BIOCHEMISTRY
POLAR AND NONPOLAR MOLECULES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They exist in metals.
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They always result to ionic compounds.
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They always result to polar molecular compounds.
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They may give nonpolar covalent compounds depending on geometry.
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Detailed explanation-1: -Answer: They may result to non polar covalent compounds depending on molecular geometry. Explanation: A polar bond is a covalent link formed by two atoms in which the distribution of the bond’s electrons is uneven.
Detailed explanation-2: -The correct answer is the atoms of a non polar bond have no or very small differences in their electoral negativity ease, although there are no hard And a fast rules.
Detailed explanation-3: -Carbon dioxide CO2 has polar bonds but is a nonpolar molecule. The structure of CO2 is linear. The individual bond dipoles cancel each other as they point in opposite direction and are equal in magnitude.
Detailed explanation-4: -In polar covalent bonds, the electrons are shared unequally, as one atom exerts a stronger force of attraction on the electrons than the other. The ability of an atom to attract a pair of electrons in a chemical bond is called its electronegativity.
Detailed explanation-5: -Out of the given bonds, C-H bond would be considered non-polar covalent because the electronegativity of both C and H is 2.1. The difference in their electronegativity will be zero and thus the C-H bond is considered to be non-polar. So, the correct option is (B) C-H.