Water 1. Which of the following statement is correct? Water is an ionising compound It ionises reversibly Ionisation of water can not be described the equilibrium constant All of the above. I&II None 2. How many average number hydrogen bonds a water molecule in ice under atmospheric pressure forms with other water molecules? 4 2 3 3.4 None 3. Which of the atom may lead to greater electric dipole moment? Oxygen Hydrogen Carbon All of them will form equal electric dipole moment None 4. Which of the following will have high heat of vaporisation? CH3OH CH3CH2OH Water CH3CH2CH2OH None 5. What is true about the strength of the hydrogen bonding Directionality of the participating elements in the hydrogen bonding influence the strength of the hydrogen bonds Electronegativity difference in the elements might cause the difference in the hydrogen bond strength They get weaker if the kinetic energy of the molecule increases All of the above I & II None 6. A three dimensional shape of a polypeptide Is a most stable form polypeptide conformation Is facilitated by maximised weak interactions Contributes to overall increase in the entropy All of the above None 7. What is a cohesive force? Intermolecular force of attraction A forcer that hold matter together These are coulombs forces A, B&C None 8. Choose the correct mechanism of dissolving a salt in water? Water hydrates the salt component Water partially neutralises the ionic charge Reduces the electrostatic interaction between ions preventing lattice formation All of the above None 9. Which of the following ions have the fastest mobility under electric field? Na+ K+ Cl- H3O+ None 10. Which of the following mechanism is employed by multicellular animals to avoid osmotic lysis? Presence of non-expandable cell wall Increasing concentration of certain proteins in blood plasma Active transport of Na+ ions in the interstitial fluids. All of the above 2&3 None Time's up
