1. Tardigrade
  2. Question
  3. Chemistry
  4. Column I Column II A Nascent hydrogen p Permutit B Hard water q Used as tracer in the study of reaction mechanism C Hydrogen peroxide r Reduces FeCl 3 to FeCl 2 D Heavy Water s Reduces Cr 2 O 72- to Cr 3+ t Reduces nitrobenzene to aniline for above column matching how many given matchings are correct. (A)-(r, s, t) ;(B)-(p) ;(C)-(r, s, t) ;(D)-(q)

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Q.
Column I Column II
A Nascent hydrogen p Permutit
B Hard water q Used as tracer in the study of reaction mechanism
C Hydrogen peroxide r Reduces $FeCl _{3}$ to $FeCl _{2}$
D Heavy Water s Reduces $Cr _{2} O _{7}^{2-}$ to $Cr ^{3+}$
t Reduces nitrobenzene to aniline

for above column matching how many given matchings are correct.
$(A)-(r, s, t) ;(B)-(p) ;(C)-(r, s, t) ;(D)-(q)$

Hydrogen

Solution:

(A) $FeCl _{3}+[ H ] \longrightarrow FeCl _{2}+ HCl$
$Cr _{2} O _{7}{ }^{2-}+[ H ] \longrightarrow\left[ Cr ^{2+}\right]+ H ^{+}$
(B) Hard water purified by permutit method
(C) Hydrogen peroxide is used as an oxidizing and also as a reducing agent.
(D) Heavy water is used as tracer in the study of reaction mechanism.