Book Online Demo
Check Your IQ

Courses

Class - 11 JEE CourseClass - 11 NEET CourseClass - 12 JEE CourseClass - 12 NEET CourseDropper JEE CourseDropper NEET CourseClass - 10 Foundation JEE CourseClass - 10 Foundation NEET CourseClass - 10 CBSE CourseClass - 9 Foundation JEE CourseClass -9 CBSE CourseClass - 8 CBSE CourseClass - 7 CBSE CourseClass - 6 CBSE Course

Q.

Which statement about electrolysis reaction is correct?


see full answer

Want to Fund your own JEE / NEET / Foundation preparation ??

Take the SCORE scholarship exam from home and compete for scholarships worth ₹1 crore!*
An Intiative by Sri Chaitanya

a

When concentrated aqueous sodium chloride is electrolysed, sodium forms at the anode.

b

When concentrated hydrochloric acid is electrolysed, a green gas forms at the cathode.

c

When dilute sulfuric acid is electrolysed, a colourless gas forms at both electrodes.

d

When molten lead (II) bromide is electrolysed, lead forms at the anode. 

answer is C.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Concept- Electrolysis is defined as the process of breaking down ionic compounds into their elements by passing direct current through the compound in liquid form. Cations get reduced at the cathode and anions get oxidised at the anode.
When concentrated aqueous sodium chloride is electrolyzed, water can also undergo reduction and oxidation reactions at different potentials. At the cathode, water can be reduced to hydrogen gas or sodium ions can be reduced to metallic sodium. So sodium is formed at the cathode. Therefore, option 1 is incorrect.
During the electrolysis of concentrated hydrochloric acid, chlorine gas is formed at the anode, resulting in a green colour. Thus, no green gas is formed at the cathode. So option 2 is incorrect.
During the electrolysis of dilute sulphuric acid, hydrogen gas is produced at the cathode and oxygen gas at the anode. Since both are colourless gas, option 3 is correct.
During the electrolysis of molten lead bromide, lead atoms are formed at the cathode and bromine molecules are formed at the anode. So option 4 is incorrect.
Hence, the correct answer is 3.
 
Watch 3-min video & get full concept clarity
Related Blogs
Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
Result Producing online coaching for JEE/NEET of south India
Largest All India Test Series for JEE/NEET
Best Books for IIT JEE
Best Books for NEET
score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

Related Blogs
Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
Result Producing online coaching for JEE/NEET of south India
Largest All India Test Series for JEE/NEET
Best Books for IIT JEE
Best Books for NEET
whats app icon