Engineering Sciences
GATE XE format:mcq PYQs
Build your understanding with focused practice from past exam papers.
Questions 251–260 of 959. Imported answers require independent review unless marked reviewed.
Question 119
Open questionXE-FMCQ2 marksNeeds review
The propagation step of a free radical copolymerization is represented by the following possible reaction steps:
P1:
, rate constant =
P2:
, rate constant =
P3:
, rate constant =
P4:
, rate constant =
where,
and
are two monomers and
and
are the active radicals of
and
, respectively.
(
) represents the rate constant of each step as shown above.If the reactivity ratios of
and
are expressed as:
and
, respectively, and feed mole ratio,
is expressed as
(where,
and
are the concentrations of
and
, respectively), the probability of the reaction P2 is ______.Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 120
Open questionXE-FMCQ2 marksNeeds review
Match the following additives to their respective functions for poly(vinyl chloride) compounding.
Additive | Function |
|---|---|
P. Dibutyl tin maleate | 1. Lubricant |
Q. Epoxided soybean oil | 2. Extender |
R. Chlorinated paraffin wax | 3. Heat stabilizer |
S. Calcium stearate | 4. Plasticizer |
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 121
Open questionXE-FMCQ2 marksNeeds review
Match the following properties with their respective units.
Property | Unit |
|---|---|
P. Notched Izod impact strength | 1. Pa s |
Q. Flexural strength | 2. J m |
R. Dielectric strength | 3. MPa |
S. Complex viscosity | 4. kV cm |
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 132
Open questionXE-GMCQ1 markNeeds review
Which one of the following fungi produces aflatoxins?
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 133
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Under standard conditions in animal feeding studies, the weight gained (in grams) per gram of protein consumed by an animal is termed as
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 134
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Xerophthalmia is caused due to the deficiency of
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 135
Open questionXE-GMCQ1 markNeeds review
Which one of the following steps is used to remove phosphatides from crude oil in the refining process?
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 136
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The unique flavor of chocolate and cocoa is due to the formation of
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 137
Open questionXE-GMCQ1 markNeeds review
Which one of the following statements regarding Hazard Analysis Critical Control Point (HACCP) plan is NOT correct?
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 138
Open questionXE-GMCQ1 markNeeds review
The product of cabbage fermentation by Leuconostoc mesenteroides is
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