Which out of the following does not help in disinfecting water?

ক Filtration
খ Chlorine Tablets
গ Alums
ঘ Boiling

সঠিক উত্তর: Filtration

The correct answer is Filtration. Filtration is a process used to separate solids from liquids or gases by using a filter medium that allows fluid to pass through but not solid. Filtration can be mechanical-biological or physical. It does not help in disinfecting water.
Bissoy MCQ

Related Questions

Which of the following is used for disinfecting drinking water?
ক Baking powder
খ Bleaching powder
গ Washing soda
ঘ Baking soda
একটি পানিপূর্ণ কুয়ার গভীরতা 20m ও ব্যাস 2 m. কুয়াটিকে পানি শূণ্য করার জন্য 5 HP এর একটি পাম্প লাগানো হল। অর্ধেক পানি তোলার পর পাম্পটি নষ্ট হয়ে গেল। বাকি পানি তোলার জন্য একই ক্ষমতা সম্পন্ন আর একটি পাম্প লাগানো হল। প্রথম পাম্প দ্বারা সম্পাদিত কাজের পরিমান নির্ণয় কর।(The depth and diameter of a water filled well are 20 m and 2 m respectively. An engine of 5 HP is attached to pump out the water. The pump was ruined after emptying half of the water. Then another pump of same capacity was attached to pump out rest of the water. Determine the work done by first pump.) 
ক 2.54 × 104 J
খ 1.44 × 104 J
গ 2.34×104 J
ঘ 1.54 × 104 J
ঙ 1.54 ×104 J
A sink contains exactly 12 liters of water. If water is drained from the sink until it holds exactly 6 liters of water less than the quantity of water drained away, how many liters of water were drained away ?
ক 2
খ 3
গ 9
ঘ 6
A,B,C,D,E,G and I are seven friends who study in three different standards namely 5th, 6th and 7th such that not less than two friends study in the same standard. Each friend also has a different favorite subject namely History, Civics, English, Bangla, Science , Maths , and Economics but not necessarily in the same order. A likes Maths and studies in the 5th standard with only one other friend who likes Bangla. I studies with tow other friends . Both the friends who study with I like languages (Here languages include only Science , English and Bangla ) . D studies in the 6th standard with only one person and does not like Civics . E studies with only one friend . The one who likes history does not study in 5th or 6th standard . E does not like languages. C does not like English , Science or Civics. Which combination represents E's favorite subject and the standard in which he studies?
ক Civics and 7th
খ Economics and 5th
গ Civics and 6th
ঘ History and 7th
A teacher can help adolescent to overcome his special problems, and help him to adjust to the environment. Which of the following attitude, he should not made?
ক He should impart right information about sex
খ He should redirect the energies of the adolescent to fruitful channels through sports and other constructive activities
গ He should have unsympathetic attitude towards others
ঘ He should have right information about sex
Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
ক Neutralised by alkali treatment
খ Left as such without any treatment
গ Diluted with fresh water to reduce its acidity
ঘ None of these
Choose the simple form of the sentence- "If you help me, I will help you"
ক By your help I will help you
খ Despite your help I will help you
গ In case of your helping me I will help you
ঘ In case of your help me I will help you
"Help!""Help!",shouted the boy.(Indirect)
ক The boy shouted help, help.
খ The boy told others to help.
গ The boy shouted for help.
ঘ The boy told others shouting to help.
"Help! help!", shouted the boy. (Indirect)
ক The boy shouted help, help.
খ The boy told others to help.
গ The boy shouted for help
ঘ The boy told others shouting to help.
"Help! Help!", should the boy. (Indirect)
ক The boy should help, help
খ The boy told others to help.
গ The boy shouted for help
ঘ The boy told others shouting to help

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