mcq biology

MCQ on Water, pH and Buffer Systems Part 1 (Multiple Choice Questions in Biochemistry MCQ-11)

mcq on water chemical & physical properties

 (Sample/Model/Practice Questions for CSIR JRF/NET Life Science Examination, ICMR JRF Exam, DBT BET JRF Exam,, GATE BT and XL Exam, ICAR JRF NE Exam, PG Entrance Exam, JAM Exam, GS Biology Exam and Medical Entrance Exam)

(1). Water is liquid at room temperature, the most important reason for this is the:

a.  High boiling point of water
b.  High melting point of water
c.  High heat of vaporization of water
d.  Cohesive forces due to hydrogen bonds in water

(2). Water is a ___

a.  Polar solvent
b.  Non polar solvent
c.   An amphipathic solvent
d.   Non polar uncharged solvent

(3). Polar molecules can readily dissolve in water. This is because:

a.  Polar molecules can form hydrogen bonds with water
b.  Polar molecules can replace water-water interaction with more energetically favourable water-solute interactions
c.  Polar charged water can interact with the charge of polar molecules
d.  All polar molecules are amphipathic in nature

(4). Most important reason for the unusual properties of water is:

a. The covalent bonding pattern in water molecule
b.  The bond angle between the two hydrogen atoms in water
c.   Hydrogen bonding between water molecules
d.  Water can be immediately ionized at room temperature

(5). The H – O – H bond angle in water molecule is:

a.   104.0o
b.   104.5o
c.   105.0o
d.   105.5o

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