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Kerala PSC Examination Expected Questions - 375 (CHEMISTRY)

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346. The element used for radiographic imaging:

(b) Strontium
(c) Barium
(d) Beryllium

Answer:- Barium

347. An anti-oxidant often added to fat containing foods to prevent rancidity:

(a)Ethyl benzoate
(b) Methylated chlorobenzene
(c) Butyrated hydroxi anisole
(d) Propyl alcohol

Answer:- Butyrated hydroxi anisole

348. Which of the following insoluble in water?

(a)Silver Chloride
(b) Calcium Chloride
(c) Sodium Nitrate
(d) Magnisium Sulphate

Answer:- Silver Chloride

349. An example of mineral acid:

(a)Citric acid
(b) Formic acid
(c) Tartaric acid
(d) Hydrochloric acid

Answer:- Hydrochloric acid

350. The most abundant type of coal:

(b) Anthrasite
(c) Lignite
(d) None of these

Answer:- Bituminous

351. The process used in dairies to separate cream from milk is:

(b) Sedimentation
(c) Filtration
(d) Sublimation

Answer:- Centrifugation

352. Which of the following is not present in pure sugar?

(b) Hydrogen
(c) Oxygen
(d) Nitrogen

Answer:- Nitrogen

353. Phosphorus finds important use in _____ industry.

(b) Fertilizer
(c) Paper
(d) Sugar

Answer:- Fertilizer

354. Radio Carbon dating was discovered by:

(a)Willard Franck Libby
(b) Madam Curie
(c) Henri Bequerel
(d) Pierrie Curie

Answer:- Willard Franck Libby

355. Development of unpleasant smell and taste in oil and fat containing food items due to oxidation of atmospheric oxygen is called:

(a)Radio activity
(b) Turbidity
(c) Acidity
(d) Rancidity

Answer:- Rancidity

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