30 Questions
What is the primary function of zinc oxide in talcum powder?
To mask enlarged pores and minor blemishes
What is the role of BHT in creams?
To produce a more active synergistic effect
What is the primary function of sodium benzoate in food preservation?
To prevent spoilage of food due to microbial growth
What is the primary function of antioxidants in food preservation?
To retard the action of oxygen on food
What type of creams are used to save the skin from sunburn in summer?
Sunburn creams
What is the purpose of adding chalk to talcum powder?
To absorb secretion without showing any evidence
What is the role of zinc stearate in baby talcum powders?
To make powder adhere to skin
Which of the following is NOT a function of food additives?
Providing nutritional value
What is the purpose of phenolic antibacterials in deodorants?
To prevent the growth of bacteria
What is the role of fortifying agents in food?
To provide nutritional value
What is the primary function of BHT and BHA in food preservation?
To extend shelf life by preventing oxidation
What is the role of a fixative in perfumery?
To equalize the rate of evaporation of odouriferous components
What is the primary function of talcum powder?
To reduce irritation of the skin
What is the vehicle in a perfume composition?
The ethanol and water mixture
What type of substances are used to impart odour to a perfume?
Both natural and synthetic substances
What is the function of thymol, a naturally occurring phenol derivative?
As a powerful disinfectant
What was discovered by Alexander Fleming in 1929 from the mould penicillium notatum?
Penicillin
What is the purpose of antiseptic dyes in the treatment of infectious diseases?
To treat infectious diseases
What is the mode of action of penicillin as an antibiotic?
It inhibits the synthesis of the bacterial cell wall
What is the advantage of using antibiotics like penicillin in medical practice?
They are effective against a large number of bacterial infections
What is the characteristic structural unit found in tetracyclines?
Hydronaphthacene skeleton
What is the primary use of chloramphenicol in medicine?
Treatment of typhoid fever and related diseases
What is the effect of high concentrations of chloramphenicol on animal and plant cells?
It inhibits their growth
What is the role of antihistamines in the body?
To diminish or abolish the main actions of histamine
What is the specific condition where chloramphenicol is very effective in its treatment?
All of the above
What type of antimicrobial substance is sulphanilamides structurally analogous to?
p-amino benzoic acid
What is the primary function of chloroxylenol in Dettol?
Antiseptic and disinfectant properties
What is the concentration of chlorine used to make water fit for drinking?
0.2 to 0.4 ppm
What is the purpose of adding bithional to medicated soaps?
To reduce the odour produced by bacterial decomposition of organic matter on the skin
What is the typical concentration of iodine in a tincture of iodine?
2-3% iodine solution of alcohol-water
This quiz covers the basics of antioxidants BHT and BHA, their use in increasing food storage life, and the composition of perfumes, including their requirements and ingredients.
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