SATHEE: P-Block Elements Ques 194

P-Block Elements Ques 194

Question: In which of the following pairs does the first gas bleaches flowers by reduction while the second gas does so by oxidation

[Manipal MEE 1995]

Options:

A) $C O$ and $C l_{2}$

B) $S O_{2}$ and $C l_{2}$

C) $H_{2}$ and $B r_{2}$

D) $N H_{3}$ and $S O_{2}$

Show Answer

Answer:

Correct Answer: B

Solution:

$S O_{2}$ bleaches flower by reduction $2 H_{2} O + S O_{2} \to H_{2} S O_{4} + 2 [H]$ $2 [H] + \underset{f l o w e r}{C o l o u r e d} \overset{R e d u c t i o n}{\to} \underset{reduced flower}{C o l o u r l e s s}$

This bleaching is temporary because reduced flower again oxidised by air to form coloured flower $C l_{2} + H_{2} O \to 2 H C l + [O]$ $[O] + \underset{f l o w e r}{C o l o u r e d} \overset{O x i d a t i o n}{\to} \underset{Oxidised flower}{C o l o u r l e s s}$

This bleaching is permanent because oxidised flower remains colourless.

Play Store

App Store

Ask SATHEE

Welcome to SATHEE !
Select from 'Menu' to explore our services, or ask SATHEE to get started. Let's embark on this journey of growth together! 🌐📚🚀🎓

I'm relatively new and can sometimes make mistakes.
If you notice any error, such as an incorrect solution, please use the thumbs down icon to aid my learning.
To begin your journey now, click on "I understand".

P-Block Elements Ques 194

Question: In which of the following pairs does the first gas bleaches flowers by reduction while the second gas does so by oxidation

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Menu