Aforwarded double effect evaporator is required to concentrate an orange com from o to 60% using steam at 170 kn/m (gauge) the food anters at 1 000 kahe at 303 and the forst effect is operated at 95 kn/m (gauge) additional information 1 cp is taken to be 4 18 kj/kg k 2 boiling point nise can be neglected 3 vi=v₂ 4 the overall heat transfer coefficients are as follows first effects 25 kw/m²k second effect= 25 kw/m²k 41 draw a diagram of this process, showing all streams and define the applicable operating conditions for each effect 4 2 calculate the required steam consumption (10) 43 calculate the steam economy (2) 44 determine the temperature and pressure in the second effect if the areas of each effect are equal

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

answer: - first one is the correct answer. .

explanations: - potassium sulfide is and cobalt(ii) chloride is .

charge on k is +1, charge on s is -2, charge on co is +2 and charge on cl is -1.

in a double replacement reaction the ion exchange takes place. in general the reaction looks like:

if one of the product is insoluble as per solubility rules then a precipitate of it is formed.

when we mix the aqueous solutions of potassium sulfide and cobalt(ii) chloride then chloride ion goes with potassium ion and sulfide ion goes with cobalt ion and the balanced equation is written as:

k and cl has equal charges, similarly co and s has equal charges and hence no subscripts are used for the product side.

as per the solubility rules, cos is insoluble and so it's precipitate is formed.

looking at the given choices, first choice is correct.