MCQ
The charring of sugar, when treated with conc. ${H_2}S{O_4},$ is due to
- AOxidation
- BReduction
- ✓Dehydration
- DHydrolysis
✓
Answer
Correct option: C.
Dehydration
c
(c)Charring of sugar, when it is treated with sulphuric acid $({H_2}S{O_4})$ is due to dehydration. In this reaction water is removed from the sugar.
(c)Charring of sugar, when it is treated with sulphuric acid $({H_2}S{O_4})$ is due to dehydration. In this reaction water is removed from the sugar.
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
The electronic configuration for Neodymium is: [Atomic Number for Neodymium $60$]
→Generally metal ion and their salts are coloured due to presence of unpaired electrons in metal ions. Which of the following compounds are coloured
Match the compounds given in List$-I$ with List$-II$ and select the suitable option using the code given below.
→| List $-I$ | List $-II$ |
| $(A)$ Benzaldehyde | $(i)$ Phenolphthalein |
| $(B)$ Phthalic anhydride | $(ii)$ Benzoincondensation |
| $(C)$ Phenyl benzoate | $(iii)$ Oil of wintergreen |
| $(D)$ Methyl salicylate | $(iv)$ Friesre arrangement |
An optically active compound $X$ has molecular formula $C_4H_8O_3.$ It evolves $CO_2$ with $NaHCO_3.$ $'X' $ Reacts with $LiAlH_4$ to give an achiral compound. $'X'$ is
→The rate constants for decomposition of acetaldehyde have been measured over the temperature range $700-1000\, K$. The data has been analysed by plotting $ln\, k\,$vs$\,\frac{10^{3}}{ T }$ graph. The value of activation energy for the reaction is $......\,kJ mol ^{-1}$. (Nearest integer) (Given : $R =8.31\, J \,K ^{-1} \,mol ^{-1}$ )
→The reaction is called $\begin{array}{*{20}{c}}
{2C{H_3} - C - O{C_2}{H_5}} \\
{||\,\,\,} \\
{O\,\,\,}
\end{array}$ ${\xrightarrow{{{C_2}{H_5}ONa}}}$ $\begin{array}{*{20}{c}}
{C{H_3} - C - C{H_2} - C - O{C_2}{H_5}} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,} \\
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O\,\,\,\,\,}
\end{array}$ $ + \,{C_2}{H_5}OH$
→{2C{H_3} - C - O{C_2}{H_5}} \\
{||\,\,\,} \\
{O\,\,\,}
\end{array}$ ${\xrightarrow{{{C_2}{H_5}ONa}}}$ $\begin{array}{*{20}{c}}
{C{H_3} - C - C{H_2} - C - O{C_2}{H_5}} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,} \\
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O\,\,\,\,\,}
\end{array}$ $ + \,{C_2}{H_5}OH$
How is the rate of enzyme catalysed reactions affected by 10°C rise of temperature?
An organic halide is shaken with aqueous $NaOH$ followed by the addition of dil. $HN{O_3}$ and silver nitrate solution gave white ppt. The substance can be
→Which one of the following compounds will give orange precipitate when treated with $2,4-$ dinitrophenyl hydrazine?
→How many of the following metal ions have similar value of spin only magnetic moment in gaseous state?
→(Given: Atomic number: $V , 23 ; Cr , 24 ; Fe , 26;Ni , 28)$
$V ^{3+} \cdot Cr ^{3+}, Fe ^{2+}, Ni ^{3+}$