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Biochemistry - Water, pH and Macromolecules

Exercise : Water, pH and Macromolecules - Section 1
  • Water, pH and Macromolecules - Section 1
21.
A solution with pH = 5 is __________ than a solution with pH = 7.
2 times more basic
10 times more basic
10 times more acidic
100 times more acidic
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
The lone pair electrons on oxygen in a H20 molecule
carry a partial positive charge
are not important for the properties of water
carry a partial negative charge
form covalent bonds in ice
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
Which of the following statements about water is correct?
It is critical for many of the chemical processes found in living systems
Polar substances that can form hydrogen bonds will dissolve in it
Nonpolar substances like oils are not soluble in it
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
The strength of an acid depends on
number of neutrons gain
electronegativity
number of double bonds
number of protons released
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Which of the following statements about covalently bonded molecules is false?
Electrons are shared between the atoms that make up the molecule
Noncovalent bonds may also be present, especially if the molecule is large
Such molecules often result from the interaction of ionized atoms
The chemical bonds that hold the molecule together are relatively strong
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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