Related Questions

When we cut an onion, the vegetable emits an odour and our eyes tear up. Which of the following compounds is responsible for the tears and odour resulting from freshly cut onions?
A Ascorbic acid
B Sulphuric acid
C Citric acid
D Acetic acid
A 25 ml sample was diluted to 250ml with odourless distilled water so that the odour of the sample no longer perceivable. What was the Threshold odour number?
A 11
B 10
C 25
D 05
Can you smell gas? The underlined is ______
A noun
B adjective
C verb
D adverb
If water smells bad, then that odour can be removed by adding
A alum
B bleach
C activated carbon
D deactivated nitrogen
When a bottle of scent is kept open in a corner of a room its odour is felt in all parts of the room. This is due to the phenomenon of :
A Evaporation
B Vaporisation
C Diffusion
D Sublimation
Bad odour in sanitary latrines is reduced by periodically sprinkling
A Bleaching powder
B Lime powder
C Aluminium sulphate
D None of these
Which of the following pollutants, if present in atmosphere is detectable by its odour?
A CO
B SO2
C NO2
D CO2
Foul odour and bad taste of water is removed by treating with
A Alum
B Bleaching powder
C Activated carbon
D Copper sulphate
Ethyl mercaptan is added to the Doctor negative LPG for facilitating the detection of its leakage (by bad odour) to the extent of about __________ ppm.
A 1
B 50
C 5000
D 10000
There are four words below the Sentence with an underlined word. choose the word which would best keep the meaning of the original sentence if it were substituted for the underlined word: A middle aged woman of tremendous girth sat down beside the other patients in the waiting room .
A prestige
B rotundity
C eloquence
D mirth

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