Page 1 : SHREE RAJLAXMI ROYAL ACADEMY OF SCIENCE VITA., , STATES OF MATTER DPP:-1, , SUB TOPIC:- HYDROGEN BONDING., , , , (1) H-Bonding is exhibited by, (a) All the molecules containing H-atoms, (b) Molecules in which H is covalently bonded to F, O, or N, (c) Molecules in which two H atoms are present, (d) Molecules in which H is bonded to atoms with electronegativity greater than 2.1, Which of the following hydrogen bond is strongest in vapour phase, (a) HF--— (b) HF, , Which of the fallowing shows hydrogen bonding, , (a) NH, {b) PHs (c) AsHs (d) SbHs, , Among HF,CH,,CH.OH,and N,H, intermolecular hydrogen bonding is expected, , (a) In all {b) In all leaving one (c) In two (d) None of these, Intramolecular H-bonding is present in, , (a) Metanitrophenol —_(b) Salicylaldehyde (c) Hydrogen chloride (d) Benzophenone, The O-H bond distance in water molecule is, , (a)1.0A {b) 1.33A (c)0.96A (d) 145A, , The pair af molecules forming strongest hydrogen bonds are, , (a) SiH, and SiF, (b) CH, -C—CH, and CHCl,, , oO, , (c) H-C-OHand CH, -C-OH (d) H,OandH,0,, I I, oO oO, , Strongest hydrogen bonding is shown by, , (a) Methanol (b) Dimethylamine, , (c) Acetic acid (d) Methyl thioalcahol, Hydrogen bonding is maximum in the, , (a) Carbinol (b) Ethyl fluoride, , (c) Ethyl chloride (d) Triethy! amine, Organic compound soluble in water contains, , (a)GH (b)C 4,0 (jcs (d) C,H, Cl, Density of ice is less than that of water because of, , (a) Extensive hydrogen bonding, , (b) Crystal modification of ice

Page 2 : (c) Open porous structure of ice due to hydrogen banding, , (d) Different physical states of these, , The hydrogen bond is strongest in, , (a) F-H..0 (b) F-H....F, (c) O-H...S (d) O-H...N, Hydrogen fluoride is a liquid unlike other hydrogen halides because, , (a) HF molecules associate due to hydrogen bonding, , (b) F, is highly reactive, , (c) HF is the weakest acid of all hydrogen halides, , (d) Fluorine atom is the smallest of all halogens, , Which one is appreciably soluble in water, , (a) CS, (b) C,H,OH (c) CCl, (d) CHCl,, Hydrogen bond formation depends upon, , (a) High electronegativity of atoms (b) High electropositivity of atoms, (c) Both (a) and (b) (d) None of these, , Incorrect order of decreasing boiling points is, , (a) HF > HI > HBr > HC) (b) H,O>H,Te > H,Se > H,S, , (c) Br, > Cl, >F, (d) CH, > GeH, > SiH,, , In which one of the following compounds does hydrogen bonding occur, , (a) SiH, {b) LiH (c) HI (d) NH,, Between the HF -----—- HF, hydrogen bond will be, , (a) Compact {b) Strong (c) Weak (d) None of these, Which one shows maximum hydrogen bonding, , (a) H,O {b) H,Se (c) H,Te (d) HF, The intermolecular attractive forces vary in the order, , (a) Water < Alcohol < Ether (b) Water > Alcohol > Ether, , (c) Alcohol > Water < Ether (d) Ether > Water > Alcohol, Which does not show hydrogen bonding, , (a) C,H,OH (b) Liquid NH, (c) H,O (4) Liquid HBr, NH, has abnormally high boiling point because it has, , (a) Alkaline nature (b) Distorted shape, , (c) sp*-Hybridization (d) Hydrogen bonding, , The boiling point of p-nitrophenol is higher than that of o-nitrophenol because, , (a) NO, group at p—position behaves in a different way from that at o—position, , (b) Intramolecular hydrogen bonding exists in p-nitrophenol, , (c) There is intermolecular hydrogen bonding in p-nitrophenol, , (d) p-nitrophenol has a higher molecular weight than o-nitrophenol

Page 3 : Which one of the following hydrogen halides has the lowest boiling point, (a) HF (b) HC! (c) HBr (d) HI, NH, has a much higher boiling point than PH, because, , (a) NH, has larger molecular weight, , (b) NH, undergoes umbrella inversion, , (c) NH, forms hydrogen bond, , (d) NH, contains ionic bonds whereas PH, contains covalent bonds, , Which is appreciably soluble in water, , (a) CH,COOH (b) H,S (c) CCl, (d) CHCI,, Which one has the highest boiling paint, , (a) Acetone (b) Ethyl alcohol(c) Diethyl ether (d) Chloroform, , Which molecule does not have hydrogen bonding in its molecules, , (a) HF (b) H,O (c) NH, (d) HI, There is no hydrogen bonding in, , (a) Acetic acid (b) Ammonia (c) Ethyl alcohol (d) Diethyl ether, In which of the following compounds intramolecular hydrogen bond is present, , (a) Ethyl alcohol (b) Water, , (c} Salicylaldehyde (d) Hydrogen sulphide