# JEE 2015 Problem(Open discussion)

Here is a problem of chemistry from JEE 2015 Paper 1

You can have a look at Q37

It talks about reduction of Ferric ions to ferrous by using Hydrogen peroxide

I Was not able to get the answer to the problem . hence i searched youtube and got a nice practical explanation

according to the practical done no choice is correct but unfortunately in official keys answer was Given as AB.

Note by Prakhar Bindal
3 years, 4 months ago

This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.

When posting on Brilliant:

• Use the emojis to react to an explanation, whether you're congratulating a job well done , or just really confused .
• Ask specific questions about the challenge or the steps in somebody's explanation. Well-posed questions can add a lot to the discussion, but posting "I don't understand!" doesn't help anyone.
• Try to contribute something new to the discussion, whether it is an extension, generalization or other idea related to the challenge.

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold

- bulleted
- list

• bulleted
• list

1. numbered
2. list

1. numbered
2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1

paragraph 2

paragraph 1

paragraph 2

> This is a quote
This is a quote
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in $$...$$ or $...$ to ensure proper formatting.
2 \times 3 $2 \times 3$
2^{34} $2^{34}$
a_{i-1} $a_{i-1}$
\frac{2}{3} $\frac{2}{3}$
\sqrt{2} $\sqrt{2}$
\sum_{i=1}^3 $\sum_{i=1}^3$
\sin \theta $\sin \theta$
\boxed{123} $\boxed{123}$

Sort by:

- 3 years, 3 months ago

Based on what percentage of reagents were used in that video usually in paper rxn with conc H2SO4 means 100% of it but in lab even conc consists ard 50% diluted H2SO4 to prevent 3rd degree burn but its chemistry so can't say confidently.

- 3 years, 4 months ago

But even by theory i found a satisfactory explanation why the answer should be cd Rather

- 3 years, 4 months ago

why not close the discussion then , if your doubt is resolved !

- 3 years, 4 months ago

Sorry i meant CD! Typo! . i found a nice explanation why CD Should be answer rather

- 3 years, 4 months ago

Yes , maybe the answer key is wrong ! they did'nt consider the practical view point and relieved only on the theoretical view point , BUT , also i have seen in some books earlier giving the answer as AB , so nothing can be done now , CONCLUSION : you should read more books !

- 3 years, 4 months ago