When amphipathic compounds are mixed with water, a. a. Non polar molecules are uncharged a. (13). c.       H+ ions can move in water very fast by proton hopping (9). Non polar molecules are uncharged, b. You can download all these questions papers and study materials as PDF from our Slideshare account absolutely free, (adsbygoogle=window.adsbygoogle||[]).push({}), (4). c.       1.6 Å (a) metallic bond. Bond length between H and O atoms in water is: (2). Maximum in liquid water and minimum in water vapour Elements that are the most electronegative are found _____. The van der Waals radius of Oxygen atom in water molecule is. d.      NH3 and H2S are non-polar but NO is polar. (14). Non polar molecules cannot be ionized, c.       Non polar molecules are unable to form water-solute interaction, d.      Hydrogen bond formation is not possible with non-polar molecules, (5). – O – H … O – X Which of the following statement is true? Which of the following statement is true? H - Cl < Cl - Cl < Br - Cl. (1). (a) ortho. d.      1.8 Å, (3). 1.4 Å 0.0965 nm d.      CO2 and O2 are polar and soluble in water, but N2 is non-polar and insoluble in water. (12). Lehningers Principles of Biochemistry: Chapter: Water Please take advantage of our Lecture Notes, PPTs, Previous Year Questions, Mock Tests, and Video Tutorials for your preparation. Which of the molecules below would not form hydrogen bonds? All are polar and completely soluble in water, c.       NH2 and H2S are polar but NO is non-polar, d.      NH3 and H2S are non-polar but NO is polar, a. in the lower left-hand corner of the periodic table. (10). Fundamentals of Biochemistry by Voet and Voet: Chapter: Water. It can readily dissolve in water, b. Water molecules ionize into H+ and OH- ions. Why is hydrogen bonding only possible with hydrogen? the energy released when an electron is added to an atom. (a). Which one of the following elements is least likely to participate in a hydrogen bond? a. More stronger (c) hydrogen bond. (10). Crowe & Bradshaw: Chemistry for the Biosciences 3e. Factors governing the formation of an ionic bond are ___________ (a) low ionization energy of metal … a hydrogen atoms form an ionic bond with one other atom. a. A large quantum of questions in our practice MCQ is taken from previous year question papers of various national and international Biology / Life Sciences competitive examinations. Which of the following diagrams indicates how water molecules hydrogen bond. Which of the following molecule do not form hydrogen bond with water? – N – H d.      Same in ice, liquid water and water vapour, (7). (d). In solid hydrogen, the intermolecular bonding is: (1) ionic (2) van der Waals' (3) metallic Ans. Non polar molecules cannot be ionized Non polar molecules are unable to form water-solute interaction, (6). b.      CO2 hemoglobin complex Ans. (b) … c.       0.965 nm in the lower right-hand corner of the periodic table. c.       Converted to neutral solution 3.4 a. Water has a slight tendency of ionization. Ans. c.       10-13 M2 At room temperature and atmospheric pressure, a single water molecule can be hydrogen bonded with __________ water molecules. b. Hydrogen is the only atom that is the same size as an oxygen atom. Which of the following bonds would be mostly ionic? Silicon dioxide, SiO 2 80. a. a. At room temperature and atmospheric pressure, a single water molecule can be hydrogen bonded with __________ water molecules. The hydrogen atom and the two atoms that share it are in separate molecule, c.       The hydrogen atom and the two atoms that share it are in very close contact, d.      The hydrogen atom and the two atoms that share it are in a straight line, a.       CO2, O2 and N2 are non-polar and completely insoluble in water, b.      CO2, O2 and N2 are polar and soluble in water, c.       CO2 and O2 and N2 are partially soluble in water, d.      CO2 and O2 are polar and soluble in water, but N2 is non-polar and insoluble in water, a. pair on an electronegative atom on an adjacent molecule. 16. (c). (13). (b) London dispersion. Movement of H+ ions in water to negatively charge electrode (cathode) is extremely faster than Na+ or K+ ions, this is because: a.       H+ ions are smaller than Na+ or K+ ions b. Which of the following compounds has the highest boiling point? The hydrogen atom and the two atoms that share it are in the same molecule, b. c.       2.4 Sine pKa is negative log of Ka, higher the pKa value, the weaker will be the acids. Ans. b.      CO2, O2 and N2 are polar and soluble in water d.      The hydrogen atom and the two atoms that share it are in a straight line. (15). – O – H It can readily dissolve in water Ans. Maximum in ice and minimum in water vapor, For the calculation we have to use the ion product concept of water, The ion product of water Kw = [H+][OH-] = 1 X 10-14 M2, We know the concentration of OH- ions as 0.1, Substitute in the above equation and rearrange for [H+], i.e., [H+] = Kw / [OH-] = 1 X 10-14 M2 / 0.1 M. Ka is the dissociation constant of acids and bases. Ans. c.       – O – H … H – O – X Which one of the following elements is least likely to participate in a hydrogen bond? (11). d.      9.650 nm, (2). d.      1.4, (4). Which of the following is the correct for the formation of a hydrogen bond? (Hydrogen bond is represented as ‘…’). The hydrogen atom and the two atoms that share it are in separate molecule NEET Chemistry Hydrogen questions & solutions with PDF and difficulty level. It can form micelles in water. in the upper right-hand corner of the periodic table. (1). nitrogen. 1. in the upper left-hand corner of the periodic table. (A) A network solid with covalent bonding (B) A molecular solid with zero dipole moment (C) A molecular solid with hydrogen bonding (D) An ionic solid (E) A metallic solid 8. 10-13 M text. b. a. Non polar molecules are insoluble in water. Hydrogen bonding occurs in molecules when _____. a hydrogen atom bonded to small electrogeative atom is attracted an electron b. Copyright © Oxford University Press, 2016. c.       – C – H Solid ethyl alcohol, C 2 H 5 OH 9. partial negative charge. c.       CO2 and O2 and N2 are partially soluble in water Fluorine exerts a stronger attraction for the electrons in the bond than NEET help on Whatsapp Chat. More weaker c.       The hydrogen atom and the two atoms that share it are in very close contact Nitrogen would have a partial positive charge and fluorine would have a All Rights Reserved. This is because: Which of the following is the correct for the formation of a hydrogen bond? d. Hydrogen tends to form covalent bonds. Which of the following statement is true? 2. H - Cl < Br - Cl < Cl - Cl. the attraction of atoms for their electrons. Non-polar molecules can contain polar bonds. Which of the following amino acid side chains cannot participate in a hydrogen bond? This is because: a. a hydrogen atom forms a covalent bond with one other atom. The number of inter-molecular hydrogen bonds between water molecules will be: Multiple Choice (Choose the best answer.). This hydronium ion can migrate to cathode under the electric current by proton hopping. b. b. Non polar molecules are insoluble in water. Maximum in ice and minimum in water vapor c.       Minimum in liquid water and maximum in water vapour What is the concentration of H+ ion in a solution of 0.1 M NaOH?