Related Questions

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
If water smells bad, then that odour can be removed by adding
A alum
B bleach
C activated carbon
D deactivated nitrogen
কোনো প্রকার কুঋণ সমন্বয় করার পূর্বে দেনাদারের পরিমাণ হচ্ছে ২০,৫০০ টাকা। কুঋণ ৫০০ টাকা, কুঋণ সঞ্চিতি ৫৫০ টাকা। দেনাদারের উপর ১০% কুঋণ সঞ্চিতি এবং ৫% বাট্টা সঞ্চিতি ধার্য করা হয়। বাট্টা সঞ্চিতির পরিমাণ কত? (The debtors balance appears at Tk. 20,500 prior to bad debt adjustment. Bad debt expense in Tk.500 and bad debt reserve is Tk. 550. A provision is created for bad debt is 10% and is made for a discount of 5%. What will be reserve for discount in taka?)
A Tk. 2000
B Tk. 2100
C Tk. 950
D Tk. 900
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
Bad odour in sanitary latrines is reduced by periodically sprinkling
A Bleaching powder
B Lime powder
C Aluminium sulphate
D None of these
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
choose a word or phrase that would best keep the meaning of the underlined word : 'A balanced diet should include fish and "foul " as well as fed meat
A fruit
B birds
C vegetables
D cheese and milk
The type of water filter normally employed/ preferred for treating small quantities of water in railway stations and individual industries is the __________ filter.
A Rapid sand
B Pressure
C Gravity
D Slow sand
The present.........area is a far cry from the dirty, foul smelling landfill that it was a decade ago.
A complete
B beautiful
C quiet
D lush
Before discharging the foul sewage into rivers, it is generally treated by
A Screening
B Sedimentation
C Oxidation
D All the above

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