Water 1. Hydrogen atoms bonded with carbon do not participate in the hydrogen bonding with other compounds because, Because hydrogen element is smaller than carbon Hydrogen is not an electronegative element The difference between electronegativity of both the elements is not much Both elements belong to separate group in the periodic table None 2. Life of hydrogen bonding in water Increases with heating Decreases with heating Stabilised by heating No change in the life of H-bonding None 3. 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 4. 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 5. Which of the following chemical bond containing compound may not be soluble in water? N-H C-H O-H I&III None 6. Which of the following will have high boiling point? CH3OH CH3CH2OH Water CH3CH2CH2OH None 7. Hydrogen bond are strongest when Kinetic energy of the participating compounds is highest Both participating electronegative elements are same They are present in the hydrophobic environment Hydrogen elements and participating electronegative elements are in a straight line 1 & 2 3 & 4 None 8. Which of the following is true? Free hydrogen ion exist as a result of ionisation of water Ionisation product of the water i.e. H+ form a hydronium ion (H3O+) with H2O molecule Free H+ forms hydrogen bond to yield hydronium ion None of the above. None 9. Which of the following is not the strategy to transport the insoluble gases into the biological system Using an alternative gas Use of carrier proteins Chemical modification of the gaseous form All of the above. None 10. As biological cells require large amount of glucose molecules which lead to increased osmolarity of the cytosol, which act by cells help keep the osmolarity at check? Active transport Faster metabolism Polymerisation None of the above. None Time's up
