
List 1 List 2 (a) Used in making decorative articles. 1. Stainless steel (b) An alloy used in making aircraft and light tools. 2. Brass (c) Used in making surgical Instruments. 3. Duralumin