325071
The mass average molecular mass and number average molecular mass of a polymer are, respectively, 40,000 and 30,000. The polydispersity index of polymer will be :
1 \( < 1\)
2 \(>1\)
3 1
4 0
Explanation:
Average number molecular weight \(\overline{\mathrm{M}}_{\mathrm{n}}=30,000\)Average mass molecular weight \(\overline{\mathrm{M}}_{\mathrm{w}}=40,000\) Polydispersity index (PDI)=\(\frac{{{{\overline {\text{M}} }_{\text{W}}}}}{{{{\text{M}}_{\text{n}}}}}{\text{ = }}\frac{{{\text{40,000}}}}{{{\text{30,000}}}}{\text{ = 1}}{\text{.33}}{\text{.}}\)
CHXII15:POLYMERS
325072
A sample of polymer contains 100 molecules of molecular mass \(10^{2}\); each 200 molecules have \(10^{3}\) each; and 400 molecules have \(10^{4}\) each. The number average molecular mass value is Calculate the weight average molecular mass.
325073
In a polymer sample \(30 \%\) of molecules have a molecular mass of \(20,000,40 \%\) have 30,000 and the rest 60,000 . What is the weight average molecular mass of the polymer?
1 43,333
2 30,600
3 50,400
4 40,300
Explanation:
Mass average molecular mass \(\frac{{[30{{(20000)}^{_{^2}}}] + [(40){{(30000)}^2}] + [(30){{(60000)}^2}]}}{{100}}\) =43,333
CHXII15:POLYMERS
325074
In a polymer sample \(20 \%\) of molecules have a molecular mass 10,000, 50% have 40,000 and the rest 20,000 . What is the weight average molecular mass of the polymer?
325071
The mass average molecular mass and number average molecular mass of a polymer are, respectively, 40,000 and 30,000. The polydispersity index of polymer will be :
1 \( < 1\)
2 \(>1\)
3 1
4 0
Explanation:
Average number molecular weight \(\overline{\mathrm{M}}_{\mathrm{n}}=30,000\)Average mass molecular weight \(\overline{\mathrm{M}}_{\mathrm{w}}=40,000\) Polydispersity index (PDI)=\(\frac{{{{\overline {\text{M}} }_{\text{W}}}}}{{{{\text{M}}_{\text{n}}}}}{\text{ = }}\frac{{{\text{40,000}}}}{{{\text{30,000}}}}{\text{ = 1}}{\text{.33}}{\text{.}}\)
CHXII15:POLYMERS
325072
A sample of polymer contains 100 molecules of molecular mass \(10^{2}\); each 200 molecules have \(10^{3}\) each; and 400 molecules have \(10^{4}\) each. The number average molecular mass value is Calculate the weight average molecular mass.
325073
In a polymer sample \(30 \%\) of molecules have a molecular mass of \(20,000,40 \%\) have 30,000 and the rest 60,000 . What is the weight average molecular mass of the polymer?
1 43,333
2 30,600
3 50,400
4 40,300
Explanation:
Mass average molecular mass \(\frac{{[30{{(20000)}^{_{^2}}}] + [(40){{(30000)}^2}] + [(30){{(60000)}^2}]}}{{100}}\) =43,333
CHXII15:POLYMERS
325074
In a polymer sample \(20 \%\) of molecules have a molecular mass 10,000, 50% have 40,000 and the rest 20,000 . What is the weight average molecular mass of the polymer?
325071
The mass average molecular mass and number average molecular mass of a polymer are, respectively, 40,000 and 30,000. The polydispersity index of polymer will be :
1 \( < 1\)
2 \(>1\)
3 1
4 0
Explanation:
Average number molecular weight \(\overline{\mathrm{M}}_{\mathrm{n}}=30,000\)Average mass molecular weight \(\overline{\mathrm{M}}_{\mathrm{w}}=40,000\) Polydispersity index (PDI)=\(\frac{{{{\overline {\text{M}} }_{\text{W}}}}}{{{{\text{M}}_{\text{n}}}}}{\text{ = }}\frac{{{\text{40,000}}}}{{{\text{30,000}}}}{\text{ = 1}}{\text{.33}}{\text{.}}\)
CHXII15:POLYMERS
325072
A sample of polymer contains 100 molecules of molecular mass \(10^{2}\); each 200 molecules have \(10^{3}\) each; and 400 molecules have \(10^{4}\) each. The number average molecular mass value is Calculate the weight average molecular mass.
325073
In a polymer sample \(30 \%\) of molecules have a molecular mass of \(20,000,40 \%\) have 30,000 and the rest 60,000 . What is the weight average molecular mass of the polymer?
1 43,333
2 30,600
3 50,400
4 40,300
Explanation:
Mass average molecular mass \(\frac{{[30{{(20000)}^{_{^2}}}] + [(40){{(30000)}^2}] + [(30){{(60000)}^2}]}}{{100}}\) =43,333
CHXII15:POLYMERS
325074
In a polymer sample \(20 \%\) of molecules have a molecular mass 10,000, 50% have 40,000 and the rest 20,000 . What is the weight average molecular mass of the polymer?
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
CHXII15:POLYMERS
325071
The mass average molecular mass and number average molecular mass of a polymer are, respectively, 40,000 and 30,000. The polydispersity index of polymer will be :
1 \( < 1\)
2 \(>1\)
3 1
4 0
Explanation:
Average number molecular weight \(\overline{\mathrm{M}}_{\mathrm{n}}=30,000\)Average mass molecular weight \(\overline{\mathrm{M}}_{\mathrm{w}}=40,000\) Polydispersity index (PDI)=\(\frac{{{{\overline {\text{M}} }_{\text{W}}}}}{{{{\text{M}}_{\text{n}}}}}{\text{ = }}\frac{{{\text{40,000}}}}{{{\text{30,000}}}}{\text{ = 1}}{\text{.33}}{\text{.}}\)
CHXII15:POLYMERS
325072
A sample of polymer contains 100 molecules of molecular mass \(10^{2}\); each 200 molecules have \(10^{3}\) each; and 400 molecules have \(10^{4}\) each. The number average molecular mass value is Calculate the weight average molecular mass.
325073
In a polymer sample \(30 \%\) of molecules have a molecular mass of \(20,000,40 \%\) have 30,000 and the rest 60,000 . What is the weight average molecular mass of the polymer?
1 43,333
2 30,600
3 50,400
4 40,300
Explanation:
Mass average molecular mass \(\frac{{[30{{(20000)}^{_{^2}}}] + [(40){{(30000)}^2}] + [(30){{(60000)}^2}]}}{{100}}\) =43,333
CHXII15:POLYMERS
325074
In a polymer sample \(20 \%\) of molecules have a molecular mass 10,000, 50% have 40,000 and the rest 20,000 . What is the weight average molecular mass of the polymer?
