Test Preparation on Electrochemistry-I-Chemistry Test Series For NEET-2020

On electrolysing a solution of dilute H₂SO₄ between platinum
electrodes, the gas evolved at the anode is

(a) SO₂   (b) IF₅
(c) O₂     (d) H₂

Sodium is made by the electrolysis of a molten mixture of about
40% NaCl and 60% CaCl₂ because

(a) CaCl₂ helps in conduction of electricity
(b) This mixture has a lower melting point than NaCl
(c) Ca⁺⁺ can displace Na from NaCl
(d) Ca⁺⁺ can reduce NaCl to Na

Electrolysis of molten anhydrous calcium chloride produces

The products formed when an aqueous solution of NaBr is
electrolysed in a cell having inert electrodes are

(a) Na and Br₂             (b) Na and O₂
(c) H₂, Br₂ and NaOH   (d) H2 and O₂

During electrolysis of aqueous NaOH, 4 g of O₂ gas is
liberated at NTP at anode, H₂ gas liberated at cathode is