Chemical Engineering - Chemical Engineering Basics

1. 

Safety matches is produced using

A. red phosphorus
B. yellow phosphorus
C. black phosphorus
D. elemental sulphur

Answer: Option A

Explanation:

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2. 

Calorific value of __________ are almost same.

A. lignite & anthracite coal
B. lignite & coal gas
C. petrol & diesel
D. coal gas & natural gas

Answer: Option C

Explanation:

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3. 

Which of the following pairs is not correctly matched ?

A. Uranium - 233 : Fertile material.
B. Bindingenergy : Mass defect.
C. Scattering: Absorption cross-section.
D. Number of nucleons : Mass number.

Answer: Option A

Explanation:

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4. 

Commonly used flux for brazing is

A. zinc chloride
B. borax
C. ammonium chloride
D. rosin

Answer: Option B

Explanation:

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5. 

Iron has got __________ isotopes.

A. no
B. four
C. three
D. two

Answer: Option B

Explanation:

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