Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • How long should the current of 25 amp. is passed to produce <img alt="10 \% \mathrm{Na}-\mathrm{Hg}" src="https://entrancecorner.oncodecogs.com/gif.latex?10%20%5C%25%20%5Cmathrm%7BNa%7D-%5Cmat

How long should the current of 25 amp. is passed to produce 10 \% \mathrm{Na}-\mathrm{Hg} on a cathode of  1 0\mathrm{g} \mathrm{H} \mathrm{g}  here  \mathrm{Na}- amalgam is prepared by electrolysis of NaCl solution using liquid Hg as cathode

Option: 1

12min


Option: 2

9min


Option: 3

8min


Option: 4

3min


Answers (1)

best_answer

90 \mathrm{~g} \mathrm{Hg}  has 10 \mathrm{~g}$ of $\mathrm{Na}
\mathrm{10 \mathrm{~g} H g=\frac{10}{90} \times 10=\frac{10}{g} \mathrm{~g} \mathrm{Na} \\ }

\text { Weight of } \mathrm{Na}=\frac{M}{n} \times \frac{i \times t}{96500} \\

\frac{10}{g}=\frac{23}{1} \times \frac{25 \times t}{96500} \\

t=\frac{10 \times 96500}{9 \times 25 \times 23} \\

\mathrm{ t=3.1 \mathrm{~min} }.

Posted by

shivangi.bhatnagar

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2026 session 2 application correction begins on jeemain.nta.nic.in; edit details by tomorrow
anam-khan

JEE Main 2026 Registration LIVE: Session 2 exam from April 2 to 9; shift timings, admit card, exam pattern
anam-khan

JEE Main 2026 session 2 registration ends today for BTech, BArch; apply at jeemain.nta.nic.in

Latest Question