In filling electrons into orbitals, which of these is the correct format? (A) 1s2s2p3s3d3p4s4d (B) Is 2s2p3s quad3d3p4s4p (C) 1s2s2p s 3 p 4s3d4p (D) 1s2s2p quad3s3p quad3d4s4p Provide answers to questions 21 , and 22 by considering the reaction of chlorine gas with ethane as represented in the equation: CH_(3)CH_(3)+Cl_(2)rarr"X"y+HCl , 21. What are the missing catalyst (X) and the main product of the reaction (Y) respectively? (A) Chlorine and CH_(3)CH_(2)Cl (B) Sunlight and ethane (C) Sunlight and CH_(3)CH_(2)Cl (D) Chlorine and ethane 22. In general terms, what type of a reaction does the reaction equation represent? (A) An elimination reaction (B) A subsitution reaction (C) An addition reaction (D) A combustion reaction 23. If If according HCl to the equation: rules? (A) Markovnikov (B) Saytzeff (C) Clemmensen(D) Anti-Markovnikov 24. Which of these hydrocarbons is often used by panel beaters in their welding works? (A) Ethane (B) Ethene (C) Ethyne (D) Ethylene glycol 25. Which of this raw material is an easy source of acetylene ( A ) butane (B) CaCO_(3) (C) CaC_(2) (D) MgCO_(3) 26. Identify the correct order of leaving group in S_(N)1 reactions (A) F > Cl > Br > I (B) Cl < (:F > | > Br (C) I > Br > Cl≫F (D) None of the above 27. The following factors affect S_(N)2 reactions except (A) Structure of the electrophile (B) Nature of substrate (C) Solvent effects (D) Leaving groups 28. Which of the following reagents is not nucleophilic in nature? (A) HSO_(3) (B) SO_(3) (C) Cl (D) R^(**)Li 29. For most organic reactions, which of the following statements are true? (I) Nucleophilic displacement of hydrogen is not known (II) The OH^(') ion will attack a site of high electron density with difficulty, if at all (III) Saturated hydrocarbon are generally very reactive (A) (II) only (B) (I) and (II) only (C) (I) only (D) (II) and (III) only 30. What is the general formula of the alkanols, given that alkyl unit ( R ) is C_(n)H_(2n)+1 ? (A) RCOOH (B) ROH (C) ROR (D) RCOOR 31. If the heat of atomization (Q) of CH_(3)CH_(2)Br is +2730KJmol^(-1) . Find the bond energy of C-Br bond in CH_(3)CH_(2)Br . (Given that, {:C-C=+349KJmol^(-1),C-H=+415KJmol^(-1))*(A)+306 (B) -306(C)+5154 (D) -5154 32. Which of the figure below represents sp hybridization and the correct name of the compound 1 II III IV (A) I, Methane (B) IV, Ethyne (C) III, Ethyne (D) II, Ethane 33. Given the structure: C_(4)-C_(3)-C_(2)-C_(1)rarr- > . Which of the carbon atoms would experience greater inductive effects from X(A)C_(4) (B) C_(3)(C)C_(2) (D) C_(1) 34. The bond length of a C-O bond is 1.45 xx10^(-8)cm and the magnitude of charge is 0.150e . What is the dipole moment across the bond? [Note, {:A°=10^(-8)(cm)] (A) 0.103 (B) 0.022D (C). 0.218D (D) 1.044D 35. What is the 4 th term of spin quantum number if the energy level of electron is 5//3 ? (A) 3//4 (B) -3//4 (C) 4//3 (D) -4//3 36. Given that the bond length and the dipole moment of a carbonyl compound are 1.43"Å" and 0.86D respectively. What is the value of charge on this bond? (A) 0.215e (B) 0.125e (C) 1.125e (D) 1.215e 37. What are the respective bond angles of But-1-ene and But-1-yne? (A) 120° and 180° (B) 109.5° and 180° (C) 180° and 90° (D) 120° and 109.5° 38. The geometrical configurations of sp,sp^(2) and sp^(3) orbitals are respectively .................. and ............... (A) Linear, octahedral and trigonal (B) Linear, trigonal tind tetrahedral (C) Octahedral, tetrahedral and linear (D) Trigonal, linear and tetrahedral Page 7 of 4
Question
177
Answer
4.0(267 votes)
Ronaldo Dela CruzElite · Tutor for 8 years
Answer
<p> <br />20. A<br />21. C<br />22. B<br />23. A<br />24. C<br />25. C<br />26. C<br />27. D<br />28. B<br />29. B<br />30. B<br />31. A<br />32. C<br />33. D<br />34. C<br />35. B<br />36. B<br />37. A<br />38. B<br /></p>
Explanation
<p> <br />20. The correct format for filling electrons into orbitals is given by Aufbau's principle, Hund's rule, and the Pauli exclusion principle. Option A represents the correct order of filling.<br /><br />21. The reaction of chlorine gas with ethane in the presence of sunlight is a substitution reaction. The correct catalyst is sunlight (X), and the main product is chloroethane, CH3CH2Cl (Y). Hence, the answer is C.<br /><br />22. The reaction between chlorine gas and ethane is a substitution reaction, where a hydrogen atom in ethane is replaced by a chlorine atom. Therefore, the correct answer is B.