Consider following data for bulk polymerization, with benzoyl peroxide as initiator. = 6 mol/m3 = 6.56*103 mol/m3 kp2/kt = 1.5*10-6 m3/ mol-s What is the initiator efficiency if initial rate of polymerization is 0.0256 m3/ mol-s benzoyl peroxide decomposes at a rate of 3.2* 10-6 m3/ mol-s-1?

The data for bulk chain polymerization having potassium persulfate as initiator is given- = 5 mol/m3 = 5.3*103 mol/m3 kp2/kt = 0.85*10-6 m3/ mol-s What is the initial rate of polymerization, if potassium persulfate decomposes at a rate of 2.2*10-6 m3 s/ mol?

A

= 5 mol/m3 = 5.3*103 mol/m3 kp2/kt = 0.85*10-6 m3/ mol-s What is the initial rate of polymerization, if potassium persulfate decomposes at a rate of 2.2*10-6 m3 s/ mol? ] 0.012

B

I

C

I

D

I

Hydrogen peroxide decomposes according to the following thermochemical reaction: H2O2 (l) → H2O (l) + 1/2 O2(g); ΔH = -98.2 kJ Calculate the change in enthalpy, ΔH, when 1.00 g of hydrogen peroxide decomposes.

A

-2.89 kJ

B

-2.80 kJ

C

-2.00 kJ

D

-2.85 kJ

What is the rate chain initiation reaction for initiator efficiency of 0.8, when concentration and decomposition rate of benzoyl peroxide are 4 mol/m3 and 3.24*10-6 m3/ mol-s-1, respectively?

A

2.07*10-5

B

1.57*10-5

C

3.27*10-5

D

1.03*10-5

Conversion of Benzoyl Chloride to Benzoyl Peroxide is called which oxidative reaction?

A

Dehydrogenation

B

Direct O2 addition

C

Peroxidation

D

Combine oxidation

Consider the following graph plotted between conversion and time taken, where benzoyl peroxide is used as an initiator. Which of the following curve represents the lowest monomer concentration?

A

1

B

5

C

4

D

3

Identify the chain initiation step of the polymerisation of ethene in the presence of benzoyl peroxide initiator, from the following?

A

C6H5• + C2H4 = C6H5-CH2-CH2•

B

C6H5-CH2-CH2• + C2H4 = C6H5-CH2-CH2-CH2-CH2•

C

C6H5-CH2-CH2-CH2-CH2• = C6H5-(-CH2-CH2-)n-CH2•

D

C6H5-(-CH2-CH2-)n-CH2• + C6H5-(-CH2-CH2-)n-CH2• = C6H5-(-CH2-CH2-)n-C6H5

Which of the following statements are true?
Statement I Big data refers to no precise quantity, but generally refers to data in the range of Petabytes and Exabyte, i.e. billions to trillions of records, all from various sources. Big data is generated much faster. than traditional data in much larger quantities.
Statement II Big data interests industries because they are able to learn more patterns and curious variances than smaller data sets, with the capability to provide valuable insights into consumer behaviour, weather systems, financial market activity, or other phenomena.
Statement III Various departments and product lines use various applications within most organisations and store data in separate datasets. These separate databases may contain similar data, but data from one data base to another is not always consistent. This is called data silo.

A

Both statements I and II

B

Both statements II and III

C

Both statements I and III

D

All of the above

Fatigue effect for light and medium duty cranes need not be checked if . b) Nsc < 5×106 3 c) Nsc > 5×106 2 d) Nsc < 5×106 .

A

Nsc > 10×106 .

B

(27/γmft)/γmt

C

(27/γmft)/γmt

D

(27/γmft)/γmt

Which of the following is required for determination of initiator efficiency, when the approach involves measurement and conversion of polymer production and initiator decomposition?

A

number of polymer molecules formed

B

number of radicals produced

C

mode of termination

D

all of the mentioned

Poly vinyl chloride is produced by the free radical chain polymerisation of the vinyl chloride in presence of the benzoyl peroxide.

A

True

B

False

Consider following data for bulk polymerization, with benzoyl peroxide as initiator. = 6 mol/m3 = 6.56103 mol/m3 kp2/kt = 1.510-6 m3/ mol-s What is the initiator efficiency if initial rate of polymerization is 0.0256 m3/ mol-s benzoyl peroxide decomposes at a rate of 3.2* 10-6 m3/ mol-s-1?

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