HARD

Earn 100

In a polymer sample, the molecular weight of $10$ molecules is $20, 000$ , molecular weight of $30$ molecules is $35, 000$ and molecular weight of another $20$ molecules is $40, 000$ then calculate the number average molecular weight ( ${\bar{M}}_{n}$ ) of the polymer.

Important Questions on Polymers

MEDIUM

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

The polydispersity index of the polymer is always:

MEDIUM

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

A polymer sample is made up of

30 %

molecules of mass

20, 000, 40 %

30, 000

and the rest mass of

60, 000

. Its number average molecule mass is

HARD

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

Which option is correct for synthetic polymer?

EASY

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

What is PDI (Poly Dispersity Index)?

EASY

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

Write the formula to determine 'weight average molecular weight' of polymers.

MEDIUM

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

The Poly Dispersity Index

(PDI)

of a polymer is

1.5 .

If its number average molecular mass is

30, 000,

calculate its weight average molecular mass.

HARD

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

In a polymer sample, the molecular weight of

30

molecules is

25, 000

, molecular weight of

25

molecules is

30, 000

and molecular weight of another

40

molecules is

43, 000

then calculate the weight average molecular weight (

{\bar{M}}_{w}

) of the polymer.

HARD

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

What is polydispersity index? Explain.

EASY

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

Name the different types of molecular masses of polymers.

MEDIUM

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

The most suitable method for determination of the molecular mass of polymer is?

EASY

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

The number average molar mass and mass average molar mass of a polymer are respectively 30,000 and 40,000. The polydispersity index (PDI) of the polymer is

MEDIUM

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

The number average molecular mass

({\bar{M}}_{n})

and the weight average molecular mass

({\bar{M}}_{w})

of the synthetic polymers are related as:

EASY

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

What is the polydispersity index of polymer if the mass average molecular mass & number average molecular mass of a polymer are respectively 40,000 and 30,000?

HARD

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

Explain the method of determining the molar mass of the polymer.

HARD

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

Why molecular weight of polymers is taken as average molecular weight. How many types average molecular weight can be represented? Explain each type.

HARD

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

Explain the determination of molecular mass of polymers by number average molecular weight method.

MEDIUM

Chemistry>Organic Chemistry>Polymers>Molecular Masses of Polymers

The most suitable method for determination of the molecular mass of polymer is?