Chemical Engineering Mcqs

Soap cannot be used with hard water, because _________________?

(A) Hard water contains sulphate
(B) They form insoluble calcium soaps which precipitate
(C) They attract back the removed dirt
(D) None of these

Submitted By :Ali Uppal

The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about ________________ cm2/gm?

(A) 800
(B) 1600
(C) 4000
(D) 8500

Submitted By :Ali Uppal

Phenolic antiseptics are added in the __________________ soap?

(A) Shaving
(B) Medicated
(C) Metallic
(D) Transparent

Submitted By :Ali Uppal

Baking soda is chemically represented by__________________?

(A) Na2CO3
(B) NaHCO3
(C) Na2CO3.H2O
(D) Na2CO3.10H2O

Submitted By :Ali Uppal

20% oleum means that in 100 kg oleum, there are 20 kg of_____________________?

(A) SO3 and 80kg of H2SO4
(B) H2SO4 and 80kg of SO3
(C) SO3 for each 100 kg of H2SO4
(D) None of these

Submitted By :Ali Uppal

Penicillin is made employing _______________ fermentation process?

(A) Continuous
(B) Aerobic batch
(C) Anaerobic batch
(D) None of these

Submitted By :Ali Uppal

Fermentation is adversely affected by the____________________?

(A) Presence of air
(B) Absence of air
(C) High concentration
(D) Presence of ammonium salts

Submitted By :Ali Uppal

In the Solvay process, the product from the calciner is___________________?

(A) Light soda ash
(B) Dense soda ash
(C) Sodium bicarbonate
(D) Dehydrated soda ash

Submitted By :Ali Uppal

Naphthols are derivatives of________________?

(A) Methyl amine
(B) Naphthalene
(C) Phenol
(D) Xylene

Submitted By :Ali Uppal

Which one of the following is not an elastomer ?

(A) Polyisoprene
(B) Neoprene
(C) Nitrile-butadiene
(D) None of these

Submitted By :Ali Uppal

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