National Express reports the following costs and expenses in June 2017 for its delivery service.
Determine the total amount of (a) delivery service (product) costs and (b) period costs.
Indirect materials$7,100Drivers’ salaries$16,300Depreciation on delivery
equipment11,900Advertising5,500Dispatcher’s salary5,810Delivery equipment
repairs310Property taxes on office building950Office supplies700CEO’s salary12,100Office
utilities1,100Gas and oil for delivery trucks2,700Repairs on office equipment210
Solution
a) Delivery service (product) costs:
b) Period costs:Indirect materials$7,100Depreciation on delivery
equipment$11,900Dispatcher\'s salary$5,810Gas and oil for delivery trucks$2,700Drivers\'
salaries$16,300Delivery equipment repairs $310Total$44,120.
UGC NET Paper 1 Mathematical Reasoning & Aptitude.pdf
Part A 1. Solid product forms during the addition of the bleach solu.pdf
1. Part A: 1. Solid product forms during the addition of the bleach solution. Why does the camphor
precipitate out of solution as it forms? 2. After washing with aqueous sodium bicarbonate, a
student carefully separated the two layers and added 5% sodium bisulfite solution to the organic
layer. She noticed that only one layer was seen during this second wash. What happened? 3. A
student dried the solution containing the product using sodium sulfate. He then evaporated off
the methylene chloride without first decanting the solution off of the Na2SO4. What will this do
to the percent yield of the reaction?
Solution
1. Conversion of borneol to camphor is an example for Jone’s oxidation. The oxidizing agent
bleach (sodium hypochloride) converts secondary alcohol (borneol) to ketone (camphor). Jones’s
reaction occurs in acidic aqueous media and camphor precipitate out of solution as it forms. The
reason for precipitation of camphor is that it is insoluble in water. Water is polar and camphor is
a nonpolar hydrocarbon. According to “like dissolves like” rule only polar solutes dissolve in
polar solvents.
2. Sodium bisulphate will react with ketones and aldehydes to form addition product. That is
why she couldn’t separate the layer.
3. Yield is calculated from weight of pure and dried product. In this case yield of the reaction
will be higher than the actual yield. Since the final compound contains sodium sulphate also. She
has to remove sodium sulphate completely to get the actual yield of the reaction.