Hydrogen Bonding The number of secondary hydrogens in 2, 2-dimethylbutane is (a) 8 (b) 6 (c) 4 (d) 2 Ruhul Amin Alig
Hydrogen Bonding Two condensation polymers are made (1) ethylene diamine + ethane–1, 2– dicarboxylic acid (2) trimethylenediamine + ethane–1, 2– dicarboxylic acid if both polymers of same molecular weight are obtained then which of the following statements is/are correct ? (i) Polymer (1) is found to melt at lower temperature. (ii) Polymer (2) is found to melt at lower temperature. (iii) H-bonding is major factor. (a) (i), (ii) and (iii) (b) Only (ii) (c) (i) and (iii) (d) (ii) and (iii) Ruhul Amin Alig
Hydrogen Bonding Nylons, polysters and cotton, all posses strength due to: (a) intermolecule H-bonding (b) van der Waals’ attraction (c) dipole-dipole interaction (d) None of the above Ruhul Amin Alig
Hydrogen Bonding Secondary structure of protein is mainly governed by (a) hydrogen bonds (b) covalent bonds (c) ionic bonds (d) disulphide bonds Ruhul Amin Alig
Hydrogen Bonding In DNA the linkages between different nitrogenous bases are : (a) peptide linkage (b) phosphate linkage (c) H-bonding (d) glycosidic linkage Ruhul Amin Alig
Hydrogen Bonding The correct order for the acidic character of the following carboxylic acids is Ruhul Amin Alig
Hydrogen Bonding The strongest acid among the following is – (a) Salicylic acid (b) m-hydroxybenzoic acid (c) p-hydroxybenzoic acid (d) Benzoic acid Ruhul Amin Alig
Hydrogen Bonding Ethanol and dimethyl ether form a pair of functional isomers. The boiling point of ethanol is higher than that of dimethyl ether, due to the presence of (a) H-bonding in ethanol (b) H-bonding in dimethyl ether (c) CH3 group in ethanol (d) CH3 group in dimethyl ether Ruhul Amin Alig
Hydrogen Bonding The boiling point of p-nitrophenol is higher than that of o-nitrophenol because (a) NO2 group at p-position behave 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. Ruhul Amin Alig
Hydrogen Bonding The vapour pressure of NO2 OH is higher than O2N OH due to (a) dipole moment (b) dipole-dipole interaction (c) H-bonding (d) lattice structure Ruhul Amin Alig
Hydrogen Bonding Which of the following are correctly classified ? Intermolecular Intramolecular H-bonding H-bonding (a) HF H2O (b) CH3OH HF (c) H2O o-nitrophenol (d) HF p-nitrophenol Ruhul Amin Alig
Hydrogen Bonding In which of the following state of compound the magnitude of H-bonding will be maximum and in which case it will be minimum ? (a) Maximum = Solid, Minimum = Liquid (b) Maximum = Liquid, Minimum = Gas (c) Maximum = Solid, Minimum = Gas (d) Maximum = Gas, Minimum = Solid Ruhul Amin Alig
