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Carry over in steam boiler: The phenomenon of carrying of water along with impurities by steam is called "carry over". This is mainly due to priming and foaming. Priming and foaming mainly occur together. They are objectionable together:
1. Dissolved salts or suspended solids in water carried by the wet steam to super heater and turbine, blades, where they get deposited as water deposited. This deposit decreases the efficiency of boiler.
2. Dissolved salts may enter the parts of other machinery, thereby decreasing their life.
3. The maintenance of the boiler pressure becomes difficult because of improper judgement of actual height.
the reaction of ammonium chloride with sulphuric acid
For the dissociation equilibrium of formic acid, HCO 2 H(aq) ↔ H + (aq) + HCO 2 - (aq), the acid dissociation constant at 298.15K has the value K a = 1.77 *10 -4 . (a) Find t
What is the effect of more electronegative atom on the strength of ionic bond: (1) Decreases (2) Increase (3) Decreases slowly (4) Remains the same Ans: Increase
Halides Transition metals react with halogens at high temperatures to form halides. These reactions have very high activation energies; therefore, high temperatures are requ
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The fresh feed to an ammonia production process contains nitrogen (N 2 ) and hydrogen (H 2 ) in stoichiometric proportion, along with an inert gas (I). The feed is combined with
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formaldehyde 10 N preparation?
The number of electrons and neutrons of an element is 18 and 20 respectively. Its mass number is: (1) 17 (2) 37 (3)2 (4)38 Ans: 17
In the addition of the hydrogen, halide to unsaturated alkenes in the presence of peroxides the halide adds to the carbon atom correlated to more number of hydrogen atoms and hydro
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