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) t dlectrons (C) an electron and a neutron an electron and a proton 5. Hydrogen

ID: 295375 • Letter: #

Question

) t dlectrons (C) an electron and a neutron an electron and a proton 5. Hydrogen bonding (A) occurs as a result of the attraction of polar molecules (B) exists only between water molecules (C) explains why water has sucha low heat capacity (D) none of these. 6· 1n a sugar water solution, sugar is considered the (A) sediment (B) solute (C) solvent (D) all of these. 7The higher the percentage of salt in seawater (A) the more dense the water (B) the greater the buoyancy of water (C) the lower the freezing point of water (D) all of these. 8In which layer of the atmosphere does most of the weather we experience occur? (A) troposphere (B) stratosphere (C) ionosphere (D) none of these 9Which of the following air masses would have the highest air pressure? (A) a warm, humid air mass (B) a warm, dry air mass (C) a cold, humid air mass (D) a cold, dry air mass 2741 (over) 85

Explanation / Answer

ANSWER-

5. A) occurs as a result of attraction of polar molecules.

molecules that have non-polar covalent bonds donot form hydrogen bonds.

6. B) solute.

sugar is considered as solute in a water-sugar solution.

7. D) all of these.

8. A) TROPOSPHERE .

9. D) a cold ,dry air mass.

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