MCQ
Formaldehyde is used as formalin in industries:
- ATo preserve biological specimens
- BTo prepare bakelite
- ✓Both $A$ and $B$
- DNone of these
✓
Answer
Correct option: C.
Both $A$ and $B$
Formaldehyde is used as Formalin in industries as to preserve biological specimens and to prepare bakelite.
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 structure (figure) would be best classified as a(an)
Which of the following pairs of colloidal solutions have dispersed phase as liquid and dispersed medium as gas?
The strongest base among the following is
The calculated spin only magnetic moments $(BM)$ of the anionic and cationic species of ${\left[ {Fe{{\left( {{H_2}O} \right)}_6}} \right]_2}$ and $\left[ {Fe{{\left( {CN} \right)}_6}} \right]$ , respectively, are:
→When one of ampere current flows for $1\,\sec $ through a conductor, this quantity of electricity is known as
→The metal atom present in the complex MABXL (where $\mathrm{A}, \mathrm{B}, \mathrm{X}$ and $\mathrm{L}$ are unidentate ligands and $\mathrm{M}$ is metal) involves $\mathrm{sp}^3$ hybridization. The number of geometrical isomers exhibited by the complex is:
→The sum of lone pairs present on the central atom of the interhalogen $IF _5$ and $IF _7$ is $...........$.
→The compound which undergoes $S_{N^1}$ reaction most rapidly is
→$\begin{matrix}
O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{3}}-C-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C-H\xrightarrow{H{{O}^{-}}/\Delta }\underset{(73\%)}{\mathop{(A)}}\,; \\
\end{matrix}$ Product $(A)$ is
→O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{3}}-C-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C-H\xrightarrow{H{{O}^{-}}/\Delta }\underset{(73\%)}{\mathop{(A)}}\,; \\
\end{matrix}$ Product $(A)$ is
In the given reaction :
→$\begin{array}{*{20}{c}}
O \\
{||} \\
{{C_6}{H_5} - C - C{H_3}}
\end{array}\mathop {\xrightarrow{{(i)\,B{r_2}/KOH}}}\limits_{(ii)\,{H^ \oplus }} CHB{r_3} + [X]$
$[X]$ will be :