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Chemical Engineering - Chemical Process

Exercise : Chemical Process - Section 11
21.
Nylon-6 as compared to Nylon-66 is having higher
hardness
abrasion/resistance
melting point
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
Digestion of wood-base materials (for manufacture of pulp) is done to
remove lignin.
produce long fibres.
prevent deterioration on storage.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
Soap cannot be used with hard water, because
hard water contains sulphate.
they form insoluble calcium soaps which precipitate.
they attract back the removed dirt.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
Which of the following is not an antibiotic ?
Penicillin
Streptomycin
Tetracyclin
Quinine
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
The most reactive allotropic form of phosphorus is __________ phosphorus.
red
yellow
violet
black
Answer: Option
Explanation:
White phosphorus, also known as yellow phosphorus, is the most reactive allotropic form of phosphorus. It is a highly reactive, waxy, white or yellowish substance that can ignite spontaneously in air. White phosphorus is the least stable among the different forms of phosphorus and can easily undergo chemical reactions with other substances. Due to its reactivity, it is used in many industrial applications, such as in the production of fertilizers, pesticides, semiconductors, flame retardants, and as a reducing agent in metallurgy. However, it is also toxic and can cause severe burns if it comes into contact with skin.
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