<br /><br />23. The reaction of 2-Methylpropene with HCl is an addition reaction where HCl adds across the double bond. According to Markovnikov's rule, the hydrogen atom attaches to the carbon with more hydrogen atoms, and the chlorine attaches to the carbon with fewer hydrogen atoms. Hence, the answer is A.<br /><br />24. Ethyne (acetylene) is often used by panel beaters in their welding works due to its high flame temperature when burnt with oxygen. Therefore, the answer is C.<br /><br />25. Calcium carbide (CaC2) is an easy source of acetylene. When reacted with water, it produces acetylene gas. Thus, the answer is C.<br /><br />26. In SN1 reactions, the leaving group ability is generally Iodide (I) > Bromide (Br) > Chloride (Cl) > Fluoride (F). Therefore, the correct order is C.<br /><br />27. The factors affecting SN2 reactions include the structure of the electrophile, nature of the substrate, and solvent effects. Leaving groups do not affect the rate of SN2 reactions. Hence, the answer is D.<br /><br />28. Among the given options, SO3 is not nucleophilic in nature. It is a strong electrophile. Therefore, the answer is B.<br /><br />29. Statement I is correct as nucleophilic displacement of hydrogen is generally not observed. Statement II is also correct; the OH ion attacks sites of low electron density, not high. Saturated hydrocarbons are generally not very reactive, making statement III incorrect. Therefore, the answer is B.<br /><br />30. The general formula for alkanols is ROH, where R is an alkyl group. Given that the alkyl unit (R) is CnH2n+1, the formula ROH represents alkanols. Hence, the answer is B.<br /><br />31. To find the bond energy of the C-Br bond in CH3CH2Br, we use the given heats of atomization and subtract the known bond energies (C-C and C-H) from the total heat of atomization. The correct calculation leads to +306 KJmol−1. Therefore, the answer is A.<br /><br />32. Ethyne (C2H2) is an example of sp hybridization. Among the given options, III represents ethyne. Hence, the answer is C.<br /><br />33. The carbon atom closest to the substituent X will experience the greatest inductive effect. In this structure, C1 is closest to X, so it will experience the greatest effect. Therefore, the answer is D.<br /><br />34. The dipole moment is calculated using the formula: dipole moment = bond length × magnitude of charge. Using the given values, the correct calculation results in a dipole moment of 0.218D. Hence, the answer is C.<br /><br />35. The fourth term of the spin quantum number is always either +1/2 or -1/2. Given the energy level of the electron as 5/3, the spin quantum number does not change and remains at either +1/2 or -1/2. Therefore, neither of the given options is correct.<br /><br />36. The charge on the bond is calculated using the formula: charge = dipole moment / bond length. Using the given values, the correct calculation results in a charge of 0.125 e. Hence, the answer is B.<br /><br />37. The bond angle in But-1-ene is approximately 120° due to its sp2 hybridization, and in But-1-yne, it's approximately 180° due to its sp hybridization. Therefore, the answer is A.<br /><br />38. The geometrical configurations of sp, sp2, and sp3 orbitals are linear, trigonal, and tetrahedral, respectively. Hence, the answer is B.<br /></p>
Does the answer help you? Rate for it!
You might be interested
Explore more questions
- What is your observation when you add 4ml of CaCl_(2) solution to 4ml of Na_(2)CO_(3) solution?See Answer05/27/2024
- Activity 3: What type of bond do you form?Directions: Imagine yourself and the people around you as atoms. Just like atoms, you need to form bonds to be more stable. Your attitude, talents and potentials, love and care, advises and compliments, and the things you treasure should serve the function of electrons. Based on your understanding on the concept of ionic and covalent bonds, what type of bond do you want to form with other people? What do you want to do with your electrons? Support your answer. Your answer should not be less than 7 sentences and not more than 10 sentences.See Answer05/27/2024
- What is the correct name for KBrO3 Select one: a. Potassium Hypobromate b. Potassium Bromite c. Potassium Bromide d. Potassium BromateSee Answer05/27/2024
- B. Identify whether the covalent bond formed is polar or nonpolar.1. mathrm(H)-mathrm(F) 2. mathrm(Br)-mathrm(Br) 3. mathrm(C)-mathrm(Cl) 4. mathrm(C)-mathrm(C) 5. mathrm(N)-mathrm(O)See Answer05/27/2024
- 4. What type of weathering is1 point responsible for formation of Calcite when mineral-rich water is released from a hot spring?Mechanical WeatheringChemical WeatheringPhysical WeatheringHydrologic WeatheringSee Answer05/27/2024
