MCQ
What changes does not occur when $K_2Cr_2O_7$ react with $H_2O_2$ solution
- AOrange colour of solution turns blue
- ✓$O.S.$ of $Cr$ atom decreases
- C$O.S.$ of $Cr$ atom remains constant
- DNone of these
✓
Answer
Correct option: B.
$O.S.$ of $Cr$ atom decreases
b
$\mathop {{K_2}C{r_2}{O_7}}\limits_{\left( { + 6} \right)} + {H_2}{O_2} \to \mathop {\mathop {Cr{O_5}}\limits^{\left( { + 6} \right)} }\limits_{\left( {Blue\,Chromate} \right)} $
$\mathop {{K_2}C{r_2}{O_7}}\limits_{\left( { + 6} \right)} + {H_2}{O_2} \to \mathop {\mathop {Cr{O_5}}\limits^{\left( { + 6} \right)} }\limits_{\left( {Blue\,Chromate} \right)} $
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Considering the reaction sequence given below, the correct statement($s$) is(are)
→$(A)$ $P$ can be reduced to a primary alcohol using $NaBH _4$.
$(B)$ Treating $P$ with conc. $NH _4 OH$ solution followed by acidification gives $Q$.
$(C)$ Treating $Q$ with a solution of $NaNO _2$ in aq. $HCl$ liberates $N _2$.
$(D)$ $P$ is more acidic than $CH _3 CH _2 COOH$.
Which of the following species show $(s)$ synergic bonding
→'$A$' and ' $B$ ' formed in the following set of reactions are :
→When benzene diazonium chloride is reacted with compound y , a dye is formed, compound y is :
In a nucleotide the phosphate linkage is generally attached to -
The temperature coefficient of most of the reactions lies between
Ammonia on reaction with hypochlorite anion, can form
What is $Z$ in the following sequence of reaction
→$Z\xrightarrow{{PC{l_5}}}X\xrightarrow{{Alc.KOH}}Y\xrightarrow{{dil{H_2}S{O_4}}}Z$
If the rate of the reaction is equal to the rate constant, the order of the reaction is
The beta and alpha glucose have different specific rotations. When either is dissolved in water, their rotation changes until the same fixed value results. This is called