15. POLYMERS
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POLYMERS

19615 When melamine and formaldehyde polymerise, a resin intermediate is formed. Identify  the structure of this intermediate :-

1 818-a490
2 818-b490
3 818-c490
4 818-d490
POLYMERS

19699 Natural fiber is

1 Bakelite
2 Cellulose
3 Rubber
4 Nylon \(-6\)
POLYMERS

19700 Which of the following is incorrectly matched

1 Nylon \(-6\)      :      Caprolactum
2 \(PHBV\)      :      Biodegradable polymer
3 Decron      :      Fibre
4 Low density polyethene\((LDPE)\)      :      Ziegler-Natta catalyst
POLYMERS

19701 Structure of monomer unit of natural rubber is

1 $\begin{array}{*{20}{c}}
{Cl\,\,\,\,\,\,\,\,\,\,\,\,}\\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{{H_2}C = C - CH = C{H_2}}
\end{array}$
2 $\begin{array}{*{20}{c}}
{{H_2}C = C - CH = C{H_2}}\\
{\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{{C_6}{H_5}\,\,\,\,\,}
\end{array}$
3 $\begin{array}{*{20}{c}}
{{H_2}C = C - CH = C{H_2}}\\
{\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{C{H_3}\,\,\,\,\,\,\,}
\end{array}$
4 \((-CH_2-CH_2-)_n\)
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POLYMERS

19615 When melamine and formaldehyde polymerise, a resin intermediate is formed. Identify  the structure of this intermediate :-

1 818-a490
2 818-b490
3 818-c490
4 818-d490
POLYMERS

19699 Natural fiber is

1 Bakelite
2 Cellulose
3 Rubber
4 Nylon \(-6\)
POLYMERS

19700 Which of the following is incorrectly matched

1 Nylon \(-6\)      :      Caprolactum
2 \(PHBV\)      :      Biodegradable polymer
3 Decron      :      Fibre
4 Low density polyethene\((LDPE)\)      :      Ziegler-Natta catalyst
POLYMERS

19701 Structure of monomer unit of natural rubber is

1 $\begin{array}{*{20}{c}}
{Cl\,\,\,\,\,\,\,\,\,\,\,\,}\\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{{H_2}C = C - CH = C{H_2}}
\end{array}$
2 $\begin{array}{*{20}{c}}
{{H_2}C = C - CH = C{H_2}}\\
{\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{{C_6}{H_5}\,\,\,\,\,}
\end{array}$
3 $\begin{array}{*{20}{c}}
{{H_2}C = C - CH = C{H_2}}\\
{\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{C{H_3}\,\,\,\,\,\,\,}
\end{array}$
4 \((-CH_2-CH_2-)_n\)
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POLYMERS

19615 When melamine and formaldehyde polymerise, a resin intermediate is formed. Identify  the structure of this intermediate :-

1 818-a490
2 818-b490
3 818-c490
4 818-d490
POLYMERS

19699 Natural fiber is

1 Bakelite
2 Cellulose
3 Rubber
4 Nylon \(-6\)
POLYMERS

19700 Which of the following is incorrectly matched

1 Nylon \(-6\)      :      Caprolactum
2 \(PHBV\)      :      Biodegradable polymer
3 Decron      :      Fibre
4 Low density polyethene\((LDPE)\)      :      Ziegler-Natta catalyst
POLYMERS

19701 Structure of monomer unit of natural rubber is

1 $\begin{array}{*{20}{c}}
{Cl\,\,\,\,\,\,\,\,\,\,\,\,}\\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{{H_2}C = C - CH = C{H_2}}
\end{array}$
2 $\begin{array}{*{20}{c}}
{{H_2}C = C - CH = C{H_2}}\\
{\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{{C_6}{H_5}\,\,\,\,\,}
\end{array}$
3 $\begin{array}{*{20}{c}}
{{H_2}C = C - CH = C{H_2}}\\
{\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{C{H_3}\,\,\,\,\,\,\,}
\end{array}$
4 \((-CH_2-CH_2-)_n\)
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POLYMERS

19615 When melamine and formaldehyde polymerise, a resin intermediate is formed. Identify  the structure of this intermediate :-

1 818-a490
2 818-b490
3 818-c490
4 818-d490
POLYMERS

19699 Natural fiber is

1 Bakelite
2 Cellulose
3 Rubber
4 Nylon \(-6\)
POLYMERS

19700 Which of the following is incorrectly matched

1 Nylon \(-6\)      :      Caprolactum
2 \(PHBV\)      :      Biodegradable polymer
3 Decron      :      Fibre
4 Low density polyethene\((LDPE)\)      :      Ziegler-Natta catalyst
POLYMERS

19701 Structure of monomer unit of natural rubber is

1 $\begin{array}{*{20}{c}}
{Cl\,\,\,\,\,\,\,\,\,\,\,\,}\\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{{H_2}C = C - CH = C{H_2}}
\end{array}$
2 $\begin{array}{*{20}{c}}
{{H_2}C = C - CH = C{H_2}}\\
{\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{{C_6}{H_5}\,\,\,\,\,}
\end{array}$
3 $\begin{array}{*{20}{c}}
{{H_2}C = C - CH = C{H_2}}\\
{\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{C{H_3}\,\,\,\,\,\,\,}
\end{array}$
4 \((-CH_2-CH_2-)_n\)
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