Chemistry Entrance Exam of 2017 Questions with Answers Full Tutorial in Afan Oromo

#subscribe #aliyi_science_tube #chemistry #Chemistry Entrance Exam of 2017 Questions with Answers Full Tutorial in Afan Oromo #Chemistry_Entrance_Exam_Questions_with_Answers #Which illustrates the hybridization of orbitals of Be in the molecule BeCl₂? #Law of conservation of mass #Law of relative composition #Law of definite composition #Law of multiple proportions #A student added boiling chips into a beaker of water while carrying out an activity to determine the boiling point of water. Why do you think the boiling chips are necessary? #If the rate of diffusion of a certain unknown gas is half the rate of diffusion of helium, what will be the molar mass of the unknown gas? (Atomic mass of He = = 4.0 g/mole) #Induced dipole forces #Ion-dipole forces #Dipole-Dipole forces #Hydrogen bonding #What is the cause of the unusually high boiling points of HF, H₂O, and NH₃? #Consider the molecular structure of COCl₂, shown as phosgene: What are the predicted bond angles Cl-C-O and Cl-C-Cl? #Scandium (Sc) has the electron configuration [Ar] 4s²3d¹. To which group of elements does it belong? #Transition elements #Representative elements #Nonmetals #Inner transition elements #lanthanides #actinides #What is a Lewis base? It is #Which of the following statements CORRECTLY describes the relationship among wavelength, frequency, and speed in an electromagnetic radiation? #During laboratory class, a student placed clean water in a beaker and added pieces of calcium metal using tongs. After the reaction is completed, he/she tests the solution using red litmus paper. Which of the following will be observed? #Solutions can be classified based upon their pH values. What is a solution whose pH value is 13? #Acidic solution #Amphoteric solution #Basic solution #Neutral solution #What is the name given to an acid that dissociates (ionizes) only to a slight extent in aqueous solution? #Faraday’s second law #Faraday’s first law of electrolysis?