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What is the heat of reaction for C2H4 + 3O2 -> 2CO2 + 2H2O, if heat of formation of C2H4, O2, CO2, and H2O are 10 J, 5 J, 6 J and 2 J respectively?
C2H4, C2H2 ও C2H4 যৌগগুলোতে C - C বন্ধন দৈর্ঘ্য যথাক্রমে X, Y ও Z হলে-
For the reaction, A = X + Y, the respective concentrations are CA, CX and CY. The forward reaction rate constant is kf and the backward reaction rate constant is kb. Choose the correct statement from the following:
P. At equilibrium, kf CA > kB CxCy
Q. If the reaction is irreversible than, kb CXCY = 0
R. The backward reaction rate will essentially be first order, if the forward reaction rate is first order.
S. Activation energy for the first order forward reaction will be independent of temperature.
In the reaction,
Basics of Organic Reaction Mechanism mcq question image
the major product X is
The major product of the following reaction is
Basics of Organic Reaction Mechanism mcq question image
Two stores A and B bought the same product from the company at the same price. Store A marked the price of the product 50% above its cost price and offered two successive discounts of 15% and 10% on the marked price of the product, while store B marked the price of the product 60% above its cost price and offered two successive discounts of 15% and 12% on the marked price of the product. If a customer buys the product from store B, he has to pay Rs. 986 more than that at store A. At what price the two stores bought the product from the company?
Which of the following statement (s) is/are true about the following eliminations? (1) Hoffmann product is major product in I (2) Saytzeff product is major product in I (3) Hoffmann product is major product in II (4) Saytzeffproduct is major product in II
The reaction between ethylene and hydrogen bromide to form ethyl bromide is carried out in a continuous reactor. C2H4 + HBr = C2H5Br The product stream is analyzed and found to contain 51.7 mole% C2H5Br and 17.3% HBr. The feed to the reactor contains only ethylene and hydrogen bromide. Calculate the fractional conversion of the limiting reactant and the percentage by which the other reactant is in excess. If the molar flow rate of the feed stream is 165 mol/s, what is the extent of reaction?
The major product P of the given reaction is
Basics of Organic Reaction Mechanism mcq question image
Given below are three quantities named A, B and C. Based on the given information, determine the relation among the three quantities. A shopkeeper bought two products X and Y from a company. He bought product X for Rs. 3060 and sold it to the customer earning a profit of 20%, while he sold the product Y to a customer for Rs. 4160, thereby earning a profit of 30%. Quantity A: If the company earned a profit of 20% on the product X, what is the manufacturing cost of product X? Quantity B: If the company earned a profit of Rs. 600 on the product Y, what is the manufacturing cost of product Y? Quantity C: What is the difference between the total price paid by the customers and the total manufacturing cost of the products X and Y?