Related Questions

Bohr মডেল অনুযায়ী হাইড্রোজেন পরমাণুর স্থায়ী কক্ষপথের একটি থেকে সন্নিহিত অপর কক্ষপথে ইলেকট্রন স্থানান্তরিত হলে কৌণিক ভরবেগের পরিবর্তন কত Js?
A 1.05×10-34
B  6.63×10-34
C      2.1×10-34
D  1.6×10-19 
1 Bohr ম্যাগনেটনের মান কত?
A 9.27×10-24 Am2
B 9.27×1024 Am2
C 9.27×10-24 A2m2
Who modified Bohr's theory by introducing elliptical orbits for electron path?
A Hund
B Thomson
C Rutherford
D Sommerfeld
বোরের স্বীকার্য অনুসারে হাইড্রোজেন পরমাণুর প্রথম কক্ষপথে ইলেকট্রনের কৌণিক ভরবেগ (According to Bohr's hypothesis, the angular momentum of electron in the 1st orbit of hydrogen atom is)
A h/2
B h/π
C h/2π
D h/4π
For the same heat transfer area and the terminal conditions, the ratio of the capacities of a single effect evaporator to a triple effect evaporator is
A 3
B 0.33
C 1
D 1.33
A multiple effect evaporator as compared to a single effect evaporator of the same capacity has
A Lower heat transfer area
B Lower steam economy
C Higher steam economy
D Higher solute concentration in the product
In a multiple effect evaporator, the effect of boiling point elevation is to
A Reduce the capacity
B Reduce the economy
C Increase the economy
D None of these
The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the
A Catalytic conversion
B Green house effect
C Global warming
D Both B and C
In a multiple effect evaporator system having 'n' effects, the amount of water evaporated per unit surface area in approximately equal to __________ times that in a single effect.
A nth
B $${\left( {\frac{1}{{\text{n}}}} \right)^{{\text{th}}}}$$
C 0.5 nth
D 1.5 nth
Anything 'Pernicious' tends to injure or destroy. Something which has no such harmful effect is-
A innocuous
B innocent
C immaculate
D salutary

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