Which of the following is an example of the activity of a catalyst- A-.docx

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Which of the following is an example of the activity of a catalyst? A.Molecular oxygen is consumed during the combustion of wood. B. Nickel-plating accelerates the hydrogenation of vegetable oils. C.A glass beaker contains a solution of rapidly precipitating BaSO 4 (s). D.A photon is absorbed in the initial step of oxygenic photosynthesis. Solution example of the activity of a catalyst? B. Nickel-plating accelerates the hydrogenation of vegetable oils. explanation : Hydrogenation of vegetable oil in presence Nickel is the best example for catalytic activity. .

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Which of the following is likely to contradict Samuel Huntington\'s idea that Mexican migrants to the US may not have an \"Americano dream?\" a. Mexican-American consumption pattern is not too different from the consumption pattern of rest of America. b. Mexican immigrants who come from Mexican villages take longer to assimilate, but the educated Mexican immigrants assimilate readily. c. Latinos are quite adept at climbing out of poverty. Sixty-eight percent of those who have been in this country 30 years, own their own homes. d. A large number of Mexican-Americans join the US Army. e. All of the above Solution e. All of the abovee. All of the above .

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Which of the following is an effective method of preventing computer viruses from spreading? A. Require root/administrator access to run programs. B. Enable scanning of e-mail attachments. C. Prevent the execution of .vbs files. D. Install a host based IDS (Intrusion Detection System) Solution D. Install a host based IDS (Intrusion Detection System) Dictionaries may be used in a cracking program to determine passwords. A short dictionary attack involves trying a list of hundreds or thousands of words that are frequently chosen as passwords against several systems. Although most systems resist such attacks, some do not. In one case, one system in five yielded to a particular dictionary attack. Incorrect answers: .

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which of the following elements would you expect to form mainly covalent bonds? Oxygen, potassium, phosphorus, fluorine, hydrogen, rubidium (how do you know if an element will have a covalent or ionic bond?) Solution Ionic compound: The ionic compound which consist ionic bond. The ionic bond is a type of bond which formed between positive and negative ions or one metal and one non-metal. Covalent compound: The covalent compound which consist covalent bond. The covalent bond is a type of bond which formed by sharing of electrons between atoms. It forms between two non-metals. P and H are mainly non-metal thus they will form covalent bonds. If an element is metal then it will from ionic bond. If element is non-metal like H2, N2 then it will from covalent bond. .

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which technique allows multiple applications to share a transport connection broadcasting multiplexing encapsulation segmentation Solution Broadcasting refers to transmitting a packet that will be received by every device on the network. Multiplexing is a method by which multiple analog or digital signals are combined into one signal over a shared medium to share an expensive resource. Encapsulation is a method of designing modular communication protocols in which logically separate functions in the network are abstracted from their underlying structures by inclusion or information hiding within higher level objects. Segmentation is the process of breaking a packet into smaller units at the Transport layerÂ Â before transmission. .

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